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• 31. [Article] Measuring Economic Performance in a Fishery: An Index Number Profit Decomposition

  Research Paper

  Citation × Citation Citation Abstract Copy Title: Measuring Economic Performance in a Fishery: An Index Number Profit Decomposition Author: Nhu Che, Tuong, Grafton, R. Quentin, Kompas, Tom, Fox, Kevin J. Research Paper Title: Measuring Economic Performance in a Fishery: An Index Number Profit Decomposition Author: Nhu Che, Tuong, Grafton, R. Quentin, Kompas, Tom, Fox, Kevin J. Research Paper Close

• 32. [Article] Resource Assessment Surveys As the Basis for Effective Fisheries Management

  This paper discusses the use of resource assessment surveys as the basis for effective fisheries management drawing on the resource assessment survey of the Arabian Sea coast of Oman. This survey, completed ...

  Citation × Citation Citation Abstract Copy Title: Resource Assessment Surveys As the Basis for Effective Fisheries Management Author: Shallard, Bruce, Al-Oufi, Hamed Said, Bose, Shekar This paper discusses the use of resource assessment surveys as the basis for effective fisheries management drawing on the resource assessment survey of the Arabian Sea coast of Oman. This survey, completed in 2009, has been undertaken in the context of the primary aim of the Oman Ministry of Fisheries Wealth (MFW) being to ensure that fisheries are developed and managed for the advantage of the people of Oman in a manner that is sustainable, maintains biodiversity and is consistent with the Code of Conduct for Responsible Fisheries. The goal of the survey was to provide estimates of the fishable biomass of principal demersal, small pelagic and mesopelagic fish species off the Arabian Sea coast of Oman for ongoing stock assessment of Omani fisheries, to guide development and investment decisions. The MFW is now engaging in the development of a coastal fishing fleet and the assessment of the most appropriate management approach for this fishery. The MFW‟s view is that the resource potential within the country‟s territorial waters (as indicated by the recent fisheries resource assessment survey), limited harvesting capacity, extent of technological advancement, and economic performance of the current traditional fleet, indicates that the current level of exploitation of fish resources is not optimal. Management proposals must therefore be developed in the context of the survey findings. Comparison will also be made with the resource assessment survey completed for the waters of the United Arab Emirates and the subsequent management initiatives developed in Abu Dhabi based on the results of the resource survey. Title: Resource Assessment Surveys As the Basis for Effective Fisheries Management Author: Shallard, Bruce, Al-Oufi, Hamed Said, Bose, Shekar This paper discusses the use of resource assessment surveys as the basis for effective fisheries management drawing on the resource assessment survey of the Arabian Sea coast of Oman. This survey, completed in 2009, has been undertaken in the context of the primary aim of the Oman Ministry of Fisheries Wealth (MFW) being to ensure that fisheries are developed and managed for the advantage of the people of Oman in a manner that is sustainable, maintains biodiversity and is consistent with the Code of Conduct for Responsible Fisheries. The goal of the survey was to provide estimates of the fishable biomass of principal demersal, small pelagic and mesopelagic fish species off the Arabian Sea coast of Oman for ongoing stock assessment of Omani fisheries, to guide development and investment decisions. The MFW is now engaging in the development of a coastal fishing fleet and the assessment of the most appropriate management approach for this fishery. The MFW‟s view is that the resource potential within the country‟s territorial waters (as indicated by the recent fisheries resource assessment survey), limited harvesting capacity, extent of technological advancement, and economic performance of the current traditional fleet, indicates that the current level of exploitation of fish resources is not optimal. Management proposals must therefore be developed in the context of the survey findings. Comparison will also be made with the resource assessment survey completed for the waters of the United Arab Emirates and the subsequent management initiatives developed in Abu Dhabi based on the results of the resource survey. Close

• 33. [Article] The Cost of Avoiding Sea Cucumber Stock Depletion

  In 2013 a stock of sea cucumber (Isostichopus badionotus) was discovered in northern shelf of Yucatan. A survey calculated a biomass of 17,600 tons. The species has an attractive price for local fishers, ...

  Citation × Citation Citation Abstract Copy Title: The Cost of Avoiding Sea Cucumber Stock Depletion Author: Hernández-Flores, Alvaro, Cuevas-Jiménez, Alfonso, Aranda-Nah, Javier In 2013 a stock of sea cucumber (Isostichopus badionotus) was discovered in northern shelf of Yucatan. A survey calculated a biomass of 17,600 tons. The species has an attractive price for local fishers, therefore, in order to avoid the “race for sea cucumbers” and the collapse of the stock, authorities established a total quota of 1,278 tones, issued a limited number of permits and restricted the fishing season to six weeks. Because of fishers’ dynamic behavior and the installed local fishing capacity, the applied effort was higher than the authorized (750 boats per day). Regulations were not enough to avoid excess fishing and entry of non-authorized boats, driving the stock to a low level. We developed a spatial and density dependent bioeconomic model which calculates an optimum pathway to maximize the profits without putting the stock in peril. The model operates seasonally in the short-run. Because of catchability and cost depend on the sea cucumbers densities, both were modeled with asymptotic functions. In order to avoid the Allee effect, the species requires a minimum density of 0.1 individuals per square meter. Our results indicate that the maximum quota could be 5,700 tons, which is about 32% of the vulnerable biomass. This quota would produce profits of US$2,300,000. If minimum density were neglected, the system would lead the biomass to 8,400 tons, instead 11,000 tons, with extra profits of US$76,000; however, in such level the density would be 0.08 individual per square meter, reaching the Allee effect and impeding the stock recovery. Title: The Cost of Avoiding Sea Cucumber Stock Depletion Author: Hernández-Flores, Alvaro, Cuevas-Jiménez, Alfonso, Aranda-Nah, Javier In 2013 a stock of sea cucumber (Isostichopus badionotus) was discovered in northern shelf of Yucatan. A survey calculated a biomass of 17,600 tons. The species has an attractive price for local fishers, therefore, in order to avoid the “race for sea cucumbers” and the collapse of the stock, authorities established a total quota of 1,278 tones, issued a limited number of permits and restricted the fishing season to six weeks. Because of fishers’ dynamic behavior and the installed local fishing capacity, the applied effort was higher than the authorized (750 boats per day). Regulations were not enough to avoid excess fishing and entry of non-authorized boats, driving the stock to a low level. We developed a spatial and density dependent bioeconomic model which calculates an optimum pathway to maximize the profits without putting the stock in peril. The model operates seasonally in the short-run. Because of catchability and cost depend on the sea cucumbers densities, both were modeled with asymptotic functions. In order to avoid the Allee effect, the species requires a minimum density of 0.1 individuals per square meter. Our results indicate that the maximum quota could be 5,700 tons, which is about 32% of the vulnerable biomass. This quota would produce profits of US$2,300,000. If minimum density were neglected, the system would lead the biomass to 8,400 tons, instead 11,000 tons, with extra profits of US$76,000; however, in such level the density would be 0.08 individual per square meter, reaching the Allee effect and impeding the stock recovery. Close

• 34. [Article] An Economic Analysis of Low Value Species As An Alternative Nutritional Source In Strengthening Food Security In India

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: An Economic Analysis of Low Value Species As An Alternative Nutritional Source In Strengthening Food Security In India Author: Kodial, Harshini, Reddy, Muni Abstract only. Title: An Economic Analysis of Low Value Species As An Alternative Nutritional Source In Strengthening Food Security In India Author: Kodial, Harshini, Reddy, Muni Abstract only. Close

• 35. [Article] Structural Changes in Russian Seafood Consumption: An Econometric Analysis of Regional Herring Product Demand

  Russia is experiencing deep structural changes in many areas. For the seafood industry important developments are large increases in household incomes, development of modern super- and hypermarket distribution ...

  Citation × Citation Citation Abstract Copy Title: Structural Changes in Russian Seafood Consumption: An Econometric Analysis of Regional Herring Product Demand Author: Lien, Kristin, Tveteras, Sigbjørn, Tveteras, Ragnar Russia is experiencing deep structural changes in many areas. For the seafood industry important developments are large increases in household incomes, development of modern super- and hypermarket distribution channels, and product innovations. In the seafood category consumers are adopting new species and new product forms at a rapid rate. Herring is one of the species that is experiencing these changes. The dominant product form has traditionally been whole salted herring, typically sold at open markets. Herring sold in the traditional unprocessed form has been a protein source for poor people, consumed at home. But more processed and expensive product forms that are distributed through modern distribution channels have increased their market share during the data period. We employ a panel data set on monthly per capita demand for different herring products in six Russian regions, from unprocessed to value added products, to test hypotheses on the structure of herring consumption. We estimate dynamic panel data demand systems, with region-specific estimates of price and income elasticities. The six regions in the data set have large differences in average per capita income. Our econometric estimates indicate significant structural regional differences in per capita consumption of different products, also after controlling for income differences. We find that whole herring is generally an inferior good, whereas fillet herring products tend to be normal goods. This suggests that if incomes continue to increase, consumption will shift further from unprocessed to value added herring products. Title: Structural Changes in Russian Seafood Consumption: An Econometric Analysis of Regional Herring Product Demand Author: Lien, Kristin, Tveteras, Sigbjørn, Tveteras, Ragnar Russia is experiencing deep structural changes in many areas. For the seafood industry important developments are large increases in household incomes, development of modern super- and hypermarket distribution channels, and product innovations. In the seafood category consumers are adopting new species and new product forms at a rapid rate. Herring is one of the species that is experiencing these changes. The dominant product form has traditionally been whole salted herring, typically sold at open markets. Herring sold in the traditional unprocessed form has been a protein source for poor people, consumed at home. But more processed and expensive product forms that are distributed through modern distribution channels have increased their market share during the data period. We employ a panel data set on monthly per capita demand for different herring products in six Russian regions, from unprocessed to value added products, to test hypotheses on the structure of herring consumption. We estimate dynamic panel data demand systems, with region-specific estimates of price and income elasticities. The six regions in the data set have large differences in average per capita income. Our econometric estimates indicate significant structural regional differences in per capita consumption of different products, also after controlling for income differences. We find that whole herring is generally an inferior good, whereas fillet herring products tend to be normal goods. This suggests that if incomes continue to increase, consumption will shift further from unprocessed to value added herring products. Close

• 36. [Article] Evaluation of importance of Orinoco Sailfin Catfish (Pterygoplichthys multiradiatus) as a food source

  Presentation

  Citation × Citation Citation Abstract Copy Title: Evaluation of importance of Orinoco Sailfin Catfish (Pterygoplichthys multiradiatus) as a food source Author: Ahmad, Shakeela Begum Nasir, Jayawardena, J.H.K.N., Wickramasinghe, Indira, Jinadasa, Badigama Kamkanange Kolitha Kamal, Ariyarathna, Durayalage Suseema Presentation Title: Evaluation of importance of Orinoco Sailfin Catfish (Pterygoplichthys multiradiatus) as a food source Author: Ahmad, Shakeela Begum Nasir, Jayawardena, J.H.K.N., Wickramasinghe, Indira, Jinadasa, Badigama Kamkanange Kolitha Kamal, Ariyarathna, Durayalage Suseema Presentation Close

• 37. [Article] Comprehensive Fishery Wealth: A Bioeconomic, Ecosystem-Based Approach to Measuring Fisheries Sustainability

  Fisheries sustainability is a much sought-after goal. Yet, “sustainability” is often too ambiguously defined to be of much practical guidance to policymakers. Furthermore, fisheries managers are increasingly ...

  Citation × Citation Citation Abstract Copy Title: Comprehensive Fishery Wealth: A Bioeconomic, Ecosystem-Based Approach to Measuring Fisheries Sustainability Author: Fenichel, Eli P., Abbott, Joshua K. Fisheries sustainability is a much sought-after goal. Yet, “sustainability” is often too ambiguously defined to be of much practical guidance to policymakers. Furthermore, fisheries managers are increasingly expected to assess and manage fisheries in an “ecosystem-based” manner – accounting for the ecological interdependencies of species and their coupling with the physical environment. We build upon the green accounting and sustainable development literatures to downscale indices often used to measure sustainability at the nation-state scale to measure the current and projected future sustainability of exploited fishery ecosystems. We argue that the sustainability of a fishery ecosystem can be assessed by whether the properly measured value of the natural, physical and human capital stocks embodied within the fishery (i.e., the comprehensive fishery wealth) is non-decreasing over time. We extend our published work (Fenichel and Abbott 2014) to show how ecosystem models of fisheries can be integrated with bioeconomic models of human “predators’” responses to changes in multispecies fish stocks and policy to provide rigorous “shadow prices” for all species within the system and fishing capital. These prices can then be multiplied by their associated capital stocks to provide an index of inclusive fishery wealth. Changes in this index (i.e., comprehensive investment) allow managers to assess the ability of past and current fishery management regimes to maintain wealth within the fishery for future generations. Finally, we show how our wealth accounting approach – when coupled with ecosystem-based bioeconomic models – can be leveraged to prospectively evaluate the sustainability and efficiency of alternative management approaches. Title: Comprehensive Fishery Wealth: A Bioeconomic, Ecosystem-Based Approach to Measuring Fisheries Sustainability Author: Fenichel, Eli P., Abbott, Joshua K. Fisheries sustainability is a much sought-after goal. Yet, “sustainability” is often too ambiguously defined to be of much practical guidance to policymakers. Furthermore, fisheries managers are increasingly expected to assess and manage fisheries in an “ecosystem-based” manner – accounting for the ecological interdependencies of species and their coupling with the physical environment. We build upon the green accounting and sustainable development literatures to downscale indices often used to measure sustainability at the nation-state scale to measure the current and projected future sustainability of exploited fishery ecosystems. We argue that the sustainability of a fishery ecosystem can be assessed by whether the properly measured value of the natural, physical and human capital stocks embodied within the fishery (i.e., the comprehensive fishery wealth) is non-decreasing over time. We extend our published work (Fenichel and Abbott 2014) to show how ecosystem models of fisheries can be integrated with bioeconomic models of human “predators’” responses to changes in multispecies fish stocks and policy to provide rigorous “shadow prices” for all species within the system and fishing capital. These prices can then be multiplied by their associated capital stocks to provide an index of inclusive fishery wealth. Changes in this index (i.e., comprehensive investment) allow managers to assess the ability of past and current fishery management regimes to maintain wealth within the fishery for future generations. Finally, we show how our wealth accounting approach – when coupled with ecosystem-based bioeconomic models – can be leveraged to prospectively evaluate the sustainability and efficiency of alternative management approaches. Close

• 38. [Article] Integrated assessment of the coastal fishery production systems in French Guiana

  Abstract only

  Citation × Citation Citation Abstract Copy Title: Integrated assessment of the coastal fishery production systems in French Guiana Author: Ahad Cisse, Abdoul, Blanchard, Fabian, Guyader, Olivier Abstract only Title: Integrated assessment of the coastal fishery production systems in French Guiana Author: Ahad Cisse, Abdoul, Blanchard, Fabian, Guyader, Olivier Abstract only Close

• 39. [Article] The Effects of Derelict Gear on Blue Crab Production in the Chesapeake Bay

  Several factors currently threaten blue crab (Callinectes sapidus) in the Chesapeake Bay. In addition to poor water quality, degraded habitat, and shifting environmental conditions, derelict gear has recently ...

  Citation × Citation Citation Abstract Copy Title: The Effects of Derelict Gear on Blue Crab Production in the Chesapeake Bay Author: Bilkovic, Donna M., Scheld, Andrew M., Havens, Kirk J. Several factors currently threaten blue crab (Callinectes sapidus) in the Chesapeake Bay. In addition to poor water quality, degraded habitat, and shifting environmental conditions, derelict gear has recently been recognized as a significant source of mortality for this economically and culturally significant species. From 2008 through 2014, commercial watermen in Virginia were hired during their winter off season to locate, document, and remove derelict gear as part of a larger research effort to determine the biological impacts of marine debris in the Chesapeake Bay. Data on derelict gear removal generated by this research was subsequently paired with spatially resolved catch and effort data and entered into a translog production model used to estimate the economic effects of derelict gear on commercial blue crab production. Model results indicate removal significantly improved pot production and economic profits, a finding which had been previously confounded by concurrent blue crab management action. Our research builds on previous work through explicit acknowledgment of important spatial production differences and incorporation of derelict gear removal. Title: The Effects of Derelict Gear on Blue Crab Production in the Chesapeake Bay Author: Bilkovic, Donna M., Scheld, Andrew M., Havens, Kirk J. Several factors currently threaten blue crab (Callinectes sapidus) in the Chesapeake Bay. In addition to poor water quality, degraded habitat, and shifting environmental conditions, derelict gear has recently been recognized as a significant source of mortality for this economically and culturally significant species. From 2008 through 2014, commercial watermen in Virginia were hired during their winter off season to locate, document, and remove derelict gear as part of a larger research effort to determine the biological impacts of marine debris in the Chesapeake Bay. Data on derelict gear removal generated by this research was subsequently paired with spatially resolved catch and effort data and entered into a translog production model used to estimate the economic effects of derelict gear on commercial blue crab production. Model results indicate removal significantly improved pot production and economic profits, a finding which had been previously confounded by concurrent blue crab management action. Our research builds on previous work through explicit acknowledgment of important spatial production differences and incorporation of derelict gear removal. Close

• 40. [Article] The Role of Recreational Fisher Modelling in the Assessment of Management Options for Australia's West Coast Demersal Fishery

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: The Role of Recreational Fisher Modelling in the Assessment of Management Options for Australia's West Coast Demersal Fishery Author: Lindner, Robert, McElroy, Seamus Abstract only. Title: The Role of Recreational Fisher Modelling in the Assessment of Management Options for Australia's West Coast Demersal Fishery Author: Lindner, Robert, McElroy, Seamus Abstract only. Close