Search

Search Results

• 1. [Article] Participatory Approach to Fishing Crafts Building in Post Tsunami Scenario

  Power Point presentation.

  Citation × Citation Citation Abstract Copy Title: Participatory Approach to Fishing Crafts Building in Post Tsunami Scenario Author: Gunasekara, Jayantha, Rathnaweera, Erwin Power Point presentation. Title: Participatory Approach to Fishing Crafts Building in Post Tsunami Scenario Author: Gunasekara, Jayantha, Rathnaweera, Erwin Power Point presentation. Close

• 2. [Article] International fish trade and fish product security in Viet Nam

  In 2006, Viet Nam’s fishery sector contributed about 6.1 percent to the GDP of the country and the value of aquatic products in export turnover was about US$ 3.3 billion. This accounted for 9-10 percent ...

  Citation × Citation Citation Abstract Copy Title: International fish trade and fish product security in Viet Nam Author: Kim, Anh Nguyen Thi, Hien, Thi Tran, Petersen, Elizabeth In 2006, Viet Nam’s fishery sector contributed about 6.1 percent to the GDP of the country and the value of aquatic products in export turnover was about US$ 3.3 billion. This accounted for 9-10 percent of the country’s total export value (MOFI/USDAFAS, 2007). Home consumption of fish has increased from 11.8 kg per capital year in 1993, to 13.5 kg per year in 1995 and is now estimated at more than 19 kg per year (FAO/MOFI, 2003). Fish is the most important source of animal protein contributing 40 percent to the total animal protein intake, and is supporting the people’s food security (MOFI, 2007). This paper shows how international fish trade impacts on fish product security in Viet Nam and presents ideas to improve fish product security for domestic and overseas markets. It focuses on how the Viet Nam Government can influence domestic fish product security in the following ways: 1) policies, 2) support activities contributing to fish security and sustainable development, and 3) encouraging international cooperation in the sector of fish product security. Title: International fish trade and fish product security in Viet Nam Author: Kim, Anh Nguyen Thi, Hien, Thi Tran, Petersen, Elizabeth In 2006, Viet Nam’s fishery sector contributed about 6.1 percent to the GDP of the country and the value of aquatic products in export turnover was about US$ 3.3 billion. This accounted for 9-10 percent of the country’s total export value (MOFI/USDAFAS, 2007). Home consumption of fish has increased from 11.8 kg per capital year in 1993, to 13.5 kg per year in 1995 and is now estimated at more than 19 kg per year (FAO/MOFI, 2003). Fish is the most important source of animal protein contributing 40 percent to the total animal protein intake, and is supporting the people’s food security (MOFI, 2007). This paper shows how international fish trade impacts on fish product security in Viet Nam and presents ideas to improve fish product security for domestic and overseas markets. It focuses on how the Viet Nam Government can influence domestic fish product security in the following ways: 1) policies, 2) support activities contributing to fish security and sustainable development, and 3) encouraging international cooperation in the sector of fish product security. Close

• 3. [Article] Developing Policies to combat IUU fishing in the Asia-Pacific region

  Power Point presentation.

  Citation × Citation Citation Abstract Copy Title: Developing Policies to combat IUU fishing in the Asia-Pacific region Author: Meere, Frank Power Point presentation. Title: Developing Policies to combat IUU fishing in the Asia-Pacific region Author: Meere, Frank Power Point presentation. Close

• 4. [Article] Fishing Revenue, Productivity and Product Choice in the Alaska Pollock Fishery

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: Fishing Revenue, Productivity and Product Choice in the Alaska Pollock Fishery Author: Paul, Catherine Morrison, Felthoven, Ronald, Torres, Marcelo Abstract only. Title: Fishing Revenue, Productivity and Product Choice in the Alaska Pollock Fishery Author: Paul, Catherine Morrison, Felthoven, Ronald, Torres, Marcelo Abstract only. Close

• 5. [Article] Small versus Large-Scale Fishing Operations in the Azores Archipelago

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: Small versus Large-Scale Fishing Operations in the Azores Archipelago Author: Carvalho, Natacha Abstract only. Title: Small versus Large-Scale Fishing Operations in the Azores Archipelago Author: Carvalho, Natacha Abstract only. Close

• 6. [Article] The mixed bless of modern fishing technology

  This paper formulates a simple biomass growth model of a fishery. The property rights regime is of the unregulated local common property type with a fixed number of fishermen and where the fish stock is ...

  Citation × Citation Citation Abstract Copy Title: The mixed bless of modern fishing technology Author: Skonhoft, Anders This paper formulates a simple biomass growth model of a fishery. The property rights regime is of the unregulated local common property type with a fixed number of fishermen and where the fish stock is exploited in a myopic profit-maximizing manner. Within this resource management setting it is demonstrated that more modern fishing technology has a two-sided profitability effect, and where the direct, short-run, positive effect is counterbalanced by a negative, long-run, indirect effect that slows down the stock growth and increases the harvesting costs. In the steady state, it is shown that more modern technology dissipates the rent under already high exploitation pressure, while the opposite occurs if the fish stock is initially little, or moderately, exploited. This is the mixed bless of modern fishing technology. Title: The mixed bless of modern fishing technology Author: Skonhoft, Anders This paper formulates a simple biomass growth model of a fishery. The property rights regime is of the unregulated local common property type with a fixed number of fishermen and where the fish stock is exploited in a myopic profit-maximizing manner. Within this resource management setting it is demonstrated that more modern fishing technology has a two-sided profitability effect, and where the direct, short-run, positive effect is counterbalanced by a negative, long-run, indirect effect that slows down the stock growth and increases the harvesting costs. In the steady state, it is shown that more modern technology dissipates the rent under already high exploitation pressure, while the opposite occurs if the fish stock is initially little, or moderately, exploited. This is the mixed bless of modern fishing technology. Close

• 7. [Article] Why and When Joint 'Exploitation-Ecosystem Dynamics' Models Should be Used

  Fisheries models are generally built to assess the dynamics of a resource with a given fishing mortality which level can be decided by some “decision maker” and/or which can be an observed process, e.g. ...

  Citation × Citation Citation Abstract Copy Title: Why and When Joint 'Exploitation-Ecosystem Dynamics' Models Should be Used Author: Laloë, Francis Fisheries models are generally built to assess the dynamics of a resource with a given fishing mortality which level can be decided by some “decision maker” and/or which can be an observed process, e.g. times series proportional to some observed values of fishing effort. In these cases, the resource dynamics is represented “conditionally to” fishing mortality. This mortality must be therefore primarily defined in reference to the definition of the resource Such models can be used to make stock assessment from historical data and to find which fishing mortality values could lead to some objective that can be some optimal or acceptable situation. If the values of fishing mortality can be decided by some unique institution, this knowledge of “best or acceptable mortality values” is of great interest for decision support. If not, it becomes insufficient to identify which decision of which institution could lead to obtain some given set of fishing mortalities. This situation may arise if there is a high number of fishing units belonging to various fishing fleets that may decide to generate fishing mortalities distributions among several available possibilities, according to their own interest. Examples of such problems will be presented from a Senegalese case study where several fishing fleets harvest on a common multispecies resource. Some other examples will be given from case studies identified in the context of the program ECOST with the development of a generic model which represents the joint dynamics of fishing activity and resource. Title: Why and When Joint 'Exploitation-Ecosystem Dynamics' Models Should be Used Author: Laloë, Francis Fisheries models are generally built to assess the dynamics of a resource with a given fishing mortality which level can be decided by some “decision maker” and/or which can be an observed process, e.g. times series proportional to some observed values of fishing effort. In these cases, the resource dynamics is represented “conditionally to” fishing mortality. This mortality must be therefore primarily defined in reference to the definition of the resource Such models can be used to make stock assessment from historical data and to find which fishing mortality values could lead to some objective that can be some optimal or acceptable situation. If the values of fishing mortality can be decided by some unique institution, this knowledge of “best or acceptable mortality values” is of great interest for decision support. If not, it becomes insufficient to identify which decision of which institution could lead to obtain some given set of fishing mortalities. This situation may arise if there is a high number of fishing units belonging to various fishing fleets that may decide to generate fishing mortalities distributions among several available possibilities, according to their own interest. Examples of such problems will be presented from a Senegalese case study where several fishing fleets harvest on a common multispecies resource. Some other examples will be given from case studies identified in the context of the program ECOST with the development of a generic model which represents the joint dynamics of fishing activity and resource. Close

• 8. [Article] The Economic Loss in Thai Fisheries

  Main fishing gear in Thailand was otter board trawls. More than 70% of the total Thai fishing vessels had been using this fishing gear, as well as push net which was restricted targeting for demersal resources. ...

  Citation × Citation Citation Abstract Copy Title: The Economic Loss in Thai Fisheries Author: Tokrisna, Ruangrai Main fishing gear in Thailand was otter board trawls. More than 70% of the total Thai fishing vessels had been using this fishing gear, as well as push net which was restricted targeting for demersal resources. Due to the 2.5 cm fine mesh size, juvenile economic species had been caught and sold as trash fish. Another important fishing gear which had conflict in utilization of fishery resources in Thailand was anchovy fishery, also using fine mesh size incurring by catches of juvenile economic species sold as trash fish. Von Bertalanffy growth function and length-weight relationship were employed in estimating the economic losses of these by catches of juvenile economic species. The loss of these economic species was estimated to be 10.82% of the usual fishing cost in case of anchovy purse seiner while it could be as high as 25.55% in case of light luring anchovy purse seine. For otter board trawler, this loss was estimated as high as 90.42% of the fishing cost, while they were 19.64% and 816.84% in case of push netters. Title: The Economic Loss in Thai Fisheries Author: Tokrisna, Ruangrai Main fishing gear in Thailand was otter board trawls. More than 70% of the total Thai fishing vessels had been using this fishing gear, as well as push net which was restricted targeting for demersal resources. Due to the 2.5 cm fine mesh size, juvenile economic species had been caught and sold as trash fish. Another important fishing gear which had conflict in utilization of fishery resources in Thailand was anchovy fishery, also using fine mesh size incurring by catches of juvenile economic species sold as trash fish. Von Bertalanffy growth function and length-weight relationship were employed in estimating the economic losses of these by catches of juvenile economic species. The loss of these economic species was estimated to be 10.82% of the usual fishing cost in case of anchovy purse seiner while it could be as high as 25.55% in case of light luring anchovy purse seine. For otter board trawler, this loss was estimated as high as 90.42% of the fishing cost, while they were 19.64% and 816.84% in case of push netters. Close

• 9. [Article] Fishing in a Shallow Lake: A Case for Effort Controls?

  In many situation, fishing activity adversely impacts the state of the marine ecosystem, impacts which feed back to affect fish stocks. Some ecosystems appear to have multiple equilibria and exhibit hysteresis, ...

  Citation × Citation Citation Abstract Copy Title: Fishing in a Shallow Lake: A Case for Effort Controls? Author: Janmaat, John, Ruijs, Arjan In many situation, fishing activity adversely impacts the state of the marine ecosystem, impacts which feed back to affect fish stocks. Some ecosystems appear to have multiple equilibria and exhibit hysteresis, whereby they can become stuck in low productivity states. We show how adding ecosystem dynamics to a classic fisheries model can introduce hysteresis impacts, impacts that affect both the evolution of the fish stock and the fishery harvesting it. We demonstrate that harvest and effort taxes are not equivalent instruments for controlling this externality. We also show that if the fishery is sufficiently degraded, it may not be optimal to move the system back to a healthy environment. Title: Fishing in a Shallow Lake: A Case for Effort Controls? Author: Janmaat, John, Ruijs, Arjan In many situation, fishing activity adversely impacts the state of the marine ecosystem, impacts which feed back to affect fish stocks. Some ecosystems appear to have multiple equilibria and exhibit hysteresis, whereby they can become stuck in low productivity states. We show how adding ecosystem dynamics to a classic fisheries model can introduce hysteresis impacts, impacts that affect both the evolution of the fish stock and the fishery harvesting it. We demonstrate that harvest and effort taxes are not equivalent instruments for controlling this externality. We also show that if the fishery is sufficiently degraded, it may not be optimal to move the system back to a healthy environment. Close

• 10. [Article] Comparing Energy intensity Results for Commercial Fisheries in France

  No poster available.

  Citation × Citation Citation Abstract Copy Title: Comparing Energy intensity Results for Commercial Fisheries in France Author: Dangeard, Isabelle, Le Floc'h, Pascal, Guyader, Olivier, Daures, Fabienne No poster available. Title: Comparing Energy intensity Results for Commercial Fisheries in France Author: Dangeard, Isabelle, Le Floc'h, Pascal, Guyader, Olivier, Daures, Fabienne No poster available. Close