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• 31. [Article] Optimization Model for the Oregon Ocean Shrimp Fishery

  Research Paper

  Citation × Citation Citation Abstract Copy Title: Optimization Model for the Oregon Ocean Shrimp Fishery Author: Sylvia, Gilbert, Gallagher, Charmaine Marie Research Paper Title: Optimization Model for the Oregon Ocean Shrimp Fishery Author: Sylvia, Gilbert, Gallagher, Charmaine Marie Research Paper Close

• 32. [Article] Economic Performance of offshore Fisheries - the Case of Trawling and Purse Seining in Ben Tre Province, Vietnam

  Poster session.

  Citation × Citation Citation Abstract Copy Title: Economic Performance of offshore Fisheries - the Case of Trawling and Purse Seining in Ben Tre Province, Vietnam Author: Nguyen, Kim Anh Thi, Nguyen, Dien Van Poster session. Title: Economic Performance of offshore Fisheries - the Case of Trawling and Purse Seining in Ben Tre Province, Vietnam Author: Nguyen, Kim Anh Thi, Nguyen, Dien Van Poster session. Close

• 33. [Article] Lessons From the Collapse of the Stock of Anchovy in the Bay of Biscay

  No poster available.

  Citation × Citation Citation Abstract Copy Title: Lessons From the Collapse of the Stock of Anchovy in the Bay of Biscay Author: Del Valle Erkiaga, Ikerne, Astorkiza, Kepa No poster available. Title: Lessons From the Collapse of the Stock of Anchovy in the Bay of Biscay Author: Del Valle Erkiaga, Ikerne, Astorkiza, Kepa No poster available. Close

• 34. [Article] Age Structure Metrics for Precautionary Management: Can Simpler Assessment Techniques Save Fish, Time, and Money?

  Stock assessment techniques currently used in the United States are extremely costly to implement, involve significant data requirements, and are inaccessible to all but a few stock assessment scientists. ...

  Citation × Citation Citation Abstract Copy Title: Age Structure Metrics for Precautionary Management: Can Simpler Assessment Techniques Save Fish, Time, and Money? Author: Harte, Michael, Heppell, Selina, Sylvia, Gil, Cusack, Christopher, Larkin, Sherry Stock assessment techniques currently used in the United States are extremely costly to implement, involve significant data requirements, and are inaccessible to all but a few stock assessment scientists. A systematic decrease in fishery yields and the designation of several species as overfished on the west coast of the United States have resulted in stricter protocols regarding sustainable fisheries management and the rebuilding of overfished stocks, including the need to set annual harvest limits for all exploited species. An alternative and simpler approach to stock assessment which could address this need is described and an evaluation framework set up. Although no results have been obtained to date, possible costs and benefits of incorporating this approach into fisheries management are discussed. Title: Age Structure Metrics for Precautionary Management: Can Simpler Assessment Techniques Save Fish, Time, and Money? Author: Harte, Michael, Heppell, Selina, Sylvia, Gil, Cusack, Christopher, Larkin, Sherry Stock assessment techniques currently used in the United States are extremely costly to implement, involve significant data requirements, and are inaccessible to all but a few stock assessment scientists. A systematic decrease in fishery yields and the designation of several species as overfished on the west coast of the United States have resulted in stricter protocols regarding sustainable fisheries management and the rebuilding of overfished stocks, including the need to set annual harvest limits for all exploited species. An alternative and simpler approach to stock assessment which could address this need is described and an evaluation framework set up. Although no results have been obtained to date, possible costs and benefits of incorporating this approach into fisheries management are discussed. Close

• 35. [Article] An Analysis of the Tuna-Mackerel Gillnet Fishery in Nha Trang, Vietnam

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: An Analysis of the Tuna-Mackerel Gillnet Fishery in Nha Trang, Vietnam Author: Nguyen, Tuan, Flaaten, Ola, Nguyen, Kim Anh Thi, Nguyen, Tram Anh Thi Abstract only. Title: An Analysis of the Tuna-Mackerel Gillnet Fishery in Nha Trang, Vietnam Author: Nguyen, Tuan, Flaaten, Ola, Nguyen, Kim Anh Thi, Nguyen, Tram Anh Thi Abstract only. Close

• 36. [Article] North-East Arctic Cod Model

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: North-East Arctic Cod Model Author: Ekerhovd, Nils-Arne Abstract only. Title: North-East Arctic Cod Model Author: Ekerhovd, Nils-Arne Abstract only. Close

• 37. [Article] Consumer Demand for Meat, Poultry and Seafood in Taiwan

  This study provides estimates of a complete demand elasticities matrix for meat, poultry, fishery fish, aquaculture fish, as well as shrimp and shell fish in Taiwan, using the linear approximate almost ...

  Citation × Citation Citation Abstract Copy Title: Consumer Demand for Meat, Poultry and Seafood in Taiwan Author: Lee, Hwang-Jaw Year: 2001 This study provides estimates of a complete demand elasticities matrix for meat, poultry, fishery fish, aquaculture fish, as well as shrimp and shell fish in Taiwan, using the linear approximate almost ideal demand system. Estimation is based on aggregate annual consumption data complied from Taiwan Food Balance Sheets during 1970-1998. The estimated own-price elasticities indicate meat, poultry and seafood are all price inelastic. The results reveal that expenditure effects are strong for meat and fishery fish. The estimated cross-price elasticities are generally small and most products are gross complements. In addition, the effects of household size and the ratio of population aged over 64 on animal products consumption are observed to be significant. Moreover, own-price and expenditure elasticities computed at selected years reveal a possible change in pattern of consumption behavior which, however, may require further statistical analysis. Title: Consumer Demand for Meat, Poultry and Seafood in Taiwan Author: Lee, Hwang-Jaw Year: 2001 This study provides estimates of a complete demand elasticities matrix for meat, poultry, fishery fish, aquaculture fish, as well as shrimp and shell fish in Taiwan, using the linear approximate almost ideal demand system. Estimation is based on aggregate annual consumption data complied from Taiwan Food Balance Sheets during 1970-1998. The estimated own-price elasticities indicate meat, poultry and seafood are all price inelastic. The results reveal that expenditure effects are strong for meat and fishery fish. The estimated cross-price elasticities are generally small and most products are gross complements. In addition, the effects of household size and the ratio of population aged over 64 on animal products consumption are observed to be significant. Moreover, own-price and expenditure elasticities computed at selected years reveal a possible change in pattern of consumption behavior which, however, may require further statistical analysis. Close

• 38. [Article] Sea Turtles of Bahia Magdalena, Baja California Sur, Mexico: Demand and Supply of an Endangered Species

  Sea turtles have historically been a primary resource for many of the coastal inhabitants of Bahia Magdalena, Baja California Sur, Mexico. Despite their endangered status and the implementation in 1990 ...

  Citation × Citation Citation Abstract Copy Title: Sea Turtles of Bahia Magdalena, Baja California Sur, Mexico: Demand and Supply of an Endangered Species Author: Garcia-Martinez, S., Nichols, W.J. Year: 2001 Sea turtles have historically been a primary resource for many of the coastal inhabitants of Bahia Magdalena, Baja California Sur, Mexico. Despite their endangered status and the implementation in 1990 of Mexican laws prohibiting the harvest of sea turtles, the demand for and the supply of these animals has persisted to some degree. To determine the current demand for sea turtles 122 surveys and 56 interviews were conducted (June 12th-30th, 1999) throughout the Bahia Magdalena region. Through a generalized least squares (GLS) analysis it was estimated that 35.7% of the variation in demand was explained by six independent variables. The GLS model shows that the family size, special occasions of consumption such as birthdays, and the decline in sea turtle populations positively affect the demand function. The person's occupation, monthly income, and the 1990 ban on sea turtle harvest negatively affect this demand. Ninety-four surveys and seventy interviews conducted in the region (July 24th-August 1st, 1999) were used to describe a supply function. The GLS estimation indicates that 27.8% of the variation in the supply of sea turtles in the bay is influenced by nine variables. Age, level of education, fishing practices, number of dependents, availability of sea turtles, and culture significantly affect the supply of sea turtles in the Bahia Magdalena region. Title: Sea Turtles of Bahia Magdalena, Baja California Sur, Mexico: Demand and Supply of an Endangered Species Author: Garcia-Martinez, S., Nichols, W.J. Year: 2001 Sea turtles have historically been a primary resource for many of the coastal inhabitants of Bahia Magdalena, Baja California Sur, Mexico. Despite their endangered status and the implementation in 1990 of Mexican laws prohibiting the harvest of sea turtles, the demand for and the supply of these animals has persisted to some degree. To determine the current demand for sea turtles 122 surveys and 56 interviews were conducted (June 12th-30th, 1999) throughout the Bahia Magdalena region. Through a generalized least squares (GLS) analysis it was estimated that 35.7% of the variation in demand was explained by six independent variables. The GLS model shows that the family size, special occasions of consumption such as birthdays, and the decline in sea turtle populations positively affect the demand function. The person's occupation, monthly income, and the 1990 ban on sea turtle harvest negatively affect this demand. Ninety-four surveys and seventy interviews conducted in the region (July 24th-August 1st, 1999) were used to describe a supply function. The GLS estimation indicates that 27.8% of the variation in the supply of sea turtles in the bay is influenced by nine variables. Age, level of education, fishing practices, number of dependents, availability of sea turtles, and culture significantly affect the supply of sea turtles in the Bahia Magdalena region. Close

• 39. [Article] International Management Strategies for a Migratory Fish Stock: A Bio-economic Simulation Model of the Norwegian Spring-spawning Herring Fishery

  In this paper, a three-country dynamic bio-economic model is presented and used to simulate catch levels, stock size and profit potential of alternative management strategies for the Norwegian spring-spawning ...

  Citation × Citation Citation Abstract Copy Title: International Management Strategies for a Migratory Fish Stock: A Bio-economic Simulation Model of the Norwegian Spring-spawning Herring Fishery Author: Gordon, Daniel V., Bjorndal, Trond, Lindroos, Marko, Kaitala, Veijo Year: 2001 In this paper, a three-country dynamic bio-economic model is presented and used to simulate catch levels, stock size and profit potential of alternative management strategies for the Norwegian spring-spawning herring fishery. Management of the herring fishery is complicated by the migratory behaviour of the species moving between coastal state zones and the high seas. The biological model is described by a discrete time age structured model and the economic model is described by a rent maximising model with constant price of herring and different costs of harvesting and efficiency levels for the different national fleets. The simulations are carried out over a 70-year period and show that the benefits of international cooperation far exceed the returns of a competitive open access fishery. Title: International Management Strategies for a Migratory Fish Stock: A Bio-economic Simulation Model of the Norwegian Spring-spawning Herring Fishery Author: Gordon, Daniel V., Bjorndal, Trond, Lindroos, Marko, Kaitala, Veijo Year: 2001 In this paper, a three-country dynamic bio-economic model is presented and used to simulate catch levels, stock size and profit potential of alternative management strategies for the Norwegian spring-spawning herring fishery. Management of the herring fishery is complicated by the migratory behaviour of the species moving between coastal state zones and the high seas. The biological model is described by a discrete time age structured model and the economic model is described by a rent maximising model with constant price of herring and different costs of harvesting and efficiency levels for the different national fleets. The simulations are carried out over a 70-year period and show that the benefits of international cooperation far exceed the returns of a competitive open access fishery. Close

• 40. [Article] The Development of a Bioeconomic Model for the Oregon Ocean Shrimp Fishery

  Selecting ‘optimal’ strategies to manage Oregon ocean shrimp is challenged by uncertain and variable natural mortality, recruitment, and growth. Fishery management is focused on measures to prevent long-term ...

  Citation × Citation Citation Abstract Copy Title: The Development of a Bioeconomic Model for the Oregon Ocean Shrimp Fishery Author: Sylvia, Gilbert, Hannah, Robert, Gallagher, Charmaine Marie Year: 2001 Selecting ‘optimal’ strategies to manage Oregon ocean shrimp is challenged by uncertain and variable natural mortality, recruitment, and growth. Fishery management is focused on measures to prevent long-term biological damage to the stock, to protect age-1 shrimp from overharvest and to sustain long term fishery benefits. Developing harvest strategies such as mesh size and season dates are complicated by economic factors including differences in output prices as a function of shrimp size. To address these questions economic information was integrated with biological data to develop static and dynamic bioeconomic models. Equilibrium biological yield per recruit and revenue per recruit models indicate that a delay in the season opening of this fishery would generate increased revenue as a result of shrimp growth and size-based price differentials. Results using a dynamic non-linear programming model indicate targeting fishing intensity later in the season can generate better yield and revenue. Sensitivity analysis indicates that higher rates of natural mortality will decrease the benefits of delaying the season opening. Future research will build on this analysis by including selectivity at length, variable recruitment, harvester and processor costs, and product quality. Title: The Development of a Bioeconomic Model for the Oregon Ocean Shrimp Fishery Author: Sylvia, Gilbert, Hannah, Robert, Gallagher, Charmaine Marie Year: 2001 Selecting ‘optimal’ strategies to manage Oregon ocean shrimp is challenged by uncertain and variable natural mortality, recruitment, and growth. Fishery management is focused on measures to prevent long-term biological damage to the stock, to protect age-1 shrimp from overharvest and to sustain long term fishery benefits. Developing harvest strategies such as mesh size and season dates are complicated by economic factors including differences in output prices as a function of shrimp size. To address these questions economic information was integrated with biological data to develop static and dynamic bioeconomic models. Equilibrium biological yield per recruit and revenue per recruit models indicate that a delay in the season opening of this fishery would generate increased revenue as a result of shrimp growth and size-based price differentials. Results using a dynamic non-linear programming model indicate targeting fishing intensity later in the season can generate better yield and revenue. Sensitivity analysis indicates that higher rates of natural mortality will decrease the benefits of delaying the season opening. Future research will build on this analysis by including selectivity at length, variable recruitment, harvester and processor costs, and product quality. Close