The Experts below are selected from a list of 1860 Experts worldwide ranked by ideXlab platform
James E. Kirkley - One of the best experts on this subject based on the ideXlab platform.
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Individual Transferable Quota Markets and Investment Decisions in the Fixed Gear Sablefish Industry
Journal of Environmental Economics and Management, 1994Co-Authors: Dale Squires, Mohammad Alauddin, James E. KirkleyAbstract:This paper presents an ex ante analysis of an individual transferable quota (ITQ) program imposed on one species in a Multispecies Fishery. Utilizing mathematical programming, pseudo data, and Tobit regression, market demand for quota and prospective gains in economic rent and efficiency gains from quota trade are assessed for the pot and longline sablefish fleet off the Pacific coast of the United States. Incentives for disinvestment and industry exit after quota exchange, implications for structure of the industry and ITQ market, and policy implications are examined.
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Production quota in multiproduct pacific fisheries
Journal of Environmental Economics and Management, 1991Co-Authors: Dale Squires, James E. KirkleyAbstract:Abstract Assessing the individual firm's technology and costs in a Multispecies Fishery allows design of a more effective output quota prior to regulation by anticipating and controlling for the firm's regulation-induced responses. An empirical study of a Pacific coast trawl Fishery indicates that the firm's flexibility of product decision is tightly constrained by its technology and cost structure. Hence, as the resource stock for the regulated species, sablefish, deteriorates and the trip quota progressively tightens, the firm cannot sufficiently reorganize its product bundle to preclude increasingly large sablefish disposal. This defeats the purpose of the production quota.
Patrick N. Halpin - One of the best experts on this subject based on the ideXlab platform.
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Temperature-based targeting in a Multispecies Fishery under climate change
Fisheries Oceanography, 2015Co-Authors: Daniel C. Dunn, Jerry Moxley, Patrick N. HalpinAbstract:Temperature controls important physiological processes in fish and determines aspects of their niches. In an effort to inform selective fishing and spatiotemporal management in the U.S. Northeast Multispecies Fishery, we used 16 years of data from the Northeast Fisheries Science Center Spring and Fall Scientific Trawl Surveys to determine if bottom temperature can be used to differentiate the distribution of Atlantic cod (Gadus morhua) from other species within the Fishery management plan (FMP). We identified two separate regimes in spring temperatures and used empirical cumulative distribution functions to calculate biomass availability by temperature for each species. We applied a bagged approach to find optimum thermal threshold values that maximize the difference in cod biomass from each of the other species. For our study area, 38% to 54% of the species considered were well separated from cod by temperature in spring, whereas only 17% were separable in the fall. This study suggests that temperature targeting can be used seasonally to separate cod from many other species in the FMP including top catches and no‐retention species. The use of temperature targeting may allow fishermen to better meet multiple quotas while avoiding choke species. Our results also suggested increasing thermal overlap between cod and species inhabiting higher median temperatures (e.g., spiny dogfish, Squalus acanthias) under the current warming temperature regime. These results indicate that the ability to selectively fish in the US Northeast Multispecies Fishery will become more difficult under a warming ocean.
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Empirical move-on rules to inform fishing strategies: a New England case study
Fish and Fisheries, 2013Co-Authors: Daniel C. Dunn, Andre Boustany, Jason J. Roberts, Eric Brazer, Melissa Sanderson, Beth Gardner, Patrick N. HalpinAbstract:Increasingly, fisheries are being managed under catch quotas that are often further allocated to specific permit holders or sectors. At the same time, serious consideration is being given to the effects of discards on the health of target and non-target species. Some quota systems have incorporated discard reduction as an objective by counting discards (including unmarketable fish) against the overall quota. The potential effect of the introduction of a quota system that includes accountability for discards on the fishing strategies employed by fishermen is enormous. This is particularly true for Multispecies fisheries where healthy and depleted stocks co-exist; resulting in a trip’s catch being applied to very large and very small stock quotas simultaneously. Under such a scenario, fishermen have a strong incentive to minimize (i) catch of low-quota or ‘choke’ stocks, (ii) regulatory discards due to minimum size limits and (iii) catch partially consumed by predators. ‘Move-on’ rules (i.e. event-triggered, targeted, temporary closure of part of a Fishery when a catch or bycatch threshold is reached) have been employed in a variety of fisheries. However, their efficacy has been limited by a lack of empirical analyses underpinning the rules. Here, we examine the utility of spatiotemporal autocorrelation analyses to inform ‘move-on’ rules to assist a sector of the New England Multispecies Fishery to reduce discards and maximize profits. We find the use of empirical move-on rules could reduce catch of juvenile and choke stocks between 27 and 33%, and depredation events between 41 and 54%.
Beatriz Morales-nin - One of the best experts on this subject based on the ideXlab platform.
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Combining sale records of landings and fishers knowledge for predicting métiers in a small-scale, multi-gear, Multispecies Fishery
Fisheries Research, 2017Co-Authors: Miquel Palmer, Borja Tolosa, Antoni Grau, María Del Mar Gil, Clara Obregón, Beatriz Morales-ninAbstract:Abstract Stock management should be guided by assessment models that, among others, need to be fed by reliable data of catch and effort. However, precise data are difficult to obtain in heterogeneous fisheries. Specifically, small-scale, multi-gear, Multispecies fisheries are dynamic systems where fishers may lively change fishing strategy (i.e., metier) conditioned by multiple drivers. Provided that some stocks can be shared by several metiers, a precise categorization of metiers should be the first step toward metier-specific estimates of catch and effort, which in turn would allow a better understanding of the system dynamics. Here we propose an approach for predicting the metier of any given fishing trip from its landing records. This approach combines the knowledge of expert fishers with the existing sales register of landings in Mallorca (Western Mediterranean). It successfully predicts metiers for all the 162,815 small-scale Fishery fishing trips from Mallorca between 2004 and 2015. The largest effort is invested in the metiers Cuttlefish/Fish and Spiny lobster, landings peak for Cuttlefish/Fish and Dolphinfish and revenues for Spiny lobster and Dolphinfish. Metier predictions also allowed us to describe the temporal (seasonal and between-year) trends experienced by each metier and to characterize the species (commercial categories) that are specific to each metier. Seasonal variability is by far more relevant than between-year variability, which confirms that at least some fishers are adopting a rotation cycle of metiers along the year. Effort (fishing trips), landings and gross revenues decreased in the last 12 years (2004–2015). The approach proposed is also applicable to any other Fishery for which the metier for a fishing trip sample is known (e.g., on-board observers or logbooks), but relying on fishers expertise points more directly to fishers’ intention. Thus, metier predictions produced with the proposed approach are closer to the actual uses of fishers, providing better grounds for an improved management.
Kotaro Ono - One of the best experts on this subject based on the ideXlab platform.
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management strategy analysis for Multispecies fisheries including technical interactions and human behavior in modeling management decisions and fishing
Canadian Journal of Fisheries and Aquatic Sciences, 2018Co-Authors: Kotaro Ono, Alan C Haynie, Anne B Hollowed, James N Ianelli, Carey R Mcgilliard, Andre E PuntAbstract:A Multispecies Fishery management strategy evaluation (MSE) framework based on the example of the groundfish Fishery in the Bering Sea and Aleutian Islands region of Alaska was used to examine the interplay between a bycatch species and three groundfish species. The study introduces a framework for a realistic Multispecies Fishery MSE by accounting for fleet dynamics, Multispecies Fishery quota allocation, and the temporal dynamics of technical interactions. The quota allocation and the fleet dynamics models were implemented using linear programming, and regression approaches were used to realistically project future users’ behavioral response to changes in the Fishery. Models were calibrated and then validated using historical and out-of-sample data, respectively. The results highlight the importance of accounting for technical interactions and their inter-annual dynamics for both quota allocation and fleet dynamics to design a realistic Multispecies Fishery MSE (without them, the amount of lost yield in...
Dale Squires - One of the best experts on this subject based on the ideXlab platform.
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Transferable quotas, enforcement costs and typical firms: An empirical application to the Norwegian trawler fleet
Environmental and Resource Economics, 1995Co-Authors: Kjell G. Salvanes, Dale SquiresAbstract:An alternative to traditional regulations of fisheries to avoid rent dissipation is the use of individual transferable quotas ( ITQ _ s ) where prices in the quota market provide the necessary information to owners of harvest rights to contract with each other. However, even under such a decentralized regime, information on the underlying technology of the fishing vessels is also necessary. First, since most fisheries consist of many interrelated production processes, in order to avoid rent dissipation by discarding wrong output mix etc., the structure of production in the Multispecies Fishery must be known to design a proper quota system. Second, an ITQ system may create incentives for misreporting by understating the actual catch. This may especially be the case where the expected degree of self-enforcement is low. The paper proposes a way to reduce the information requirements under regulation with asymmetric information by constructing a typical firm and comparing performance for the other vessels to this firm. Based on the typical firm, and if the industry is relatively homogenous, the performance and hence catch of any other firm in the industry can be predicted within a certain range. Further, the paper applies this idea to the Norwegian trawler fleet to assess the production structure in terms of jointness, input-output separability, and the supply and demand elasticities for the fishing firms. This information characterizes the Fishery and thus how the quota system may be designed and how to construct a yardstick in order to reduce the enforcement cost under a decentralized regulation of ITQs.
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Individual Transferable Quota Markets and Investment Decisions in the Fixed Gear Sablefish Industry
Journal of Environmental Economics and Management, 1994Co-Authors: Dale Squires, Mohammad Alauddin, James E. KirkleyAbstract:This paper presents an ex ante analysis of an individual transferable quota (ITQ) program imposed on one species in a Multispecies Fishery. Utilizing mathematical programming, pseudo data, and Tobit regression, market demand for quota and prospective gains in economic rent and efficiency gains from quota trade are assessed for the pot and longline sablefish fleet off the Pacific coast of the United States. Incentives for disinvestment and industry exit after quota exchange, implications for structure of the industry and ITQ market, and policy implications are examined.
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Production quota in multiproduct pacific fisheries
Journal of Environmental Economics and Management, 1991Co-Authors: Dale Squires, James E. KirkleyAbstract:Abstract Assessing the individual firm's technology and costs in a Multispecies Fishery allows design of a more effective output quota prior to regulation by anticipating and controlling for the firm's regulation-induced responses. An empirical study of a Pacific coast trawl Fishery indicates that the firm's flexibility of product decision is tightly constrained by its technology and cost structure. Hence, as the resource stock for the regulated species, sablefish, deteriorates and the trip quota progressively tightens, the firm cannot sufficiently reorganize its product bundle to preclude increasingly large sablefish disposal. This defeats the purpose of the production quota.
