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• 1. [Article] Recovering Aquatic Species at Risk: The valuation of management actions for incorporation into policy decisions

  The complex nature of policy decisions related to fisheries management actions undertaken for marine species protection results in policy makers frequently facing conflicting positions. For many management ...

  Citation × Citation Citation Abstract Copy Title: Recovering Aquatic Species at Risk: The valuation of management actions for incorporation into policy decisions Author: Forbes, Keldi, Boxall, Peter C., Solano Rivera, Catalina, Adamowicz, Vic The complex nature of policy decisions related to fisheries management actions undertaken for marine species protection results in policy makers frequently facing conflicting positions. For many management actions in Canada, a socio-economic impact assessment must be completed; this assessment estimates the impacts on the Canadian population. Two species-specific studies addressing the management of a Pacific Rockfish species and a Lake Sturgeon population were conducted for with the intent of estimating values for use in future analyses. Using conditional logit and latent class models, welfare measures were calculated for management actions related to each species; additionally, the impact of species’ characteristics, the protection program costs, and the demographic characteristics of the survey respondents were addressed. Title: Recovering Aquatic Species at Risk: The valuation of management actions for incorporation into policy decisions Author: Forbes, Keldi, Boxall, Peter C., Solano Rivera, Catalina, Adamowicz, Vic The complex nature of policy decisions related to fisheries management actions undertaken for marine species protection results in policy makers frequently facing conflicting positions. For many management actions in Canada, a socio-economic impact assessment must be completed; this assessment estimates the impacts on the Canadian population. Two species-specific studies addressing the management of a Pacific Rockfish species and a Lake Sturgeon population were conducted for with the intent of estimating values for use in future analyses. Using conditional logit and latent class models, welfare measures were calculated for management actions related to each species; additionally, the impact of species’ characteristics, the protection program costs, and the demographic characteristics of the survey respondents were addressed. Close

• 2. [Article] A Multivariate Poisson Approach to Estimating Target Catch and Bycatch Production

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: A Multivariate Poisson Approach to Estimating Target Catch and Bycatch Production Author: Stohs, Stephen, Hilger, James Abstract only. Title: A Multivariate Poisson Approach to Estimating Target Catch and Bycatch Production Author: Stohs, Stephen, Hilger, James Abstract only. Close

• 3. [Article] A Kalman Filter Approach to Estimating Marine Turtle Incidental Take Risk

  A principle U.S. fisheries management concern is ensuring compliance with Endangered Species Act requirements to limit incidental takes of listed species to levels which do not result in potential jeopardy ...

  Citation × Citation Citation Abstract Copy Title: A Kalman Filter Approach to Estimating Marine Turtle Incidental Take Risk Author: Stohs, Stephen, Kvamsdal, Sturla A principle U.S. fisheries management concern is ensuring compliance with Endangered Species Act requirements to limit incidental takes of listed species to levels which do not result in potential jeopardy to existing population stocks. Part of the risk assessment process involves an analysis of historic takes (bycatch) of ESA-listed species relative to fishing effort. Sample bycatch per unit of effort (BPUE) ratios are used to gauge the take risk to ESA-listed species posed by future fishing effort. The rare-event nature of protected species takes complicates the interpretation of sample BPUE ratios. For illustration, a total of 23 leatherback turtles were incidentally taken by fishermen in the California-Oregon drift gillnet fishery from the 1990 through 2006 fishing seasons in 7733 sets of fishing effort, with from 0 to 5 leatherback takes per season over the entire period. Should one conclude the incidental take risk was significantly higher during the season with 5 leatherback turtle takes than in seasons with 0 takes? To address this and related inference problems, we specify a state space model which describes the pattern of observed takes as a Poisson process conditional on the level of fishing effort. A time-varying Poisson rate parameter, expressed as BPUE, measures the time-varying level of take risk. A Kalman filter for Poisson processes is used to estimate the intertemporal variation in take risk from California-Oregon drift gillnet fishery observer data. A key question regards attributing the observed pattern of takes to randomness which drives fluctuations in observed takes versus intertemporal variation in the level of take risk. Title: A Kalman Filter Approach to Estimating Marine Turtle Incidental Take Risk Author: Stohs, Stephen, Kvamsdal, Sturla A principle U.S. fisheries management concern is ensuring compliance with Endangered Species Act requirements to limit incidental takes of listed species to levels which do not result in potential jeopardy to existing population stocks. Part of the risk assessment process involves an analysis of historic takes (bycatch) of ESA-listed species relative to fishing effort. Sample bycatch per unit of effort (BPUE) ratios are used to gauge the take risk to ESA-listed species posed by future fishing effort. The rare-event nature of protected species takes complicates the interpretation of sample BPUE ratios. For illustration, a total of 23 leatherback turtles were incidentally taken by fishermen in the California-Oregon drift gillnet fishery from the 1990 through 2006 fishing seasons in 7733 sets of fishing effort, with from 0 to 5 leatherback takes per season over the entire period. Should one conclude the incidental take risk was significantly higher during the season with 5 leatherback turtle takes than in seasons with 0 takes? To address this and related inference problems, we specify a state space model which describes the pattern of observed takes as a Poisson process conditional on the level of fishing effort. A time-varying Poisson rate parameter, expressed as BPUE, measures the time-varying level of take risk. A Kalman filter for Poisson processes is used to estimate the intertemporal variation in take risk from California-Oregon drift gillnet fishery observer data. A key question regards attributing the observed pattern of takes to randomness which drives fluctuations in observed takes versus intertemporal variation in the level of take risk. Close

• 4. [Article] Bycatch Risk Pools for the US West Coast Groundfish Fishery

  Abstract only

  Citation × Citation Citation Abstract Copy Title: Bycatch Risk Pools for the US West Coast Groundfish Fishery Author: Jannot, Jason, Holland, Daniel Abstract only Title: Bycatch Risk Pools for the US West Coast Groundfish Fishery Author: Jannot, Jason, Holland, Daniel Abstract only Close

• 5. [Article] Risk Assessment of the Mediterranean Seabass and Seabream industry in Greece: A Stochastic Simulation Approach Based on insurance Claims

  The Mediterranean finfish aquaculture is strongly represented from the successful industrial development of the mass production of the Mediterranean seabass (Dicentrarchus labrax) and seabream (Spaurus ...

  Citation × Citation Citation Abstract Copy Title: Risk Assessment of the Mediterranean Seabass and Seabream industry in Greece: A Stochastic Simulation Approach Based on insurance Claims Author: Tzovenis, Ioannis, Sorgeloos, Patrick, Viaene, Jacques, Theodorou, John A., Kotsonis, Antonios The Mediterranean finfish aquaculture is strongly represented from the successful industrial development of the mass production of the Mediterranean seabass (Dicentrarchus labrax) and seabream (Spaurus aurata), with Greece as the major producer country, contributing with approximately 57% of the global farmed production of both species. Despite the difficulty to obtain information from the private and public sector about the aquaculture insurance claims, the analysis of insurance data is necessary to develop a risk management strategy of the industry. The aim of the present work is to identify the major risks affecting the seabass/seabream aquaculture by examining qualitative and quantitative insurance claims from the early developmental stage (mid-80s) up to the maturation of the Greek sector (2000). A risk assessment based on scenario quantification and Monte Carlo Simulation with the ZHA WORKS 4.2 QUANT software is used to reveal percentile statistics of 1 Year/Worst out of x Years aggregate loss and thus to "harden" the basis for decision taking. The use of the past insurance experience provides forecasting trends for risk avoidance in the future and contributes to a strategy development for the sustainability of the sector. Title: Risk Assessment of the Mediterranean Seabass and Seabream industry in Greece: A Stochastic Simulation Approach Based on insurance Claims Author: Tzovenis, Ioannis, Sorgeloos, Patrick, Viaene, Jacques, Theodorou, John A., Kotsonis, Antonios The Mediterranean finfish aquaculture is strongly represented from the successful industrial development of the mass production of the Mediterranean seabass (Dicentrarchus labrax) and seabream (Spaurus aurata), with Greece as the major producer country, contributing with approximately 57% of the global farmed production of both species. Despite the difficulty to obtain information from the private and public sector about the aquaculture insurance claims, the analysis of insurance data is necessary to develop a risk management strategy of the industry. The aim of the present work is to identify the major risks affecting the seabass/seabream aquaculture by examining qualitative and quantitative insurance claims from the early developmental stage (mid-80s) up to the maturation of the Greek sector (2000). A risk assessment based on scenario quantification and Monte Carlo Simulation with the ZHA WORKS 4.2 QUANT software is used to reveal percentile statistics of 1 Year/Worst out of x Years aggregate loss and thus to "harden" the basis for decision taking. The use of the past insurance experience provides forecasting trends for risk avoidance in the future and contributes to a strategy development for the sustainability of the sector. Close

• 6. [Article] The Barents Sea red king crab invasion- risky business or good business?

  Abstract only

  Citation × Citation Citation Abstract Copy Title: The Barents Sea red king crab invasion- risky business or good business? Author: Falk-Petersen, Jannike Abstract only Title: The Barents Sea red king crab invasion- risky business or good business? Author: Falk-Petersen, Jannike Abstract only Close

• 7. [Article] Markets, Pooling and Insurance for Managing Incidental Catch In Fisheries

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: Markets, Pooling and Insurance for Managing Incidental Catch In Fisheries Author: Holland, Dan Abstract only. Title: Markets, Pooling and Insurance for Managing Incidental Catch In Fisheries Author: Holland, Dan Abstract only. Close

• 8. [Article] Long-Term Health Effects, Risk Perceptions, and Consumption Patterns for Aquacultured Seafood

  Presentation

  Citation × Citation Citation Abstract Copy Title: Long-Term Health Effects, Risk Perceptions, and Consumption Patterns for Aquacultured Seafood Author: Uchida, Hirotsugu, Johnston, Roberty, Roheim, Cathy Presentation Title: Long-Term Health Effects, Risk Perceptions, and Consumption Patterns for Aquacultured Seafood Author: Uchida, Hirotsugu, Johnston, Roberty, Roheim, Cathy Presentation Close

• 9. [Article] Yellowfin Tuna: A Global and Uk Supply Chain Analysis

  No poster available.

  Citation × Citation Citation Abstract Copy Title: Yellowfin Tuna: A Global and Uk Supply Chain Analysis Author: Brown, Adam, Garrett, Angus No poster available. Title: Yellowfin Tuna: A Global and Uk Supply Chain Analysis Author: Brown, Adam, Garrett, Angus No poster available. Close

• 10. [Article] Uncertainty and Risk in the Ecosystems Approach to Fisheries Management: Some Insights from an Ecosystem Computer Simulation Model

  Understanding the complexities of ecosystems is difficult enough, but when the human dimension is added to the inherent uncertainty and risk in fisheries management, the actual versus expected results ...

  Citation × Citation Citation Abstract Copy Title: Uncertainty and Risk in the Ecosystems Approach to Fisheries Management: Some Insights from an Ecosystem Computer Simulation Model Author: Ward, John, Metzner, Rebecca, DeYoung, Cassandra Understanding the complexities of ecosystems is difficult enough, but when the human dimension is added to the inherent uncertainty and risk in fisheries management, the actual versus expected results move from the counter-intuitive to the paradoxical. Without an adequate understanding of the interrelationships between ecosystem components, including the human dimension, scientific management becomes intuition-based management, which is often counterproductive to achieving desired goals and objectives. A computer simulation model is developed for multiple species, resource areas, stocks, and cohorts. To explicitly incorporate ecosystem effects predator-prey and competitor relationships are constructed to interpret interactions between different species of fish. Fishing fleet dynamics are captured by modeling multiple vessel classes based on specifications for catchability and concentration profiles. Additional uncertainty is included through the effects of market supply and demand on price for different discount rates. Economic impacts are also estimated for each point in time as biological and market conditions change. This simulation model results are then compared to determine if the management objective of maximization of net benefits subject to the fish stock conservation goal are achievable in an ecosystem context while also considering impacts on jobs, income, and sales. Insights from this simulation of an ecosystem should provide information on the needed research required for the ecosystem approach to fisheries management to be successful in achieving its multiple objectives. Title: Uncertainty and Risk in the Ecosystems Approach to Fisheries Management: Some Insights from an Ecosystem Computer Simulation Model Author: Ward, John, Metzner, Rebecca, DeYoung, Cassandra Understanding the complexities of ecosystems is difficult enough, but when the human dimension is added to the inherent uncertainty and risk in fisheries management, the actual versus expected results move from the counter-intuitive to the paradoxical. Without an adequate understanding of the interrelationships between ecosystem components, including the human dimension, scientific management becomes intuition-based management, which is often counterproductive to achieving desired goals and objectives. A computer simulation model is developed for multiple species, resource areas, stocks, and cohorts. To explicitly incorporate ecosystem effects predator-prey and competitor relationships are constructed to interpret interactions between different species of fish. Fishing fleet dynamics are captured by modeling multiple vessel classes based on specifications for catchability and concentration profiles. Additional uncertainty is included through the effects of market supply and demand on price for different discount rates. Economic impacts are also estimated for each point in time as biological and market conditions change. This simulation model results are then compared to determine if the management objective of maximization of net benefits subject to the fish stock conservation goal are achievable in an ecosystem context while also considering impacts on jobs, income, and sales. Insights from this simulation of an ecosystem should provide information on the needed research required for the ecosystem approach to fisheries management to be successful in achieving its multiple objectives. Close

• 11. [Article] Fleet coordination of catch under share-based management in the Central Gulf of Alaska groundfish fishery

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: Fleet coordination of catch under share-based management in the Central Gulf of Alaska groundfish fishery Author: Fina, Mark Abstract only. Title: Fleet coordination of catch under share-based management in the Central Gulf of Alaska groundfish fishery Author: Fina, Mark Abstract only. Close

• 12. [Article] Presentation of Dogmatis, An Inter and Multidisciplinary Programme for the Assessment of the Impacts of Genetically Modified Fish, and Results About Risk of fortuitous Import on French Market

  Poster session.

  Citation × Citation Citation Abstract Copy Title: Presentation of Dogmatis, An Inter and Multidisciplinary Programme for the Assessment of the Impacts of Genetically Modified Fish, and Results About Risk of fortuitous Import on French Market Author: Mariojouls, Catherine, Ngo, May-Ahn, Sohm, Frédéric, Pucheu, Elodie, Doussan, Isabelle, Mambrini, Muriel, Bertheau, Yves, Coutellec, Léo, Schmid, Anne Françoise, Barrey, Sandrine, Boy, Laurence Poster session. Title: Presentation of Dogmatis, An Inter and Multidisciplinary Programme for the Assessment of the Impacts of Genetically Modified Fish, and Results About Risk of fortuitous Import on French Market Author: Mariojouls, Catherine, Ngo, May-Ahn, Sohm, Frédéric, Pucheu, Elodie, Doussan, Isabelle, Mambrini, Muriel, Bertheau, Yves, Coutellec, Léo, Schmid, Anne Françoise, Barrey, Sandrine, Boy, Laurence Poster session. Close

• 13. [Article] Fishery Management When Biological and Economic Disturbances Are Correlated

  Economists studying the management of fisheries have universally assumed disturbances affecting harvest costs are unrelated to disturbances affecting biological growth. This paper gives examples of commercially ...

  Citation × Citation Citation Abstract Copy Title: Fishery Management When Biological and Economic Disturbances Are Correlated Author: Kennedy, Chris J. Economists studying the management of fisheries have universally assumed disturbances affecting harvest costs are unrelated to disturbances affecting biological growth. This paper gives examples of commercially valuable species that are impacted reproductively and behaviorally by a single environmental variable (e.g., temperature), leading to correlated disturbances in current marginal harvest costs and future biological growth. A general analytical model examines the importance of considering correlated disturbances when choosing optimal escapement targets, and shows how the presence of correlation affects the value of waiting for information on harvest costs. These results give insight as to the appropriate use of "self-correcting" mechanisms for controlling harvest, such as landing fees, versus hard targets, and provide a framework for proactive management of fisheries in the face of large-scale marine disturbances that can affect both the biological growth and behavior of commercially valuable species. Title: Fishery Management When Biological and Economic Disturbances Are Correlated Author: Kennedy, Chris J. Economists studying the management of fisheries have universally assumed disturbances affecting harvest costs are unrelated to disturbances affecting biological growth. This paper gives examples of commercially valuable species that are impacted reproductively and behaviorally by a single environmental variable (e.g., temperature), leading to correlated disturbances in current marginal harvest costs and future biological growth. A general analytical model examines the importance of considering correlated disturbances when choosing optimal escapement targets, and shows how the presence of correlation affects the value of waiting for information on harvest costs. These results give insight as to the appropriate use of "self-correcting" mechanisms for controlling harvest, such as landing fees, versus hard targets, and provide a framework for proactive management of fisheries in the face of large-scale marine disturbances that can affect both the biological growth and behavior of commercially valuable species. Close

• 14. [Article] A Stochastic Viability Approach for Ecosystem-Based Management of Mixed Fisheries: The Case of The Bay of Biscay Demersal Fisheries

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: A Stochastic Viability Approach for Ecosystem-Based Management of Mixed Fisheries: The Case of The Bay of Biscay Demersal Fisheries Author: Gourguet, Sophie, Doyen, Luc, Thébaud, Olivier, Macher, Claire, Guyader, Olivier Abstract only. Title: A Stochastic Viability Approach for Ecosystem-Based Management of Mixed Fisheries: The Case of The Bay of Biscay Demersal Fisheries Author: Gourguet, Sophie, Doyen, Luc, Thébaud, Olivier, Macher, Claire, Guyader, Olivier Abstract only. Close

• 15. [Article] Modeling the stochastic dynamics of the aggregate stock in collapsed fisheries: the case of the northern cod

  Abstract Only

  Citation × Citation Citation Abstract Copy Title: Modeling the stochastic dynamics of the aggregate stock in collapsed fisheries: the case of the northern cod Author: Maroto, Jose Abstract Only Title: Modeling the stochastic dynamics of the aggregate stock in collapsed fisheries: the case of the northern cod Author: Maroto, Jose Abstract Only Close

• 16. [Article] An Empirical Analysis of Portfolio Management as a Tool for Implementing Ecosystem-Based Fishery Management

  presentation

  Citation × Citation Citation Abstract Copy Title: An Empirical Analysis of Portfolio Management as a Tool for Implementing Ecosystem-Based Fishery Management Author: Jin, Di, Hoagland, Porter, DePiper, Geret presentation Title: An Empirical Analysis of Portfolio Management as a Tool for Implementing Ecosystem-Based Fishery Management Author: Jin, Di, Hoagland, Porter, DePiper, Geret presentation Close

• 17. [Article] The Economics of Norwegian Salmon Farming: A Review of 30 years of Production Growth

  Power Point presentation.

  Citation × Citation Citation Abstract Copy Title: The Economics of Norwegian Salmon Farming: A Review of 30 years of Production Growth Author: Rødseth, Kenneth Løvold, Guttormsen, Atle G. Power Point presentation. Title: The Economics of Norwegian Salmon Farming: A Review of 30 years of Production Growth Author: Rødseth, Kenneth Løvold, Guttormsen, Atle G. Power Point presentation. Close

• 18. [Article] Minimising Conflicts in Mixed-Fisheries Management Using Flexible Harvest Control Rules

  presentation

  Citation × Citation Citation Abstract Copy Title: Minimising Conflicts in Mixed-Fisheries Management Using Flexible Harvest Control Rules Author: Hoff, Ayoe, Vermard, Youen, Ulrich, Clara, Dolder, Paul, Poos, Jan-Jaap, Rindorf, Anna, Kempf, Alexander presentation Title: Minimising Conflicts in Mixed-Fisheries Management Using Flexible Harvest Control Rules Author: Hoff, Ayoe, Vermard, Youen, Ulrich, Clara, Dolder, Paul, Poos, Jan-Jaap, Rindorf, Anna, Kempf, Alexander presentation Close

• 19. [Article] Risk Analysis in Setting Allowable Harvests: Annual Catch Limits under the Magnuson Stevens Reauthorization Act

  Under the reauthorized Magnuson-Stevens Act (MSRA), US fisheries management councils must specify an annual catch limit (ACL) for each managed species and institute accountability measures (AMs) to ensure ...

  Citation × Citation Citation Abstract Copy Title: Risk Analysis in Setting Allowable Harvests: Annual Catch Limits under the Magnuson Stevens Reauthorization Act Author: Semmens, Kathryn Alese, Anderson, Lee G. Under the reauthorized Magnuson-Stevens Act (MSRA), US fisheries management councils must specify an annual catch limit (ACL) for each managed species and institute accountability measures (AMs) to ensure that actual harvest will not cause the stock to be overfished. While the details of implementation are still being developed, a set of Proposed Guidelines for performing ACL analysis has been developed. The purpose of this paper is to provide a preliminary assessment of these guidelines. The MSRA specifies two principles to be used as a framework for determining how Councils can comply with the ACL and AM measures. Both deal with uncertainty in the overall fisheries management process. The first is the separation between science and policy in setting the upper level on allowable harvests. The second is the requirement to take strong management actions to ensure that, given real world enforcement issues, the actual harvest in any year does not surpass the allowable harvest level. The procedure for applying the principles is quite complex and it goes beyond a strict interpretation of the written language in the law. However, it is consistent with current procedures and with commonly accepted principles in fisheries management policy. The Proposed Guidelines suggest that a distinction be made between scientific and implementation uncertainty. While the distinction may follow from the two principles, a preliminary look at the logical process of developing the required control rules for specifying Acceptable Biological Catch and Annual Catch Targets raises questions about the usefulness of this distinction in actual policy analysis. Title: Risk Analysis in Setting Allowable Harvests: Annual Catch Limits under the Magnuson Stevens Reauthorization Act Author: Semmens, Kathryn Alese, Anderson, Lee G. Under the reauthorized Magnuson-Stevens Act (MSRA), US fisheries management councils must specify an annual catch limit (ACL) for each managed species and institute accountability measures (AMs) to ensure that actual harvest will not cause the stock to be overfished. While the details of implementation are still being developed, a set of Proposed Guidelines for performing ACL analysis has been developed. The purpose of this paper is to provide a preliminary assessment of these guidelines. The MSRA specifies two principles to be used as a framework for determining how Councils can comply with the ACL and AM measures. Both deal with uncertainty in the overall fisheries management process. The first is the separation between science and policy in setting the upper level on allowable harvests. The second is the requirement to take strong management actions to ensure that, given real world enforcement issues, the actual harvest in any year does not surpass the allowable harvest level. The procedure for applying the principles is quite complex and it goes beyond a strict interpretation of the written language in the law. However, it is consistent with current procedures and with commonly accepted principles in fisheries management policy. The Proposed Guidelines suggest that a distinction be made between scientific and implementation uncertainty. While the distinction may follow from the two principles, a preliminary look at the logical process of developing the required control rules for specifying Acceptable Biological Catch and Annual Catch Targets raises questions about the usefulness of this distinction in actual policy analysis. Close

• 20. [Article] Precautionary Management of North-East Arctic Cod under Environmental and Evolutionary Change

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: Precautionary Management of North-East Arctic Cod under Environmental and Evolutionary Change Author: Hjermann, Dag, Kaitala, Veijo Abstract only. Title: Precautionary Management of North-East Arctic Cod under Environmental and Evolutionary Change Author: Hjermann, Dag, Kaitala, Veijo Abstract only. Close