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• 41. [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

• 42. [Article] Production Efficiency of the Tuna fleet of Azores and Madeira: a technical and strategic analysis

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: Production Efficiency of the Tuna fleet of Azores and Madeira: a technical and strategic analysis Author: Dias, Joao, Mendonca, Marta Abstract only. Title: Production Efficiency of the Tuna fleet of Azores and Madeira: a technical and strategic analysis Author: Dias, Joao, Mendonca, Marta Abstract only. Close

• 43. [Article] Capture-based aquaculture - sustainable value adding to capture fisheries?

  Capture-based aquaculture (CBA) is an industry that utilizes wild-captured specimens as stocking animals for ongrowing or storage. This yields an intriguing direct link between capture fisheries and aquaculture ...

  Citation × Citation Citation Abstract Copy Title: Capture-based aquaculture - sustainable value adding to capture fisheries? Author: Dreyer, Bent, Hermansen, Oystein Capture-based aquaculture (CBA) is an industry that utilizes wild-captured specimens as stocking animals for ongrowing or storage. This yields an intriguing direct link between capture fisheries and aquaculture of these resources. Examples of CBA are collection of early life stages of many crustaceans and adolescent tunas for grow-out in aquaculture systems. Cod CBA competes with capture fisheries and closed-cycle aquaculture. This paper discusses value adding properties of these in order to evaluate the relative costs and value positions according to the Hunt and Morgan (1995) competitiveness matrix. CBA on cod is found to be in a superior value position and at a cost disadvantage. Advantages primarily stem from a quantitatively high yield, ability to supply during the lean season and large fish for sale. Higher capture, farming and slaughter costs are negative factors. Capture of juveniles for CBA imposes an externality on the capture fishery. When evaluating potential or ongoing CBA operations, this has to be taken into account. For cod CBA, this is internalized as cod for stocking has to be caught within regular quotas. Attention from economics and resource management research is scarce, as we find only one study that calculates the economic benefits from alternative uses of juveniles. FAO have proposed strict criteria for CBA evaluation. Our findings indicate that CBA can be economically preferable, even if not satisfying these criteria. Title: Capture-based aquaculture - sustainable value adding to capture fisheries? Author: Dreyer, Bent, Hermansen, Oystein Capture-based aquaculture (CBA) is an industry that utilizes wild-captured specimens as stocking animals for ongrowing or storage. This yields an intriguing direct link between capture fisheries and aquaculture of these resources. Examples of CBA are collection of early life stages of many crustaceans and adolescent tunas for grow-out in aquaculture systems. Cod CBA competes with capture fisheries and closed-cycle aquaculture. This paper discusses value adding properties of these in order to evaluate the relative costs and value positions according to the Hunt and Morgan (1995) competitiveness matrix. CBA on cod is found to be in a superior value position and at a cost disadvantage. Advantages primarily stem from a quantitatively high yield, ability to supply during the lean season and large fish for sale. Higher capture, farming and slaughter costs are negative factors. Capture of juveniles for CBA imposes an externality on the capture fishery. When evaluating potential or ongoing CBA operations, this has to be taken into account. For cod CBA, this is internalized as cod for stocking has to be caught within regular quotas. Attention from economics and resource management research is scarce, as we find only one study that calculates the economic benefits from alternative uses of juveniles. FAO have proposed strict criteria for CBA evaluation. Our findings indicate that CBA can be economically preferable, even if not satisfying these criteria. Close

• 44. [Article] Strategies for Market Inclusion of Small Scale Fish Farmers of the Tocantins State / Brazil

  presentation

  Citation × Citation Citation Abstract Copy Title: Strategies for Market Inclusion of Small Scale Fish Farmers of the Tocantins State / Brazil Author: Barroso, Renata, Prysthon, Adriano, Pedroza, Manoel, M. V. Flores, Roberto presentation Title: Strategies for Market Inclusion of Small Scale Fish Farmers of the Tocantins State / Brazil Author: Barroso, Renata, Prysthon, Adriano, Pedroza, Manoel, M. V. Flores, Roberto presentation Close

• 45. [Article] Value Chain Development for Tilapia and Catfish Products: Opportunities for Female Participation in Kenya

  Abstract Only. This is part of the IIFET Special Session on Markets and Value Chains for Small Aquaculture & Fisheries Enterprises with a Focus on Gender that took place on 17 July 2012 in Dar Es Salaam, ...

  Citation × Citation Citation Abstract Copy Title: Value Chain Development for Tilapia and Catfish Products: Opportunities for Female Participation in Kenya Author: Quagrainie, Kwamena Abstract Only. This is part of the IIFET Special Session on Markets and Value Chains for Small Aquaculture & Fisheries Enterprises with a Focus on Gender that took place on 17 July 2012 in Dar Es Salaam, Tanzania in conjunction with 16th IIFET Conference. The complete proceedings of this special session are available (http://aquafishcrsp.oregonstate.edu/Documents/Uploads/FileManager/IIFET%202012%20CRSP%20Session%20Proceedings%20Final_small.pdf) through the Aquaculture & Fisheries Collaborative Research Support Program gender web site, (http://aquafishcrsp.oregonstate.edu/Gender/). Title: Value Chain Development for Tilapia and Catfish Products: Opportunities for Female Participation in Kenya Author: Quagrainie, Kwamena Abstract Only. This is part of the IIFET Special Session on Markets and Value Chains for Small Aquaculture & Fisheries Enterprises with a Focus on Gender that took place on 17 July 2012 in Dar Es Salaam, Tanzania in conjunction with 16th IIFET Conference. The complete proceedings of this special session are available (http://aquafishcrsp.oregonstate.edu/Documents/Uploads/FileManager/IIFET%202012%20CRSP%20Session%20Proceedings%20Final_small.pdf) through the Aquaculture & Fisheries Collaborative Research Support Program gender web site, (http://aquafishcrsp.oregonstate.edu/Gender/). Close

• 46. [Article] Does Large-Scale offshore Aquaculture Farming in Western Australia Make Economic Sense? the Case of Yellowtail Kingfish

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: Does Large-Scale offshore Aquaculture Farming in Western Australia Make Economic Sense? the Case of Yellowtail Kingfish Author: McLeod, Paul, McElroy, Seamus Abstract only. Title: Does Large-Scale offshore Aquaculture Farming in Western Australia Make Economic Sense? the Case of Yellowtail Kingfish Author: McLeod, Paul, McElroy, Seamus Abstract only. Close

• 47. [Article] Characterization of the California Live Bait Fishery

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: Characterization of the California Live Bait Fishery Author: Hilger, James Abstract only. Title: Characterization of the California Live Bait Fishery Author: Hilger, James Abstract only. Close

• 48. [Article] Seafood Processing and Trade in Vietnam

  Research Paper

  Citation × Citation Citation Abstract Copy Title: Seafood Processing and Trade in Vietnam Author: Nguyen, Tram Anh Thi Research Paper Title: Seafood Processing and Trade in Vietnam Author: Nguyen, Tram Anh Thi Research Paper Close

• 49. [Article] Gender and Willingness-to-pay for Recreational Benefits from Water Quality Improvements

  The economics literature has recently turned its attention to the existence of gender differences in various aspects of choice behaviour. This paper focuses upon such differences as may exist in the valuation ...

  Citation × Citation Citation Abstract Copy Title: Gender and Willingness-to-pay for Recreational Benefits from Water Quality Improvements Author: Dupont, Diane P. Year: 2001 The economics literature has recently turned its attention to the existence of gender differences in various aspects of choice behaviour. This paper focuses upon such differences as may exist in the valuation of environmental resources. Firstly, the paper presents several reasons why women are expected to have a lower willingness-to-pay (WTP) for environmental improvements than do men. Secondly, in order to establish the empirical extent of gender differences the paper presents a model for estimating individual-specific benefits from environmental improvements. CVM referenda data from are collected and used in a double-bounded probit model to estimate female versus male WTP for remedial actions designed to improve three different water-based recreational activities in a previously highly polluted area. For these data, the paper finds that, even after controlling for income differences, women consistently have lower WTP values. The findings in this paper have potentially important consequences for the subsequent calculation of aggregate benefits from contingent valuation models that ignore the role of gender. Since women generally constitute about one half of a population base, turning a blind eye to gender means that aggregate WTP values will overstate the extent of benefits from environmental improvements. Title: Gender and Willingness-to-pay for Recreational Benefits from Water Quality Improvements Author: Dupont, Diane P. Year: 2001 The economics literature has recently turned its attention to the existence of gender differences in various aspects of choice behaviour. This paper focuses upon such differences as may exist in the valuation of environmental resources. Firstly, the paper presents several reasons why women are expected to have a lower willingness-to-pay (WTP) for environmental improvements than do men. Secondly, in order to establish the empirical extent of gender differences the paper presents a model for estimating individual-specific benefits from environmental improvements. CVM referenda data from are collected and used in a double-bounded probit model to estimate female versus male WTP for remedial actions designed to improve three different water-based recreational activities in a previously highly polluted area. For these data, the paper finds that, even after controlling for income differences, women consistently have lower WTP values. The findings in this paper have potentially important consequences for the subsequent calculation of aggregate benefits from contingent valuation models that ignore the role of gender. Since women generally constitute about one half of a population base, turning a blind eye to gender means that aggregate WTP values will overstate the extent of benefits from environmental improvements. Close

• 50. [Article] Market Power and the European Tuna Oligopsony: Implications for Fisheries and Trade

  Some recent studies have shown the outstanding price linkages at the global scale between the cannery-grade tuna markets over the last decade. When it comes to price transmission along the European value ...

  Citation × Citation Citation Abstract Copy Title: Market Power and the European Tuna Oligopsony: Implications for Fisheries and Trade Author: Mongruel, Rémi, Jiménez-Toribio, Ramon, Guillotreau, Patrice Some recent studies have shown the outstanding price linkages at the global scale between the cannery-grade tuna markets over the last decade. When it comes to price transmission along the European value chains, opposite results between the two major species (skipjack and yellowfin) are found: the market for final goods is actually segmented between the northern European countries consuming low-priced skipjack imported from Asia and the southern countries producing and importing yellowfin sold on their domestic markets at higher prices. If the former market is supposedly competitive, there is more suspicion of market power exercised on the latter. Through a structural and dynamic I.O. model already tested for other species in previous research, this paper explores the possible existence of market power exercised either by processors on the one hand (canned tuna sold in France) and/or by retailers on the other (French supermarkets). Some explanations are given in terms of industrial concentration for both processing and retailing industries and the marketing organisation itself. The high level of trade barriers protecting the European industry may also serve as a determining factor. Title: Market Power and the European Tuna Oligopsony: Implications for Fisheries and Trade Author: Mongruel, Rémi, Jiménez-Toribio, Ramon, Guillotreau, Patrice Some recent studies have shown the outstanding price linkages at the global scale between the cannery-grade tuna markets over the last decade. When it comes to price transmission along the European value chains, opposite results between the two major species (skipjack and yellowfin) are found: the market for final goods is actually segmented between the northern European countries consuming low-priced skipjack imported from Asia and the southern countries producing and importing yellowfin sold on their domestic markets at higher prices. If the former market is supposedly competitive, there is more suspicion of market power exercised on the latter. Through a structural and dynamic I.O. model already tested for other species in previous research, this paper explores the possible existence of market power exercised either by processors on the one hand (canned tuna sold in France) and/or by retailers on the other (French supermarkets). Some explanations are given in terms of industrial concentration for both processing and retailing industries and the marketing organisation itself. The high level of trade barriers protecting the European industry may also serve as a determining factor. Close