Day 3 :
- Track 8: Aquaculture Disease & Chemotherapeutics
Track 9: Women in Aquaculture and Fisheries
Track 11: Aquaculture in Asia-Pacific Countries
Track 12: Aquaculture Marketing and Business
Chair
Debashish Mazumder1
1Australian Nuclear Science and Technology Organisation
Australia
Co-Chair
Sadiqul Awal
Melbourne Polytechnic
Victoria Australia
Session Introduction
Nunik Cokrowati
Mataram University
phillipines
Title: Implementation of the seaweed production adaptive to climate change
Time : 09:30-09:55
Biography:
Nunik Cokrowati has completed her Master at the age of 26 years from Gadjah Mada University. She is lecturer at aquaculture study program Mataram University. She has published more than 5 papers in local journals and 1 paper in international journal. She concern at seaweed cultivation research and plankton researh.
Abstract:
This research purposes are to increase the production of seaweed species Eucheuma or Kappaphycus spp. adaptive to changes in water conditions and to produce high quality of seaweed continuosly accepted by industry troughout the year. In order to achieve these objectives, suitability analysis of Eucheuma or Kappaphycus spp using different cultivation methods and the stimulation of the growth of Eucheuma or Kappaphycus spp by adding Sargassum aquifolium extract was carried out. The research method used was the application of an integrated action research and involvement of farmers who will implement the research purposes directly. The result shows that the combined use of Eucheuma or Kappaphycus spp. and method of cultivation significantly affects the absolute growth of Eucheuma or Kappaphycus spp. and content of carrageenan. The other results of this research shows that the application of Sargassum aquifolium extract has no effect on the growth of Kappaphycus alvarezii. The conclusion of this research is the best growth of Eucheuma spinosum is found in cultivation using longline method, the best growth Kappaphycus striatum is found in cultivation using bottom-off method, and the best growth Kappaphycus alvarezii is found in cultivation using raft method. The application of Sargassum aquifolium extract does not have a significant effect on the growth of Kappaphycus alvarezii but can increase level of carrageenan content.
Sevgi Savas
Suleyman Demirel University
Turkey
Title: The effect on fatty acid content of rotifer (Brachionus plicatilis) of suplemented of L-Carnitine to algamac 3050, Olio ω-3
Time : 09:55-10:20
Biography:
Sevgi Savas has completed her PhD at the age of 25 years from Egean University and postdoctoral studies from Aquaculture Department, Fisheries Faculty, Süleyman Demirel University. She is the dean of Fisheries Faculty.
Abstract:
In this study, it was determinated of the effect on fatty acid contens of rotifer (Brachionus plicatilis) of suplemented of L-carnitine to Algamac 3050, Olio ω-3 . S. parkle was used as feed in mass culture of B. plicatilis. Rotifer was applied feeding combined of commercial products suplemented with L-carnıtıne ; S. parkle, S. parkle + Olio ω-3, S. parkle.+ Olio ω-3 + L- karnitin, S. parkle + L-karnitin, S. parkle + Algamac 3050, S. parkle + Algamac 3050 + L-karnitin, S. parkle + Olio ω-3 + Algamac 3050, S. parkle + Olio ω-3 + Algamac 3050 + L-karnitin. Considerable differences were found in fatty acid composition of B. plicatilis fed with commercial enrichment diets. The highest EPA, DHA, PUFA were determinated enriched with S. parkle + Olio ω-3 + L-carnitine, S. parkle + Algamac 3050 + L-carnitine,S. parkle + Olio ω-3 + Algamac 3050 + L-carnitine in rotifer, respectively at 6 hour. The enrichment duration was found significant (P< 0,05) effect of PUFA content of rotifers.
Nor Fazliyana Mohtar
Universiti Malaysia Terengganu
Malaysia
Title: Potential use of gelatine from fishery by-products
Time : 10:35-11:00
Biography:
Dr Fazliyana has completed her PhD at the age of 27 from the University of Auckland, New Zealand. She is currently a lecturer at School of Fisheries and Aquaculture Sciences, Universiti Malaysia Terengganu. She has published widely and participated at many national and international conferences, and has been recognised with many awards and citations for her outstanding research. She was able to publish in top journals such as Food Chemistry, Food Hydrocolloids and Polymer Chemistry Journals. Her research interests include fish processing, utilisation of fishery by-products, extraction of collagen and its modification through chemical and enzymatic cross-linkings, and the physical properties of food proteins. Dr Fazliyana has been appointed as the external examiner for peer-reviewed journals, PhD and Masters theses. She has held teaching positions at the University of Auckland and Universiti Malaysia Terengganu. Dr Fazliyana has also been leading high-level programmes, and actively involved in many different organisations within the community that include organisations where she has volunteered, served on the board or other leadership role and participated in as a scientist. Dr Fazliyana is a member of New Zealand Institute of Food Science and Technology (NZIFST), International Food Technologist (IFT), New Zealand Institute of Chemistry (NZIC), and Malaysian Fisheries Society (MFS).
Abstract:
Gelatine is one of the most popular biopolymers widely used in food industries. It has been mainly derived from porcine skins and bovine bones. However, gelatine from marine sources has drawn extensive interest due to the requirements for Halal and Kosher ingredients in food product development and the rising concern of consumer about BSE in commercial mammalian gelatine products. Furthermore, the abundance of fishery by-products produced from keropok lekor industry has created the opportunity to extract the gelatine from fish sources. Therefore, the extraction of gelatine from several fish species was conducted and compared to the commercial mammalian gelatines. Fish gelatine exhibited relatively lower properties compared to the commercial ones. Therefore, modifications through chemical and enzymatic cross-linkings were conducted to improve its functional properties. The uncross-linked and cross-linked gelatine gels demonstrated distinctive differences in the molecular weight distribution, microstructure, gel strength, and degree of cross-linkings. The current findings have successfully proved that the modified fish gelatines can be an alternative to replace the mammalian gelatines. These improved functional properties could also create a significant demand for fish gelatine in food applications, in meeting the global requirements for Halal and Kosher markets as well as alleviating the waste disposal problem from the processing of keropok lekor.
Narin Chansawang
Thailand Institute of Scientific and Technological Research
Title: Effects of temperature on the elemental and biochemical composition of a marine microalga
Time : 11:00-11:25
Biography:
Narin Chansawang has completed her PhD in 2015 from University of Essex at England. She is a researcher of Bioscience department, Thailand Institute of Scientific and Technological Research. She is doing research about fresh water and marine algae.
Abstract:
A change in environmental conditions often leads to changes of physiology and biochemical composition of microalgae. Temperature is an important environmental factor regulating the growth of microalgae. In this study, the elemental and biochemical composition were measured in the marine haptophyte Emiliania huxleyi (clone CCMP 1516) in nutrient replete conditions. Triplicate cultures were incubated from 14oC to 22oC. Culture were illuminated under photon flux densities (PFD) 600 μmol photon m−2 s−1 on a 14L:10D cycle. The growth rate (GR) of E. huxleyi increased with temperature from 0.41 d-1 at 14oC to 1.12 d-1 at 22oC. Cell volume also varied with temperature. Cellular chlorophyll a, nitrogen, phosphorus, carbon and contents were also lower at 22oC than other temperatures. Protein, total amino acids from free and combined amino acid, and total pigments [mol accessory pigment (mol chl a)-1] were decreased with increasing temperature; however, the opposite response was observed in fatty acids. Myristic (C14:0) and oleic (C18:1) acid were predominant fatty acid approximately 18.1-22.9% total fatty acid. Eicosapentanoic acid (EPA, C20:5n3) and docosahexaenoic acid (DHA, C22:6n3) as polyunsaturated fatty acids (PUFAs) were found in E. huxleyi. The content of the highest DHA was 8.2 % total fatty acid at the low temperature while EPA content did not change (3-4 % total fatty acid) with temperature. The highest level of n-3 to n-6 ratio of the remaining fatty acids (~ 2) was achieved at 14oC of E. huxleyi which would make E. huxleyi suitable as a feed stock for aquaculture.
Janakiram P
Andhra University
India
Title: Mixed infection of abdominal segment deformity disease (ASDD) and Enterocytozoon hepatopenaei (EHP) in cultured Litopeneaus vannamei : histopathological and bacteriological studies
Time : 11:25-11:50
Biography:
Dr. janakiram P has obtained his Ph.D in Zoology from Andhra University , Visakhapatnam , India in the year 1999 and continued his post-doctoral studies in the same University. He is working as an Assistant Professor( Senior) in the division of fish pathology, Dept. of Marine Living Resources, Andhra University. He has published 16 research papers in National and International journals. He has been serving as one of the reviewers for the Indian Journal of Fisheries.
Abstract:
The diseased shrimp samples of cultured Litopenaeus vannamei showing symptoms of Abdominal Segment Deformity Disease ( ASDD ) with retarded growth were collected during the period 2013-2014 from East Godavari and Srikakulam Districts of Andhra Pradesh, India and subjected to histopathological and microbiological studies. Shrimp Tissues (viz. Gills, gut, muscle and hepatopancreas) were fixed in Davidson’s fluid and processed for histopathology. Gills have revealed the presence of excessive vacuolization. The innermost serosal layer of gut wall were eroded and sloughed-off into the lumen. The layers showed disintegration and also found the presence of encapsulated cysts bearing the spores of Enterocytozoon hepatopenaei(EHP). The muscle fibres were highly disintegrated , irregular, wavy and with more lacunae. In some regions, heavy haemocytic infiltration was also observed. In hepatopancreas, the tubules were completely degenerated and empty with severe haemocytic infiltration into the inter-tubular spaces. Chromatin-margination and nuclear hypertrophy were found in the tissue. Microsporidian cysts of Enterocytozoon hepatopenaei (EHP ) were found inside the B cells of the hepatopancreatic tubule epithelium as granular inclusions. PCR studies confirmed the presence of EHP. Haemolymph collected from the diseased samples have revealed the presence of Vibrio harveyi, V. alginolyticus and V. vulnificus as the associated Bacteria. Our study is the first report from India for the mixed infection of ASDD and EHP in cultured L. vannamei
Manuela Parini
SILO S.P.A Time : 11:50-12:15Title: Species independent efficacy of a specific composition of Monoglycerides of short and medium chain fatty acids in preventing EMS and controlling Vibrio parahaemolyticus, Aeromonas spp., Streptococcus uberis, Flavobacterium spp., Yersinia Ruckery, Pseudomonas spp. and Bacillus Cereus affecting shrimps and other aquatic species.
Biography:
Manuela Parini has a degree in Languages and Marketing. In 2000 she became member of the R&D Department of SILO SpA (Italy). From 2004 to 2007 she participated at the EU-project “Feeding Fat Safety” aimed at improving the safety level of fatty by-products and derivates to be used in commercial feeds. She published and participated as co-author in more than 10 studies and was invited as speaker at several conferences. In October 2015 she held a scientific speech at the conference of European Aquaculture Society in Rotterdam.
Abstract:
A specific compositions of 1-Monoglycerides of Short and Medium Chain Fatty Acids (from C2 to C12), available on the market under the commercial name SILOhealth 108, proved to exert a selective antibacterial action against pathogenic bacteria independently from the environmental pH, being antibacterial also at pH 7-8, that is in the conditions of the organs of aquatic species like gut, liver, hepatopancreas and other biological apparatuses. The MIC of the Monoglycerides composition at buffered pH 7 – 8 against Vibrio parahaemoliticus, Vibrio mimicus, Bacillus cereus, Aeromonas hydrophila, Yersinia ruckeri resulted to be 0.1%, against Flavobacteriun and Pseudomonas spp. 0.01% while Lactobacillus was not inhibited by the Monoglycerides composition. The composition has been tested in experimental conditions by the Public Animal Health Institute Bruno Ubertini (Italy) in juvenile sturgeon infected with 11 000 000 CFU of Aeromonas hydrophila: in the group treated with the composition the mortality was reduced by 80% (p < 0.001) and the SGR was increased by 13% (p < 0.01) compared to the control group. Applications in field proved that the composition is able to exert its actions independently from the specie. Penaeus Vannameis stocked in 3 ponds of 2 mu each (210 shrimps per square meter) in Zanjiang-China showed typical clinical signs of EMS: hepatopancreas, gut and faecal matter whitening. Vibrio Parahaemoliticus was isolated. The administration of the composition for 5 days decreased the mortality by 80% and restored normal growth. Above effects are repeatable independently from specie, being active in shellfish, freshwater and marine fish.
Ritchie Ann
University of the Philippines Visayas
Philippines
Title: Measuring the economic empowerment of women using an index: an application to small-scale fisheries and agriculture in sebaste, antique
Time : 12:15-12:40
Biography:
Ritchie Ann is curretnly PhD student in University of the Philippines Visayas
Abstract:
This study measured the economic empowerment of women from small-scale fisheries and agriculture sector of Sebaste, Antique. There were a total of 199 respondents selected using stratified random sampling. The Five Domains of Empowerment (5DE) Index was used in measuring the economic empowerment of study participants. Through this composite index, it was determined how women scored in the five domains of empowerment, namely production, resources, income, leadership, and time. The result of the study shows that women fishers are more economically empowered than women farmers. The two sectors showed high disparity in their scores on input in productive decision; autonomy in production; ownership of assets; control over use of income; group member; speaking in public; workload; and leisure. Group member indicator contributed largely to the disempowered population in both sectors. Although income of women farmers is higher than that of women fishers, the latter are still economically empowered which suggests that economic empowerment is not dependent on income alone. The study recommends that fisheries and agriculture organization for women should be established so that their needs and concerns will be heard and addressed. It is further recommended that government projects focused on enhancing women empowerment should also give importance on other factors such as organization and leisure and not just income to totally promote of women empowerment. Further studies on measuring women’s empowerment using other methods should be pursued to provide more information on women’s well-being.
Sunil Kumar D
Andhra University
India
Title: Inhibitory activity of bio-active compounds isolated from anadara granosa in shrimp health management
Time : 12:40-01:05
Biography:
Mr. Sunil kumar Duddu has obtained his M.Sc degree in Marine Biotechnology from Andhra University , Visakhapatnam , India in the year 2012 and continuing for Ph.D degree in the same University. He is currently working on the bioactive compounds of marine origin for shrimp health management. He has published 6 research papers in National and International journals.
Abstract:
Shrimp aquaculture production in the world is depressed mainly by diseases. Usage of antibiotics in aquaculture was banned as a precautionary measure to protect from bacterial resistance and bioaccumulation. In view of the above consequences, an alternate chemical or compound is essential to protect the stock. Hence, an intertidal mollusc i.e. Anadara granosa (Bivalve) has been selected for the isolation of bio active compounds. The crude extract was isolated from the muscle of A. granosa. and concentrated. It was tested against two pathogenic bacteria of the shrimp and fish viz. Vibrio harveyi and Staphylococcus aereus respectively by agar well diffusion method and maximum activity was shown against Vibrio harveyi by methanol and chloroform (9:1) extract. The crude extract was further subjected to contact bioautography guided screening to find out number of compounds showing antibacterial activity. Based on the results obtained in the above studies, the crude extract was also subjected to column chromatography studies to separate various fractions responsible for the antibacterial activity. Twelve fractions were obtained from the column chromatography and tested for their antibacterial activity. Out of twelve, five fractions have shown highest antibacterial activity and further run on column chromatography for purity. Each pure sub-fraction was subjected to NMR to observe the proton, C13 and H1-H1 correlation for the structure elucidation studies.
- Track 10: Aquatic Invasive Species
- Workshop on Ecohydrology and Ecological Biotechnologies for Improvement of Water Quality for and from Aquaculture
Session Introduction
Maciej Zalewski
UNESCO
Poland
Title: WorkShop on Ecohydrology and Ecological Biotechnologies for Improvement of Water Quality for and from Aquaculture
Time : 02:00-03:00
Biography:
Maciej Zalewski is Professor of Lodz University, Department of Applied Ecology and Director of European Regional Centre for Ecohydrology of the Polish Academy of Sciences. His research interests evolved from fish bioenergetics towards river ecosystems ecology, where he proposed the “Abiotic-Biotic Regulatory Concept” that defines hierarchy of factors determining structure of water communities along river continuum in different geographic zones. This theorem laid down foundations for a new paradigm for environmental sciences enclosed in Ecohydrology. He initiated the development of the Ecohydrology concept under the framework of UNESCO-IHP program and is a respected international expert in this field. As the expert of UNESCO Prof. Zalewski supported establishment of Centres for Ecohydrology in Portugal, Indonesia, China, Argentina and Ethiopia.rnProfessor Zalewski is a lecturer in national and international teaching programmes. He has been a chairman and keynote speaker of over 100 international scientific conferences and symposia and is an author of numerous publications and book chapters. He is also the founder and editor-in-chief of international journal of Ecohydrology & Hydrobiology, and member of editorial boards of Ecological Engineering, Brazilian Journal of Biology, Fisheries Management and Ecology journals. He is a leader of numerous scientific national and international projects. Currently holds h Index of 24 and is cited more than 2035 times in various scientific publications (according to Scopus) Professor Zalewski is a member of environmental scientific committees of the Polish Academy of Sciences, and member of the Advisory Board of the Polish Ministry of Environment. He served, among others, as the national representative for Polish government in the OECD Export Credits and Environment treaty negotiations, as a member of the Scientific Council of Regional Office for Science and Technology for Europe (ROSTE), chairman of the Working Group "Fish and Land/Inland Water Ecotones" of UNESCO MAB (Man and Biosphere) programme, chairman of the Working Group “Physical Habitat Modification and Freshwater Fisheries” of FAO EIFAC (European Inland Fisheries Advisory Commission) programme, member of the Council of the National Centre for Research and Development in Poland, representative of Poland at the Thematic Working Group in Environment of the European Strategy Forum on Research Infrastructures (ESFRI ENV TWG), representative of Poland in Thematic Process for 7th World Water Forum in Korea, chairman of the Steering Committee of UNESCO-IHP’s (International Hydrological Programme) "Ecohydrology" Programme and a member of the drafting taskforce for the EU Joint Programming Initiative (JPI) for water and the current UNESCO-IHP programmes.
Abstract:
WorkShop on Ecohydrology and Ecological Biotechnologies for Improvement of Water Quality for and from Aquaculture
- Special Session on Giant Freshwater Prawn Networking, Farming Innovation and Stock Conservation
Session Introduction
Shahreza Md Sheriff
Institute of Tropical Aquaculture
Malaysia
Title: Special Session on Giant Freshwater Prawn Networking, Farming Innovation and Stock Conservation
Time : 10:45-11:45
Biography:
Shahreza Md. Sheriff has completed his PhD in 2008 from Universiti Kebangsaan Malaysia in the field of genetic. He is currently the deputy director of Institute of Tropical Aquaculture, Universiti Malaysia Terengganu and also a lecturer in the School of Fisheries and Aquaculture Sciences, Universiti Malaysia Terengganu. He specializes in fish genetics and breeding focusing on broodstock management for genetic improvement of aquaculture species. Currently he is working on genetic analysis on Malaysian golden arowana (Scleropages formosus) dan tiger grouper
Abstract:
Giant freshwater prawn, Macrobrachium rosenbergii output from pond production has been on a declining phase for the last few years because of several issues concerning farm production and marketing. Despite some innovative farming methods like all male monosex culture adopted by various farmers towards achieving the peak output level, recurrence of several episodes of diseases together with deteriorated water quality and marketing problems adversely affected the sector. Farming of M. rosenbergii gained prominence in the late 1990s as the demand for prawns was increasingly felt as an alternative to the tiger shrimp, Penaeus monodon, the farming of which had suffered heavy losses from viral epidemics, and many legal regulations restricting production. The advantage of M. rosenbergii farming in promoting rural livelihood and food security is well known. The relatively less intensive farming operations and low stocking densities used, besides lower costs of production compared to marine shrimps enable this prawn to be a good choice for sustaining rural populations. Apart from the diseases, water quality and marketing issues, the recent introduction of the whiteleg shrimp, Litopenaeus vannamei into the market is also believed to have affected the prospects of M. rosenbergii because farmers tend to focus on the former as a more profitable enterprise and its farming is being expanded even to freshwater areas. Because the farming areas have reduced very much and many hatcheries have diverted to production of P. monodon and L. vannamei, there is an increased demand for the M. rosenbergii seed for farming in the remaining culture areas, although production issues in the hatcheries still remain unresolved. Thus, a special session to discuss about M. rosenbergii aquaculture and fisheries with specific objectives is to be proposed during this coming Aquaculture Summit 2016. This proposed session will specifically focused on three objectives; i) to form an international research networking group on M. rosenbergii, ii) to discuss recent findings and further research directions on M. rosenbergii and iii) to formulated a purposed international research grant working on M. rosenbergii culture. The theme for this special session is “Giant Freshwater Prawn networking, farming innovation and stock conservation”. Scientists, researchers, industry practitioners and academicians related to M. rosenbergii are expected to attend this proposed session.
- Track 1: Aquaculture Genetics and Breeding
Track 3: Sustainable Aquaculture
Track 5: Sea Food
Track 10: Aquatic Invasive Species
Chair
Barbara Montwill
U.S. Food and Drug Administration
USA
Co-Chair
Christopher Brown
WorldFish
South Asia
Session Introduction
Istiyanto Samidjan
Diponegoro University
Indonesia
Title: The improvement of intensive culture system technology on mud crab using different dosage of artificial feeds on lipid source of the growth and survival rate
Time : 03:00-03:25
Biography:
Istiyanto Samidjan is a Senior Lecturer of Fisheries and Marine Science Faculty, Diponegoro University, Indonesia
Abstract:
Mud crab (Scylla paramamosain) is one of important export commodity and valuable edible crabs in the market. The feeding technology implemented by farmer was remained simple. One of those principles was by implementing proper feeding of different dosage and lipid source on the growth and survival rate. The objectives of the research were the effect of different dosage source of lipid oil on the growth and survival rate of Mud crab (S. paramamosain) under technology of battery system conditions. The research used 180 mature mud crabs (S. paramamosain) and plastic cage with 30×30×20 cm measurement captured in the Petebon waters. The initial weight of those crabs was 143.3±2.5 g. The Experiment used Completely Random Design as follows treatment were applied with 4 treatments and 3 replications those were 1% feed biomass per day (A), 3% feed biomass per day (B), 5% feed biomass per day (C) and 7% feed biomass per day (D). The feeding was conducted twice a day (morning and afternoon). Data collection consisted of the growth, survival rate and water quality (i.e., Temperature, pH, DO, Salinity, Ammonia and Nitrite). Data was analyzed by ANOVA and Duncan Test and water quality used descriptive analysis. The result showed that application of artificial feed were significant effect (P<0.05) to the growth, survival rate and was highly significant in influencing the FCR, PER and NPU (P<0.01). Treatment B (3% feed biomass per day is the best treatment. It is giving the highest growth that is 57.93±1.68 g, survival rate (83.33±5.77%), FCR (1.08±0.03), PER (45.94±0.30), NPU (34.7167±3.163), moulting (3.90%). In general water quality of the rearing of mud crab used for the study is still within a good range for growth and survival rate of mud crab.
Chandravathany Devadawsona
Eastern University
Sri Lanka.
Title: Assessment of feeding habits of Sri Lanka freshwater fishes on their muscle lipid fatty acid composition and tocopherol contents
Time : 03:25-03:50
Biography:
Chandravathany Devadawson has completed her M.Sc & M.Phil at age of 35 in Stirling and Aberdeen University,UK and now PhD reader from Wayamba Unviersityof Sri Lanka and attached as Senior Lecturer /Zoology in Eastern University, Sri Lanka. She was Dean of Faculty, Head of Department and Director for Centre for Aqautic Resource Management. She has published more than 60 abstract papers in International and National conferences, 08 full papers in peer reviewed and proceedings journals and has wrote three books in Aqauculture and Fish and Shellfish dieseases. She has been resource staff in many fisheries and aquacuture related projects
Abstract:
The total lipid content, fatty acid composition and tocopherol content of muscle lipids of eleven fresh water fishes belongs to Cichlidae, Anabantidae, Siluridae, Cyprinidae, Channidae families lived in reservoirs in Sri Lanka were studied. Muscle lipid contents were varied between 1.6 - 41.5% of the fishes that having omnivorous, carnivoros and herbivorous feeding habits. Walking cat fish (Clarius branchysoma) having omnivorous feeding habit showed the highest total lipids (41.5%), polyunsaturated fatty acids (PUFA) (39.9%) and α-Tocopherol (29.65mg/g) in the muscle. The ratio of total n-3 to n-6 fatty acids in Walking cat fish is 1 confirmed consumption of cat fishes favourable for human health and has a particularly beneficial effect in preventing cardiovascular diseases. Tilapia (Tilapia moassambica), and Climbing pearch (Anabas testudineus) having omnivorous feeding habit showed 15.73 and 12.55% total lipids in the muscle and contained 5.6 and 2.5 mg/g α-Tocopherol respectively. However, Tilapia (Tilapia niloticus) shows very low total lipid (1.69%) and tocopherol (0.08mg/g). Fresh water shark (Wallago attu) having carnivorous feeding habit shows 11.29% total lipids, 4.02mg/g α-Tocopherol and 36% PUFA in muscle. Similarly, Rohu (Labeo rohita) having herbivorous feeding habit contained 10.84% lipids, 6.61mg/g α-Tocopherol and approximately 90% unsaturated fatty acids. Results of the study reveled that the lipid content, fatty acid composition and tocopherol content in the muscle of the freshwater fishes in Sri Lanka was not significntly influenced by the feeding habits of the fishes and no relationship with the families.
Suchitra Varior
Indegene Life systems Pvt. Ltd.
India
Title: Feed derived toxins and its importance in eco friendly and sustainable aquaculture practices
Time : 03:50-04-15
Biography:
Suchitra Varior has completed her PhD from Cochin University of Science and Technology, Kochi, India. She has worked on the biochemical and molecular effects of aflatoxins on Tilapia as part of her Doctoral Research. She is currently a Senior Analyst in Indegene Life systems Pvt. Ltd., a leading global provider of clinical, commercial and marketing solutions to global life science and health care organizations. She has published several papers in peer reviewed journals.
Abstract:
Aquaculture in its versatile form is getting popular in all parts of the world with indigenous technologies and approaches. Indeed it is essential to ensure food security and nutritional demands of growing populations. Organic practice of aquaculture is equally important while propagating scientific farming process in order to make the entire process sustainable and eco-friendly. Toxicological studies carried out in model organisms like Tilapia brought out interesting results with applications in farming practices. Various toxins brought into the system through aqua feeds and by way of chemicals for pond preparations are causing moderate to severe harmful effects to aquatic organisms and to the end users. The impact of toxins like Aflatoxin B1 seen associated with feeds still remains to be a serious threat. One of the viable alternatives would be to integrate the use of live feeds as well the formulated feeds. More and more feed formulations using natural algal and sea weeds extracts could also serve well to make the entire process more organic in nature.
Mano Mohan Antony
University College
India
Title: The influence of algal rich food in natural condition to increase fat content and umami taste in Etroplus Suratensis fresh water fish from Ashtamudi lake Kerala, India
Time : 04:30-04:55
Biography:
Mano Mohan Antony is now working as Assistant Professor, Department of Zoology, University College Thiruvananthapuram. He has completed his PhD from the University of Kerala and has published about 12 papers in the fish, biochemistry and ecophysiology. He has edited two books. His area of interest is research in fish biochemistry and physiology.
Abstract:
“Pearl spot” an Asian Cichlid, Etroplus suratensis is an important delicious food fish use in aquaculture. This fish naturally get acclimated to fresh water and capable of withstanding wide variation in salinity thus making its culture in enclosed and brackish water quite feasible. Etroplus is an predominantly an herbivore feeding mainly an aquatic micro and macrovegitation. Ashtmudi Lake is in the Kollam District of Kerala state in India. Etroplus is distributed all over the Lake. This species show difference in palatability aspects available from different sites of the lake. Kanjiracode area of this lake is famous for its special taste of pearl spot. Hence an attempt was made to evaluate and confirm how far the food habits of this species on ecologically different areas of this lake have an influence on the proximate composition. Five site of the lake were selected for the present study. Different biochemical variables of the muscle and gut content analysis was done and results were statistically analyzed. Fishes from the Kanjiracode site at all seasons show higher level of filamentous algae(43%) consumption that always predominately present naturally at this site and high level of fat content(2.87%) compared to other sites. Aromatic amino acids tyrosine and phenylalanine present in this fish especially at site1 was significantly at higher level. Phenylalanine was found to significantly enhance the umami taste. The fishes from Kanjiracode area showed most palatable due to the high value in fat content. Lipid content is an aspect affecting the flesh taste in many fish species. The fat content difference and amino acid differences due to the algal feed consumed by the fish and that those consuming maximum algal feed have more fat content which was contributed by this feed.
Andie John Tadeo
University-Institute of Fisheries
Phlippines
Title: Larval rearing of giant gourami (Osphronemus goramy Lacepede, 1801)
Time : 04:45-05:10
Biography:
Andie John Tadeo has completed his Masteral degree at the age of 28 years from the College of Fisheries, Central Luzon State University, Nueva Ecija, Philippines. Currently, he is one of the Instructors of Don Mariano Marcos Memorial State University-Institute of Fisheries, Santo Tomas, La Union, Phlippines.
Abstract:
Giant gourami has become one of the main species being cultured in southeast Asia and is in great demand in the aquaculture industry. The main constraint in giant gourami culture is the source of fry that should be standardized for commercial scale propagation. Assessment of growth performance, survival and body protein of giant gourami larvae fed with different types of live food organisms was conducted to identify the most suitable live food for larval rearing. Growth performance [mean final weight (FW) and length (FL)] of giant gourami larvae was significantly highest in enriched Moina (55.3±0.7mg and 16.27±0.29 mm), followed by unenriched Moina (41.0±0.6 mg and 14.73±0.17 mm), unenriched P. redivivus (31.7±0.3 mg and 10.47±0.35 mm), unenriched Artemia (31.0±0.3 mg and 12.20±0.23 mm), enriched Artemia (31.0±0.3 mg and 13.20±0.61 mm), enriched P. redivivus (31.0±0.3 mg and 10.53±0.75 mm) and mixed-zooplankton (19.7±0.9 mg and 8.87±0.24 mm). Highest mean survival of giant gourami larvae was obtained in enriched Moina (96.95±1.21%) but was not found to be significantly different from unenriched Moina (94.17±0.96%), enriched Artemia (87.78±0.55%) and unenriched Artemia (87.22± 5.30%). The lowest mean survival rate was obtained in Mixed-zooplankton (74.72±1.47%) but was not significantly different from those of unenriched P. redivivus and enriched P. redivivus (77.77± 4.82% and 83.33± 3.47%, respectively).
Zaleha Kassim
International Islamic University
Malaysia
Title: Effects of culture condition towards fatty acids In a Harpacticoid Copepod, Amphiascoides Neglectus (Lang 1965)
Time : 05:10-05:35
Biography:
Zaleha Kassim has completed her PhD in 2001from Universiti Putra Malaysia, Serdang. Her field of study is taxonomy and some ecological aspect of harpacticoid copepods. She is the head of a marine research station which focus on the aquaculture and oceanography. She involves in teaching the undergraduate and postgraduate students in the field of aquaculture and oceanography. She is active in innovative and product invention research particularly in live feeds study. She leads many applied type of research grants as well as knowledge tranfer program grant.
Abstract:
Copepods have been found as one of the best live feed in aquaculture. This study was carried out to determine the development time, growth performance and fatty acid content of a marine copepod, Amphiascoides neglectus, potentially become live feed for marine larval rearing. The laboratory experiments were designed to expose the population of A. neglectus to different sets of temperature, pH and salinity treatment. The copepods were maintained in the combination of salinity of 15, 25 and 35ppt, pH of 5,7,9 and temperature of 25, 28,35oC for 25days under hygienic condition. Fatty acid content was determined using gas chromatography method. The life cycle consists of six naupliar stages, five copepodite stages and an adult stage. Total development time of each life stages was from 9±3.61 h to 17 ±2.65 h and range from 53.86 µm to 593.98 µm in size. Nauplii, copepodites and adult stage showed highest population density when cultured in 28oC, salinity 25ppt and pH9 (T28P9S25). The bad growth performance was shown when they were cultured in 35oC, salinity 15 and pH5 (T35P5S15). A.neglectus cultured in T28P9S25 demonstrated the highest fatty acid contents with linoleic acid C18:2n-6 (LA), eicosapentaenoic acid C20:5n-3 (EPA), docosahexaenoic acid C22:6n-3 (DHA), arachidonic acid C20:4n-6 (ARA) and linolenic acid C18:3n-3 (LNA). The finding of this study could become the baseline for the optimum culture condition of A.neglectus.
Peng Jia
Sun Yat-sen University
China
Title: Mechanism of RLRs signal pathway against NNV in sea perch, Lateolabrax japonicus
Time : 05:35-06:00
Biography:
Peng Jia has completed his Bachelor's degree from Hunan Normal University and now is a doctoral candidate at Sun Yat-sen University. He has published 5 papers in reputed journals.
Abstract:
Sea perch (Lateolabrax japonicus), an economically important cultured fish species in Asian, has been challenged by RNA virus in recent years. Nervous necrosis virus (NNV) consisting of two co-encapsidated positive-sense RNA segments has been identified as the mainly cause of high mortality of mass larval-stage sea perch. The RIG-I-like receptors (RLRs) play a major role in sensing RNA virus infection to initiate and modulate antiviral immunity in low order vertebrates. To decipher the mechanisms of RLRs response to NNV in sea perch, we identified an NNV (strain SBN147), established two cell lines (LJB cells and LJF cells) from the brain of sea perch and cloned the LGP2, MDA5, MAVS and other related genes in RLRs signal pathway from the sea perch. Quantitative RT-PCR analysis showed that mRNA of these genes were widespread expressed in the tested tissues of healthy fish and significantly up-regulated post NNV infection. Furthermore, time course analysis showed that these genes transcripts significantly increased in the spleen, kidney and liver tissues after NNV infection. LjLGP2 mRNA expression was rapidly and significantly up-regulated in LJB cells after poly I:C stimulation and NNV infection. RNA interference experiment demonstrated that silencing of LjMDA5 signiï¬cantly increased NNV replication in NNV infected LJF cells. The viral gene transcription of NNV was significantly decreased in LjMAVS over-expressing LJB cells. The present results suggest that RLRs may play a vital role in antiviral innate immune against NNV in sea perch.
Yousuke Taoka
University of Miyazaki
Japan
Title: Amino acid profile of marine Eukaryotes, Thraustochytrids and possibility as protein source for aua-feeds
Time : 03:25-03:50
Biography:
Yousuke Taoka has completed his PhD at the age of 28 years from the United Graduate School of Agricultural Sciences, Kagoshima University and postdoctoral studies from University of Miyazaki. He worked in a commercial fisheries company, Nippon Suisan Kaisha, Ltd. as a reseacher and arrived at present post in University of Miyazaki at 2011. Recently, he has focused on the production of functional substances from marine microbes and the utilization in the field of aquculture
Abstract:
World aquaculture production has continued to increase. Fishmeal is used as protein sources for aqua-feeds. However, the price is drastically increased to around 170,000/ ton in 2013 during recent 10 years because of the decrease of fish resources, anchovy. This is serious problem for sustainable aquaculture. Therefore replacement of fishmeal to another resource is urgently needed. Thraustochytrids are widely distributed in marine environment and can ccumulate large amount of lipids in cell bodies. Therefore, thraustochytrids have attracted strong interests for production of valuable lipids. In the process of lipid extraction from the cultured cells, extract residue are produced as byproducts. It is considered that this extract residue except for lipids is mainly consists of protein. From the viewpoints of industrial application of thrautochytrid cells as protein sources, we have planned to apply this byproducts as protein resources instead of fishmeal for aquafeeds. In this study, we evaluated the amino acid profile of thraustochytirds as auafeeds. In the case of a thraustochytrid, Aurantiochytrium limacinum mh0186, the content of crude protein and lipid per g of the cultured cell were 333 mg and 440 mg, respectively. The amino acid of the cultured cells are mainly consisted of around 20 kinds including essential amino acid such as glycine, leucine, isoleucine, glutamate and arginine. At present, we have isolated more than one hundred thraustochytrids from marine enviroment and are making the amino acid profile. We are searching the adequite thraustochytrid strains as protein source in the field of aquaculture.
Zaleha Kassim
International Islamic University
Malaysia
Title: Life cycle of a benthic Harpacticoid, Amphiascoides Neglectus Lang , 1965 in laboratory condition and effect of some environmental factors on the population growth
Time : 02:35-03:00
Biography:
Zaleha Kassim has completed her PhD in 2001from Universiti Putra Malaysia, Serdang. Her field of study is taxonomy and some ecological aspect of harpacticoid copepods. She is the head of a marine research station which focus on the aquaculture and oceanography. She involves in teaching the undergraduate and postgraduate students in the field of aquaculture and oceanography. She is active in innovative and product invention research particularly in live feeds study. She leads many applied type of research grants as well as knowledge tranfer program grant.
Abstract:
Copepods have been found as one of the best live feed in aquaculture. This study was carried out to determine the development time, growth performance and fatty acid content of a marine copepod, Amphiascoides neglectus, potentially become live feed for marine larval rearing. The laboratory experiments were designed to expose the population of A. neglectus to different sets of temperature, pH and salinity treatment. The copepods were maintained in the combination of salinity of 15, 25 and 35ppt, pH of 5,7,9 and temperature of 25, 28,35oC for 25days under hygienic condition. Fatty acid content was determined using gas chromatography method. The life cycle consists of six naupliar stages, five copepodite stages and an adult stage. Total development time of each life stages was from 9±3.61 h to 17 ±2.65 h and range from 53.86 µm to 593.98 µm in size. Nauplii, copepodites and adult stage showed highest population density when cultured in 28oC, salinity 25ppt and pH9 (T28P9S25). The bad growth performance was shown when they were cultured in 35oC, salinity 15 and pH5 (T35P5S15). A.neglectus cultured in T28P9S25 demonstrated the highest fatty acid contents with linoleic acid C18:2n-6 (LA), eicosapentaenoic acid C20:5n-3 (EPA), docosahexaenoic acid C22:6n-3 (DHA), arachidonic acid C20:4n-6 (ARA) and linolenic acid C18:3n-3 (LNA). The finding of this study could become the baseline for the optimum culture condition of A.neglectus.
- Track 2:Aquaculture Engineering & Waste Management
Track 4: Equipments for Aquaculture & Fisheries
Track 5: Sea Food
Track 6: Seaweeds and Algal Aquaculture
Chair
Maciej Zalewski
UNESCO
Poland
Co-Chair
Janakiram Pasupuleti
Andhra University
India
Session Introduction
Debashish Mazumder
Australian Nuclear Science and Technology Organisation (ANSTO)
Australia
Title: Isotopic applications for ecologically sound cost effective aquaculture production
Time : 11:45-12:10
Biography:
Debashish Mazumder is a Senior Research Scientist in the Australian Nuclear Science and Technology Organisation (ANSTO) with more than 20 years of experience in aquaculture and aquatic ecology. He also holds adjunct academic positions at the University of New South Wales (UNSW), Macquarie University (both within Australia) and Beijing Forestry University, China. His area of expertise includes using nuclear and isotopic techniques to quantify the impacts of water management, land use and climate variability on the structure and function of aquatic ecosystems and to maximise the benefit of aquaculture operations. From 1990 to 1999, he worked with the WorldFish Centre to improve the production and management of aquaculture in Bangladesh. Since 2006, he has been collaborating with universities and government agencies in Australia, PNG, Malaysia and China on various environmental and aquaculture projects. He is an Associate Editor of WETLANDS, and published a significant number of peer reviewed journal papers and scholarly book chapters on stable isotopes.
Abstract:
Aquaculture is the fastest growing food producing sector globally. Future growth of aquaculture depends on a more ecologically sound management practice. The dietary effects on nutrient assimilation, isotopic turnover rates and discrimination factors were assessed using exponential models to determine the influence of microalgal diets on the growth and survival of hatchery-reared Pacific oyster larvae. Of the four dietary treatments used, larvae fed Chaetoceros calcitrans and a mixed diet had the best growth and high survival. Isotopic analysis of tilapia muscle tissue and all potential dietary sources from daily and weekly fed tilapia ponds suggests that natural feed such as detritus, algae and zooplankton appear to be favored more by tilapia than formulated feed. After 90 days of cultivation, the average final body weight of tilapia receiving daily feed inputs was 134 g while in weekly feed it was 92 g. The feed conversion ratio (FCR) was very high in the daily fed tilapia compared to a small FCR in the weekly fed ponds. Feed input cost for the weekly feeding treatment was much less than the daily feeding treatment. Isotopic techniques have the potential to develop cost-effective environment friendly aquaculture.
Stavros Platsis
Integrated Information Systems
Greece
Title: Applying data mining techniques to estimate FCR KPI in aquaculture
Biography:
Stavros Platsis is the Sales & Marketing Director of Manager Aquaculture Software. He graduated from the American College of Greece with a degree in Marketing and B.A. He established three successful firms in the fields of Advertising and Marketing, Film Music Industry and International Trade. He was one of the first to analyze and support the commercialization of Stevia as a natural sugar substitute in the Greek market with three design awarded innovations. He entered the aquaculture industry next to his mentor Mr Kostas Seferis in order to assist the penetration of smart information systems, like aquamanager aquaculture software, toward a more environmentally friendly, more efficient and better controlled production all over the world.
Abstract:
Although globally the aquaculture is one of the most rapid growing livestock production sector, however there are major challenges that have to be addressed concerning the improvement of the production, reducing the expenses, ensuring simultaneously the environment sustainability, the high quality food and animal welfare. The efficient confrontation of the aforementioned issues is the adoption innovative technologies which are capable to analyse and reveal potentially useful knowledge hidden in the accumulated data of aquaculture enterprises. The AquaSmart Horizon 2020 Project brigdes the gap between aquaculture sector and technological achievements on the field of Data Mining. This paper presents a use case demonstrating the conversion of data to actionable knowledge focusing in the problem of the evaluation of the feeding and the management of the fish. To address this multi-factor problem, aquacultures probe the behavior of FCR together with features such as SGR, SFR, the temperature, the production time etc in periodic datasets from sampling to sampling. The aim is to provide to fish farmers a reliable system that is able to recommend and also interpret the expected and unexpected behaviors of the fish batches during their growth. Specifically, on one hand the system provides to aquafarmer an automated suggestion of which batches or units exhibit unexpected FCR value comparing with the estimated by the model FCR value, so as to take further corrections. On the other hand, by considering and quantifying the interaction between all the relevant factors affecting the production process, we can investigate how the FCR can inform and enhance the production management process.
Stavros Platsis
Integrated Information Systems
Greece
Title: Applying data mining techniques to estimate FCR KPI in aquaculture
Time : 12:10-12:35
Biography:
is the CEO and managing director of i2s SA. Kostas graduated from the National Technical University of Athens with an MsC degree in Mechanical Engineering. He then followed an MSc course in Computer Science at the Institute of Management and Informatics. He has worked as a Senior Engineer for many companies and has successful market the company in large farming groups globally. Since 1997 he began work for I2S, one of the main IT players in the aquaculture sector (developer of the aquaManager platform, http://www.aqua-manager.com/). In 2004 he became the managing director and CEO of the company. He participated in a many research and development projects and has published a number of papers on knowledge management and ICT.
Abstract:
Although globally the aquaculture is one of the most rapid growing livestock production sector, however there are major challenges that have to be addressed concerning the improvement of the production, reducing the expenses, ensuring simultaneously the environment sustainability, the high quality food and animal welfare. The efficient confrontation of the aforementioned issues is the adoption innovative technologies which are capable to analyse and reveal potentially useful knowledge hidden in the accumulated data of aquaculture enterprises. The AquaSmart Horizon 2020 Project brigdes the gap between aquaculture sector and technological achievements on the field of Data Mining. This paper presents a use case demonstrating the conversion of data to actionable knowledge focusing in the problem of the evaluation of the feeding and the management of the fish. To address this multi-factor problem, aquacultures probe the behavior of FCR together with features such as SGR, SFR, the temperature, the production time etc in periodic datasets from sampling to sampling. The aim is to provide to fish farmers a reliable system that is able to recommend and also interpret the expected and unexpected behaviors of the fish batches during their growth. Specifically, on one hand the system provides to aquafarmer an automated suggestion of which batches or units exhibit unexpected FCR value comparing with the estimated by the model FCR value, so as to take further corrections. On the other hand, by considering and quantifying the interaction between all the relevant factors affecting the production process, we can investigate how the FCR can inform and enhance the production management process.
M P Paulton
Central Marine Fisheries Research Institute
India
Title: Indian edible oyster Crassostrea madrasensis (Preston), a promising bivalve for aquaculture amidst the challenges of global warming and climate change as revealed through thermo tolerance studies
Time : 12:35-01:00
Biography:
M P Paulton is a Senior Technical Officer in Marine Biotechnology Division of Central Marine Fisheries Research Institute
Abstract:
Temperature tolerance of a species is an indicator which determines its potential to persist or become extinct in response to climate change and the related environmental challenges. Identifying the winner species which can withstand the increasing biotic and abiotic challenges is essential for sustainable culture practices and thereby to ensure food for future. Aquaculture of the Indian edible oyster (Crassostrea madrasensis) is becoming more popular along the Indian coasts. Hence, knowledge on the level of thermo tolerance, its enhancement through thermal induction and the molecular mechanism behind it shall be of immense use for the scientific management of the system to ensure sustainable production. The oysters with size ranging from 70-80 mm collected from the oyster farm were acclimated in aerated sea water with salinity 22 ppt, temperature 280°C to 300°C and fed with micro algae nannochloropsis and isochrysis. The maximum temperature at which the oysters show tolerance and survive without mortality and the temperature at which almost all animals succumbed to death are referred as sub lethal temperature (SLT) and lethal temperature (LT) respectively. SLT and LT were determined as 44 0°C and 470°C respectively by exposing the acclimated oysters to temperatures ranging from 370°C to 470°C for one hour and monitoring the survival in normal acclimation temperature (280°C) for one week. Transcriptomic analysis of oysters recovering from SLT has shown a statistically significant up regulation of genes coding for heat shock protein 70 (Hsp70) and super oxide dismutase (Cu/Zn SOD). The oysters recovering from sub lethal shock (SLT) at 440°C were found to be resistant to the subsequent lethal temperature (LT) shock (470°C) while the control animals lacking previous exposure to SLT succumbed to death. The phenomenon of induced tolerance was evident and the oysters recovering from SLT were able to survive LT up to 26 days which stands as record duration ever reported. As reported earlier, the oysters surviving high temperatures would also survive the parasitic and microbial infection through the phenomenon of cross tolerance. The study has revealed the special potential of Indian edible oyster (Crassostrea madrasensis) in thermo tolerance and induced enhanced thermo tolerance over its European and western counter parts such as Crassostrea gigas and Crassostrea virginica. Thus, the Indian edible oyster (Crassostrea madrasensis) could be projected as a winner species with the ability to survive the challenges posed by climate change and related issues.
Eunice A Layugan
Cagayan State University–Aparri Campus
Philippines
Title: Polyculture of freshwater clam Batissa violacea and genetically improved farmed tilapia (GIFT) Oreochromis niloticus
Time : 01:45-02:10
Biography:
Eunice A Layugan has completed her PhD in Fisheries (Aquaculture) at the University of the Philippines College of Fisheries and Ocean Sciences Miag-ao Iloilo. She is the current Campus Executive Officer of CSU-Aparri Campus, and the former Dean of the College Fisheries and Marine Science and Director for Fisheries Research. She pioneered on endemic Clam Project, B. violacea from Cagayan River, for almost 20 years with almost 25 research studies conducted in various commodities. She is the only researcher entire the Philippines working along this species and was awarded most Outstanding Agricultural Scientist at both Provincial and Regional level in June 2004-2005, July 2011-2012. She presents paper in international, national and local, and has published international journals aside from written manuals, leaflets and patent.
Abstract:
Batissa violacea is a freshwater clam that is commercially important species and prevalent in Cagayan River, Philippines. This clam is the most expensive freshwater clam in Northern Philippines that supports the food supply and economic livelihood of many coastal communities. The population of this species in the wild has been dwindling due to over-exploitation and environmental changes. This study has been conducted to determine the potential of culturing the filter-feeding freshwater clam, B. violacea, with Genetically Improved Farmed Tilapia (GIFT) strain of Nile Tilapia Oreochromis niloticus. For 120 days, the growth performance of clam juveniles (initial shell length: 31-35 mm) was compared under two culture methods: (1) monoculture with stocking density of 25 clam/m3 (T1),50 clam/m3 (T2), 100 clam/m3 (T3), and 200 clam/m3 (T4);and (2) polyculture in combination with GIFT fingerlings (initial average weight: 10g) added at 20 fish/m3 on each clam stocking density treatment (T1-T4) similar to those in monoculture. The treatments for monoculture and polyculture have three replicates each in Randomized Complete Block Design using 2 x 4 Factorial Design. The results were analyzed using two-way Analysis of Variance (ANOVA) and Duncan’s Multiple Range Test (DMRT). The freshwater clam grown in polyculture with tilapia grew faster than those in monoculture. The highest density of 200 clams/m3 (T4) in both polyculture and monoculture showed significantly lower shell length growth compared with the lowest stocking density at 25 clams/m3 (T1); but no significant difference (p>0.05) was found with the stocking densities at 50 clams/m3 (T2) and 100 clams/m3 (T3). The average increase in weight of B. violacea was inversely proportional with stocking density, with the highest weight gain recorded at the lowest density of 25clams/m3 (T1). Although there was variation in growth at different stocking densities and culture methods, the interaction effect between two factors was not significant. Survival rate of B. violaceain polyculture, ranged from 94-97%; while in monoculture, the survival rate ranged from 94-96%. Biomass production was directly related to stocking density in both culture methods.
Kua Beng Chu
National Fish Health Research Division
Malaysia
Title: Caligus rotundigenitalis (Copepoda: Caligidae) infestation of crimson snapper (Lutjanus erythropterus) from Sungai Udang, Malaysia: Prevalence and recovery after freshwater bath treatment
Time : 02:10-02:35
Biography:
Kua Beng Chu completed her PhD at the age of 32 years from University Science of Malaysia (USM) in 2002. She is currently a Senior Research Officer at National Fish Health Research Division (NaFisH) of Fisheries Research Institute under Department of Fisheries Malaysia. Since 1996, she has been involved in research on fish health; focusing in fish parasite, pathology, disease prevention, treatment and management. She has published more than 40 technical papers in reputed journals.
Abstract:
Crustacean parasitic infestation particulary Caligus spp on farmed fish has been reported more frequently in Malaysia since 2008. The infestation usually associated with morbidity and mortality had caused significant economic losses. Freshwater bath has been used as treatment for Caligus sp. However, the effectiveness against copepod Caligus spp infestation had never been reviewed despite high prevalence reported. The study focused on determination of inner operculum caligids C. roundigenitalis prevalence and their recovery percentage after freshwater treatment. Ninety two farmed crimson snapper weighed 11 to 360g were obtained from Sungai Udang cages monthly. Each fish was treated individually with freshwater bath. The number of copepod dislodged from fish and showed no movement after 10 minutes were recorded. The individual copepod was then removed and placed in seawater for determination of recovery percentage. Prevalence ranging from 40 to 90% of C. rotundigenitalis with average mean intensity of 6 copepods C. rotundigenitalis in individual fish were isolated from the crimson snapper. The recovery percentage in seawater of 361 copepod C. rotundigenitalis showed average 45.7% after treated with freshwater bath. The freshwater bath showed that copepod C. rotundigenitalis were able to regain movement after 2 hours in seawater. Further observation on the survival of recovery copepod C. rotundigenitalis showed 44% and 37% after 6 and 24 hours respectively. The findings showed that there was a high posibility of copepod C. rotundigenitalis to re-infect when they are introduced back into the system, leading to recurrence of copepod C. rotundigenitalis in floating cages.
Sadiqul Awal
Melbourne Polytechnic
Victoria Australia
Title: Investigation into the potential use of inland saline groundwater for the production of live feeds for commercial aquaculture purposes
Time : 02:35-03:00
Biography:
Sadiqul Awal has completed his PhD at the age of 40 years from Deakin University Victoria Australia. He is currently working as a lecturer at Melbourne Polytechnic, Victoria Australia. He has published more than 20 papers in reputed journals and has been serving as reviwer in many journals. His reserach interest in aquaculture in inland ground saline water, microalgae, and estuarine environmental management.
Abstract:
Traditional agricultural methods and practices have rendered over 100 million hectares of land throughout the world, and over 5.7 million hectares in Australia, unsuitable for most forms of agriculture due to elevated salinity levels. Inland saline aquaculture is an adaptive approach to this environmental problem, and represents a potentially lucrative use for salt-affected land, with many economic, social and environmental benefits possible. Perhaps surprisingly, to date there has been relatively very little research conducted into the suitability (or otherwise) of inland saline aquaculture for the production of various species of microalgae and live feeds, which represent a crucial segment of the aquaculture industry. In this study, these potentials were examined. Initially 9 different species of marine micro algae from three different divisions, namely Chlorophyta, Bascillariophyta and Chrysophyta, were cultivated using batch culture techniques to examine their growth performance in inland saline ground water (ISGW) with f/2 algae culture media. This study expanded on the live feed species being tested to include Artemia (Artemia salina) rotifers (Brachionus plicatilis) and copepods (Cyclop ssp). While there were significant differences in the performance of all the tested live feed species, two groups of microalgae showed better growth rates than those observed for natural seawater. It is hoped that these results can be used proactively by farmers seeking to diversify their crops to include the aquaculture of finfish in salt-affected areas of Australia and elsewhere.
R.M.G.N. Rajapaksha
Uva Wellassa University of Sri Lanka
Sri Lanka
Title: Impacts of habitat quality variation on ichthyofaunal diversity in upper catchment area of Badulu-oya, Sri Lanka
Time : 03:00-03:25
Biography:
R.M.G.N. Rajapaksha has completed her BSc Honors Degree from Rajarata University of Sri Lanka and currently working as a Lecturer in Uva Wellassa University of Sri Lanka attached to Aquatic Resources Technology Degree Programme.
Abstract:
Richness of macro and micro habitats is one of the important factors that determine the species richness and species diversity in an aquatic habitat. Badulu-oya, tributary of River Mahaweli is well equiped with diverse habitats ideal for ichthyofauna. Increased anthropogenic activities have been pressued to dilute pristine qualities of the catchment. The study was based on twelve locations along 24 km stretch of the upper catchment of Badulu-oya including four lateral tributaries for eight months period. Ichthyofauna was sampled using medium size seine net, scoop nets and cast net within a 150 m reach in each location as covering 3 types of geomorphic channel units. Epifaunal substrate, embeddedness, pool substrate characterization, velocity/ depth regimes, pool variability, sediment deposition, channel flow status, channel alteration, frequency of riffles, bank stability, vegetative protection, riparian vegetative zone width were considered to assess the habitat quality index (HQI) in each location. A numerical scale of 0 to 20 were assigned for each parameter and ratings were totaled and compared to a reference condition to provide a final habitat ranking. Shannon-Wiener diversity index (H´), Margalef species richness index (Dmg) and Shannon Evenness (E) indexes were calculated for each location. Principle Component Analysis (PCA) was performed in order to identify underline patterns of correlations of habitat quality and Ichthyofaunal diversity indexes in different locations. Scores increase as habitat quality increases indicating high HQI have acheived locations which preserved their pristine nature. Nineteen ichthyofaunal species including five endemics, eleven indigenous and three exotic species which belong to 10 families were observed during the survey. Three Diversity indices were significantly differed (P<0.05) spatially. Highest H` (2.56 ± 0.05), Dmg (2.95 ± 0.11) and E (0.91 ± 0.019) were recorded in relatively pristine locations which earn higher scores for HQI. Five principle components (PC) were obtained with eigenvalues >1 summing almost 76% of the total variance in the data set. The PC 1 ansd PC 2 represented 24% and of 20 % of the data variability respectively. All most all locations which identified as a pristine correlated with the HQI and percentage cover of shade. HQI, Dmg and H’ were positively correlated with the PC 2. Locations with poor environmental quality and high anthropogenic disturbances were negatively correlated with the HQI and diversity indices. Relatively disturbed habitats qualities that received high load of urban discharges and low riparian vegetation recorded lowest diversity indexes. Tributary locations where preserve relatively high habitat qualities while habour high species diversity. Healthy aquatic ecosystem provides divers habitats for their inhabitants with stress free environment. Therefore it is timely focus on conservation of the pristine conditions of the natural aquatic habitats while sustainably deriving resources from them for the sake of preserve high biodiversity for the future. Authors thankfully acknowledge for the Financial supports given by the Association of Commonwealth Universities (Early Career Academic Grant Scheme 2016) and Uva Wellassa University of Sri Lanka
Chukwu-Osazuwa Joy
Federal University Oye Ekiti
Nigeria
Title: The growth performance of african catfish clarias gariepinus and beans plant cultivated using a locally constructed recirculatory aquaponics tank in Nigeria.
Time : 03:25-03:50
Biography:
Chukwu-Osazuwa Joy has completed her MSc. at the age of 26 years from Fisheries Biology and Management program, Marine Science Department, University of Lagos, Nigeria. She is an Assistant lecturer at the federal university oye Ekiti, Ekiti state, Nigeria. She has published a paper in Journal of the Science of Agriculture, Food Technology and the Environment, Ebonyi State University. Volume 12, ISSN: 1596 – 0056, October 2012. 1 – 8pp, titled “Evaluation of Pawpaw (Carica papaya) Seed for Controlling Reproduction in the Nile Tilapia (Oreochromis niloticus)”.
Abstract:
A recirculatory media filled aquaponics tank was constructed using local raw materials obtained from Lagos market, Nigeria. Twenty-five African catfish Clarias gariepinus each were reared in the fish unit of the aquaponics tank and a traditional flow through tank that served as a control for a period of 10 weeks. Five (5) days old beans plants were transplanted from nylon bags to the plant trough of the aquaponics system and also on the field (control) and grown for 10 weeks with the fish. Result shows that there was significant difference (P>0.05) in the length, weight and specific growth rate (SGR) of African catfish Clarias gariepinus reared in both media. There was no significance difference (P<0.05) in the length of beans plant cultivated on the field (control) and in an aquaponic system during the fourth to tenth weeks of culture. However, the leaf width showed significance difference (P>0.05) between both media in week 2 and 3 and weeks 5 to 9 with the aquaponics bean plant having broader leaves than the field beans plant. Beans plants cultivated in the aquaponics system developed beans seed during the 8 to 10 weeks, whereas beans plants cultivated on the field produced no beans seed even at the week 10 of the experiment, this may be attributed to the nitrate level in the plant tank of the aquaponics system. Between the 9th and 10th week of the experiment, some leaves of the beans plant cultivated in the aquaponics system started developing yellowish spots and tiny holes, this was caused by nutrient imbalance as iron, calcium and potassium which is lacking in fish feed and waste was not supplemented to the beans plant in the aquaponics plant unit. Aquaponics technology is a hybrid food growing system with high potentials for tropical plants and fish species and can efficiently replace the traditional system of fish and soil crop production especially in the face of high demand for food, nutrient-depleted soil and insufficient agricultural land space especially in Nigeria.
- Track 5: Sea Food
- Workshop on Ecohydrology and Ecological Biotechnologies for Improvement of Water Quality for and from Aquaculture
Chair
Barbara Montwill
U.S. Food and Drug Administration
USA
Co-Chair
Christopher Brown
WorldFish
South Asia
Session Introduction
Maciej Zalewski
UNESCO
Poland
Title: WorkShop on Ecohydrology and Ecological Biotechnologies for Improvement of Water Quality for and from Aquaculture
Time : 10:45-11:45
Biography:
Maciej Zalewski is Professor of Lodz University, Department of Applied Ecology and Director of European Regional Centre for Ecohydrology of the Polish Academy of Sciences. His research interests evolved from fish bioenergetics towards river ecosystems ecology, where he proposed the “Abiotic-Biotic Regulatory Concept†that defines hierarchy of factors determining structure of water communities along river continuum in different geographic zones. This theorem laid down foundations for a new paradigm for environmental sciences enclosed in Ecohydrology. He initiated the development of the Ecohydrology concept under the framework of UNESCO-IHP program and is a respected international expert in this field. As the expert of UNESCO Prof. Zalewski supported establishment of Centres for Ecohydrology in Portugal, Indonesia, China, Argentina and Ethiopia.rnProfessor Zalewski is a lecturer in national and international teaching programmes. He has been a chairman and keynote speaker of over 100 international scientific conferences and symposia and is an author of numerous publications and book chapters. He is also the founder and editor-in-chief of international journal of Ecohydrology & Hydrobiology, and member of editorial boards of Ecological Engineering, Brazilian Journal of Biology, Fisheries Management and Ecology journals. He is a leader of numerous scientific national and international projects. Currently holds h Index of 24 and is cited more than 2035 times in various scientific publications (according to Scopus).rnProfessor Zalewski is a member of environmental scientific committees of the Polish Academy of Sciences, and member of the Advisory Board of the Polish Ministry of Environment. He served, among others, as the national representative for Polish government in the OECD Export Credits and Environment treaty negotiations, as a member of the Scientific Council of Regional Office for Science and Technology for Europe (ROSTE), chairman of the Working Group \"Fish and Land/Inland Water Ecotones\" of UNESCO MAB (Man and Biosphere) programme, chairman of the Working Group “Physical Habitat Modification and Freshwater Fisheries†of FAO EIFAC (European Inland Fisheries Advisory Commission) programme, member of the Council of the National Centre for Research and Development in Poland, representative of Poland at the Thematic Working Group in Environment of the European Strategy Forum on Research Infrastructures (ESFRI ENV TWG), representative of Poland in Thematic Process for 7th World Water Forum in Korea, chairman of the Steering Committee of UNESCO-IHP’s (International Hydrological Programme) \"Ecohydrology\" Programme and a member of the drafting taskforce for the EU Joint Programming Initiative (JPI) for water and the current UNESCO-IHP programmes.
Abstract:
WorkShop on Ecohydrology and Ecological Biotechnologies for Improvement of Water Quality for and from Aquaculture