Day 1 :
Keynote Forum
Quenton Dokken
Gulf of Mexico Foundation, Inc., USA
Keynote: Wild caught plus cultured fisheries products – Can the demand be met without destroying the resource, the environment, and the dependent socioeconomic systems?
Time : 10:30-11:00
Biography:
Quenton Dokken is the President/CEO of the Gulf of Mexico Foundation, Inc. and past Associate Director of Center for Coastal Studies of Texas A&M University-Corpus Christi. As a Research Scientist, he has conducted studies in “The socioeconomics of Texas fisheries, the biological productivity of natural and artificial reefs, the ecology of ichthyoplankton in a bay system and the nutritional requirements of cultured species”. Today, he is working with fishers, processors, wholesalers, retailers, and chefs to maximize efficient utilization of seafood products.
Abstract:
Outlaw fishing, slave ships, overfished stocks, conflicting management strategies, conflict between harvest groups, disease in intensive culture conditions, eutrophication through the use of enriched feeds, habitat destruction, weakened gene pools, climate change, growing demand, etc., the state of fisheries globally is not on a course of sustainability. Recognizing the importance of fisheries, economically, culturally and nutritionally, this portends conflict and hardship in the future. Knowing these threats, what can we do to redirect the fisheries industry to a sustainable future? The solution lies in coordinated collaboration between governments, resource management agencies, law enforcement, scientists, fishers, wholesalers, processors, retailers, chefs, consumers, and environmentalists. The solution also requires commitment by vested interests to the mission of effective management, the goal to reach sustainability and the strategy to achieve the goal. This is not a new understanding or idea, yet to date this collaboration has not been adequately accomplished and the fisheries industries continue to sail toward extinction. We see the threat and know the causes; can we assert the will power to impose the solution?
Keynote Forum
Huarong Guo
Ocean University of China, China
Keynote: In vitro cell culture of marine invertebrates: Problems and prospectives
Time : 11:20-11:50
Biography:
Huarong Guo has completed her PhD from Institute of Oceanology, Chinese Academy of Sciences, China and Post-doctoral studies from University of South Carolina, USA. She set up her own lab in College of Marine Life Sciences, Ocean University of China in 2011 and focus on “The development of continuous cell lines from the adult tissues and early embryos of economically important penaeid shrimps”. She has been an executive council member of Shandong Society for Cell Biology (China) since 2014 and published more than 26 papers in reputed journals.
Abstract:
In vitro cultured animal cells have provided us a very powerful tool to study virology, molecular biology, cell biology and immunology, etc. In contrast to mammalian, fish and insect where the development of a variety of cell lines has become routine, the establishment of cell lines from marine invertebrates has been encountered with big obstacles, and there is no single established cell line from marine invertebrates reported. This talk reviews the advances, problems and prospectives in the field of marine invertebrate cell cultures.
- Fish Pathology & Physiology | Freshwater Fisheries | Fish farms: Planning a new one | Fisheries Statistics
Chair
Quenton Dokken
Gulf of MexicoFoundation,Inc., USA
Co-Chair
Huarong Guo
Ocean University of China, China
Session Introduction
Xinzhong Wu
Qinzhou University, China
Title: Developmental and evolutionary immunity of marine molluscan animals: Immune diversity and evolution
Biography:
Xinzhong wu is currently a Professor of Qinzhou University and Dean of Ocean College, Qinzhou University, China. He is a Scientific Researcher of Marine Mollusc Disease and Mollusc and Fish Immunology. He has published 46 papers in English reputed journals and more than 60 papers in Chinese. Now, he is the 11th council members of Asian Fisheries Society; Chair of workshops, symposia and training committee of AFS; Councilor of Federation of Asian Biotech Association; member of steering committee of World Oyster Society; Councilor of China Society of Fisheries and; Councilor of Chinese Society of Oceanography. He served as an Editorial Board Member in several journals of international and China.
Abstract:
Recently relevant findings from molluscs expanded our traditional concepts in the field of innate immunity, namely from simple and homogeneous invertebrate immune system to the sophisticated and diversified innate immune system to host defense against pathogens, which include the effect of molecular diversity or increased abundance on immune diversity of molluscs, pathways that involved in molluscan immunity and how mollusk and pathogen interact at the molecular level. In particular the completion of related complete genome sequence from mollusc species gives the opportunity to examine the evolution of gene families, sequence divergence from different components of the innate immune system and the origins of some novel immune-related genes and their families in evolution. Here, we detailed some of the examples among these mollusc models to emphasize the diversities of the immune genes, their families and the diversified responses of innate immunity. We sought to discuss the drives or evolutionary dynamics of differences currently within the innate immune system from the present study existing in fact. In addition, we put forward the necessity of studying on comparative immune diversity with different invertebrate models.
Ana Carolina de Azevedo Mazzuco
Federal University of Sao Paulo, Brazil
Title: Scales of variability in supply side ecology of a marine invertebrate: Challenges to stock-recruitment forecasting
Biography:
Ana Carolina de Azevedo Mazzuco has completed her PhD from University of São Paulo. She is currently a young Researcher and Environmental Consultant at Deep Blue. She is also an extended member of IMAR/Federal University of São Paulo. Her studies focus on “Benthic-pelagic coupling in rocky shore invertebrates”. She has more than 10 years of experience in scientific field. She has published two papers in reputed journals and has presented her work at important scientific meetings.
Abstract:
The state of exploited populations is a function of the stock and recruitment, which are regulated by larval supply and settlement rates. Environmental conditions causes supply side processes to vary in space and time at several scales challenging recruitment forecasting. In this study, we assessed the relationship between supply side processes in Perna perna, a commercial rocky shore bivalve, and meteorological-oceanographic conditions at different spatial-temporal scales. This study was conducted at South Brazilian Bight, a subtropical region influenced by upwelling and meteorological fronts. Larval supply, settlement and recruitment rates were measured monthly, weekly and daily from 2012 to 2013, with local (km) and regional (10-100 km) resolutions. Meteorological-oceanographic conditions were described by physical forcing (wind speed and direction, wave and sea level height), chlorophyll-a concentration and sea surface temperature. Results show that the strength of the relationship between supply side processes and environmental conditions depends on the temporal scale. The degrees of correlation between ecological and environmental variables were low and specific larval supply mechanisms could not be identified. Local contrasts were responsible for most of the variability in supply side processes; however, regional coincidences blocked recruitment along the region. These results suggest that processes at both scales have similar power when regulating recruitment, affecting community to species levels. This study highlights the importance of scales of variability when predicting marine stocks.
Ozlem Ablak Gurbuz
Texas State University, USA
Title: Reverse effect of dams on fish populations in Turkey
Time : 12:40-13:05
Biography:
Ozlem Ablak Gurbuz has completed her PhD at Gazi University, Turkey and Post-doctoral studies at University of Massachusetts, USA. She is a Research Scholar at Texas State University in San Marcos. She has published more than seven papers in reputed journals.
Abstract:
Turkey, located between Europe and Asia, has six main and 25 sub-river basins hosting 153 endemic fish species out of 368 freshwater fish. One of main activity on rivers in Turkey has been constructions of dams. As of the beginning of 2015, there are 857 dams in operation and 600 dams under construction across Turkey. Dams on rivers would change overall temperature regimes, sediment transport and biotic homogenization. Besides, dams restrict migratory fish species and might cause loss of aquatic fauna and flora particularly endemic fish species. For this reason, dams are one of the greatest global threats for freshwater biodiversity. 51% of freshwater fish species of Turkey has been reported as critically endangered (CR) and 32% of that endangered (EN). Therefore, an environmental flow in any stream is vital for fish species. This paper will focus on effects of dam constructions on freshwater fish species in Turkey and underline importance of environmental flow in a stream for fish species.
Seher Dirican
Cumhuriyet University, Turkey
Title: The latest status of aquaculture in sivas on Central Anatolia of Turkey
Biography:
Seher Dirican is an Assistant Professor in Fisheries Department at University of Cumhuriyet, Turkey. He has published more than 15 papers in international journals. His research interests include “Fisheries, aquaculture and environment, water quality, aquatic organisms, pollution and limnology”. He is an Editor and Reviewer in various international journals.
Abstract:
Aquaculture is the fastest growing food producing industry in the world. Aquaculture production will certainly continue to be one of the most viable methods to supply population’s increasing demands of high quality animal proteins. Sivas is a city in central Anatolia of Turkey. The city, which lies at an elevation of 1278 m in the valley of the Kızılırmak river, is a moderately sized trade center and industrial city, although the economy has traditionally been based on agriculture. This study was carried out to determine the latest status of aquaculture in Sivas. Intensive aquaculture in Sivas is mainly related to fresh water aquaculture, which shows the best expansion prospects. In Sivas, rainbow trout (Oncorhynchus mykiss Walbaum, 1792) is the most common fish species cultured in both land based raceways and cages. According to current official figures, 46 rainbow trout farms are present in the Sivas and their total production capacity is about 5541 tons in 2015. Aquaculture has a effect on the environment as other agricultural activities. The target of aquaculture rises in a style that does not damage the environment. Therefore, environmentally friendly production and monitoring of environmental effects of aquaculture is required for sustainable aquaculture in Sivas.
Ogunremi J B
Federal University Wukari, Taraba State, Nigeria
Title: Information sources and accessibility among fisher folks in Ese - Odo and Ilaje local government areas of Ondo State, Nigeria
Biography:
Ogunremi J B completed his PhD from University of Ibadan, Nigeria and has specialization in Fisheries and Aquaculture Extension. He is a Senior Lecturer and Pioneer Head at Department of Fisheries and Aquaculture, Federal University Wukari, Taraba State, Nigeria. He is a senate member of the University, has served and still serving as Chairman or member of various committees in the University. He is a member/coordinator of different professional associations. He is involved in teaching, research and community service and has presented research papers at conferences. He has also published more than 26 papers in reputed journals and edited conference proceedings and has been serving as Reviewer for local and international journals of repute.
Abstract:
A multistage random sampling procedure was employed to select two local government areas (Ese-odo and Ilaje), six fishing communities and 12 fisher folks from the study area to get a sample size of 144. A structured questionnaire and scheduled interview was used to collect data from the respondents. Data were analyzed with the use of descriptive statistic such as frequency counts and percentages. Chi-square was used to test relationships between the variables. The results showed information need of fisher folk on fishing gear maintenance 92.4%, weather 88.2%, modern fish capture method 86.8%, sources of micro credit 86.8% and 57.6% had access to information. Extension agents 13.2% and friends 11.8% were the major sources of information among the fisher folk. The chi-square analysis indicated that no significant association existed between accessibility and information source among fisher folk on extension agents (χ²=0.37, p>0.05), research institute (χ²=0.18, p>0.05), non-governmental organization (χ²=0.12, p>0.05), radio (χ²=0.26, p>0.05), television (χ²=0.08, p>0.05) and friends (χ²=0.19, p>0.05), It is recommended that government should maximally utilize all available information sources to reach the fisher folk to boost protein supply through artisanal fisheries.
Biography:
Maryam Akhoundian has completed her MSc from Tarbiat Modarres University of Tehran. After 9 years spent on research and teaching in universities, she compeleted her PhD from Khorramshahr University of Marine Science and Technology. She is an Assistant Professor in Marine Biology at Marine Science of University of Mazandaran, Iran.
Abstract:
The Roach, Rutilus rutilus caspicus, is a potential for commercial aquaculture in Iran. One of the most significant constraints limiting commercial production of Roach is the lake of a reliable supply of eggs and larvea. A narrow window of annual spawning prevents year-round availability of juveniles for grow out. The present study reports the use of photoperiod and temperature manipulation to alter the time of spawning in female R. rutilus caspicus and increase availability of larvae which is so mean to sustainable aquaculture. Mature female Roach were maintained 70 days under a simulated natural light (NL) and 16L/8D, 11L/13D and 9L/15D photoperiod regimes. Water temperature was adjusted on 14, 20 and 24ºC. Reproductive development was monitored by histological analysis of gonadal biopsies and plasma level of 17β-stradiol and 17α-hydroxy progestron as main sexual steroids were investigated as well. The results showed that, follicle growth and spawning in females were advanced approximately two months by exposure to the long day regime. This research also suggested that in the process of oocyte maturation of Roach, photoperiod appeared to be more affective than temperature for even in the lowest experimental temperature (14°C), the fish exposed to the long photoperiod had earlier maturity and spawning in comparision to natural light regime. These finding suggest that photoperiod manipulation can be used to alter the reproduction cycle in Roach and control the supply of eggs for commercial aquculture.
Liberato V. Laureta
University of Philippines Visayas, Philippines
Title: The dynamics, ecology, production and economic aspects of exploited populations of Oriental angelwings in the coastal waters of Central Negros Occidental, Philippines
Biography:
Liberato V Laureta is a Professor of College of Fisheries and Ocean Sciences at University of the Philippines Visayas. He completed his MS in Aquaculture at University of the Philippines, the premier learning institution of the country, and PhD in Life Sciences (Marine Biology) at University of Liverpool in England. Being involved in research for many years, he published several papers in international and national peer-reviewed journals. His greatest contribution to science is the publication of the book entitled “Compendium of the Economically Important Seashells in Panay, Philippines” which has become reference for students of marine biology, fisheries, aquatic fauna or similar areas of study starting from high school to college. Fortunately, this book had been awarded as outstanding book in the field of Natural Science by two prestigious science institutions in the country. Currently, his research work focuses on “The development of suitable technologies for the hatchery and nursery operations of the Philippine green mussel Perna viridis”.
Abstract:
The people of Central Negros Occidental, Philippines pride themselves with the very important mollusk resource in their coastal waters, the oriental angel wing (Pholas orientalis) or locally called diwal. Being considered as a delicacy due to its succulent, sweet juicy taste, unique flavor, and likewise believed to have possessed an aphrodisiac element in it, this species has become a major source of livelihood for numbers of fishermen in this area. However, there is a need to have baseline information as basis for developing management schemes in order to either restore or conserve and protect the P. orientalis population towards sustainable production and utilization. This research paper presents results of the field survey conducted on the ecology, population status and distribution of the marine resource in the six municipalities comprising Central Negros. Likewise information on the history of the angel wing industry, its seasonality and yearly production including marketing which were gathered through interviews are presented. The prospects of the angel wing industry to prosper lie on the joint collaboration of the concerned divers, coastal residents, barangay and local officials, traders, the academe, funding agencies and the national government. Some fishery management strategies are presented and discussed in this paper, which are important to effectively manage the resource in this area toward sustainability.
Ma. Eugenia Vega-Cendejas
CINVESTAV-IPN, Unidad Mérida, Mexico
Title: Spatial variation of demersal fish communities in the Platform and Channel of Yucatan
Time : 15:40-16:05
Biography:
Maria Eugenia Vega-Cendejas has been working on taxonomy and ecology of fish communities, contributing to biodiversity knowledge in protected areas and coastal -marine ecosystems. She has used the fish resources on impacted ecosystem as bio-indicators of the environmental quality, and studied trophodynamics and energy fluxes in coastal ecosystems considering fish association (structure) and the use of the ecosystem (function).
Abstract:
The nature semi-closed of the Gulf of México, together with its oceanographic pattern and freshwater discharges, provide a rich region considering biodiversity. However, the demersal fish community structure is almost not known, even that this great ecosystem has been continuously impacted by oils spills and over exploitations of fishery resources. The present study was developed to evaluate spatial variation of the demersal fish community, considering depth gradient in the platform and channel of Yucatan in southern Gulf of Mexico. Fish sampling was realized in 18 stations with an oceanographic ship using a shrimp trawl at 99 m as average depth. A total of 130 species were recorded, where Serranidae family was the most diverse (10 species), following in importance Paralichthyidae (eight species), Sparidae and Triglidae with seven species each. The most representative specie considering density was Syacium papillosum (12.4% del total). The highest density and biomass were recorded in the Channel of Yucatan due to the abundance of Sphoeroides spengleri and Syacium papillosum. Considering fish composition and abundance, three groups of stations were associated. Fish abundance relationship to three ranges of depth was not significant. However, in the superior stratum (<50 m), the highest species richness (103) was obtained; while at 100 m, the diversity (3.35 bits) was recorded. By contrast, at the highest depth (>200 m), the lowest species richness (41) and diversity (2.9 bits) were found. These results are the first ones conducted in the region, contributing to the management of the large ecosystem of the Gulf of Mexico in order to stop further decline in biodiversity. This information is also a line base to evaluate the changes in demersal fish community originated by oil spills and other stressors related with climate change.
Cristelle Tiwo Tsapla
Dschang University, Cameroon
Title: Effect of ice storage on the textural and rheological properties of proteins from freshwater fish: Cyprinus carpio
Biography:
Cristelle Tiwo is a Researcher in Department of Food Science and Biotechnology, Dschang University, Cameroon. She is specialized in Nutrition and Food Security. She was a Research Associate in Food Protein and Fishery Transformation. She has visited many research institutes in Asia such as CIFT, CIFE and College of Fishery in Mangalore, India. She is implicated in many publications and is now writing a chapter in a scientific book.
Abstract:
The properties of proteins from fresh fish common carp (Cyprinus carpio) meat and its suitability for the preparation of fish sausage have been evaluated. The protein solubility of fish meat in high ionic strength buffer was 77.16%. The dynamic visco-elastic behavior of fish meat in the temperature range of 25-90oC using controlled stress rheometer revealed ability to form strong gel network which was further confirmed by frequency sweep test. The gel strength and texture profile analysis (TPA) of fish sausage prepared from Cyprinus carpio revealed elastic properties. The ice storage stability of fish as judged by physical, chemical, microbiological and sensory parameters was found to be 15 days. Gel strength of ice stored fish reveals that decreasing trend at 0th day of prepared gel strength was 668.2 gm.cm and at the end of the 15th day ice storage fish mince prepared gel was 398.70 gm.cm.
Sogbesan Olukayode Amos
Modibbo Adama University of Technology, Nigeria
Title: Performance of Clarias gariepinus (Burchell) fed solid state fermented groundnut (Arachis hypogeal) shell supplemented diets
Biography:
Sogbesan Olukayode Amos has completed his PhD from University of Ibadan, Nigeria in 2007 and Post-doctoral studies from Central Institute of Freshwater Aquaculture, Bhubaneswar, India in 2012. He is a Senior Lecturer and immediate past Head of Department of Fisheries at Modibbo Adama University of Technology, Yola. He has more than 50 peer reviewed journals to his credit and he is an Editorial Board Member of reputed journals.
Abstract:
This research study was carried out to evaluate the effect of feeding fermented groundnut shell supplementary diet on the biochemical performances of Clarias gariepinus fingerlings. Semi flow through consist of 15 plastic bowls were used and 10 Clarias gariepinus fingerlings (mean weight (3.00±0.05 g) per plastic bowl, each in triplicate. Five treatment bowls were fed experimental diets containing 40.00% crude protein supplemented with fermented groundnut shells. Diet one- unfermented groundnut shell (control diet), diet two- 12 hours fermented groundnut shell without potash, diets three, four and five- fermented groundnut shells with potash at fermentation time of 12, 24, and 48 hours respectively. Data generated were subjected to ANOVA at p<0.05. The results of the experiment showed that the best feed conversion ratio (FCR) was also recorded in fish fed diet five (0.43). Results showed that there were increase in the blood parameters of Clarias gariepinus fed fermented groundnut shell supplemented diets compared to the control diet but were statistically different (p<0.05). Highest packed cell volume of 22.23%, white blood cell 15.50 x 103, red blood cell 9.35 x 106 and haemoglobin 10.35 g/dl were recorded in fish fed diet five. All blood parameters obtained were between the ranges of recommended fish blood. It is concluded that using fermented groundnut shell as supplementary feed on Clarias gariepinus shows a slight increase in the hematological parameters compared with the control diet but it has no negative effect on the health status of the studied fish. However, diet five can be used as feed in aquaculture to enhance fish health, survival and growth performance.