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Artykuły w czasopismach na temat "Multispecies yield-effort models"

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Lorenzen, Kai, Oriana Almeida, Robert Arthur, Caroline Garaway, and Sophie Nguyen Khoa. "Aggregated yield and fishing effort in multispecies fisheries: an empirical analysis." Canadian Journal of Fisheries and Aquatic Sciences 63, no. 6 (2006): 1334–43. http://dx.doi.org/10.1139/f06-038.

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Many tropical fisheries are inherently of a multispecies nature, with any given type of fishing gear harvesting a wide range of species. Species-aggregated relationships between fishing effort and yield or catch per unit of effort (CPUE) provide important information for the management of such fisheries, as well as insights into ecosystem-level responses to fisheries exploitation. We used a model selection approach to study species-aggregated, yield–effort relationships in spatially replicated, multispecies inland fisheries. Of three alternative models considered, the data strongly supported a
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Thorpe, Robert Brian, Paul James Dolder, Stuart Reeves, Peter Robinson, and Simon Jennings. "Assessing fishery and ecological consequences of alternate management options for multispecies fisheries." ICES Journal of Marine Science 73, no. 6 (2016): 1503–12. http://dx.doi.org/10.1093/icesjms/fsw028.

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AbstractDemands for management advice on mixed and multispecies fisheries pose many challenges, further complicated by corresponding requests for advice on the environmental impacts of alternate management options. Here, we develop, and apply to North Sea fisheries, a method for collectively assessing the effects of, and interplay between, technical interactions, multispecies interactions, and the environmental effects of fishing. Ecological interactions involving 21 species are characterized with an ensemble of 188 plausible parameterizations of size-based multispecies models, and four fleets
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Ashley, Stewart Halls, and Golam Mustafa Md. "Empirical Yield-effort Models for Bangladesh Inland Fisheries." Journal of Applied Life Sciences International 12, no. 2 (2017): 1–10. https://doi.org/10.9734/JALSI/2017/33858.

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<strong>Aims: </strong>To support community-based fisheries management (CBFM) of inland fisheries resources in Bangladesh. <strong>Study Design: </strong>An investigation into the impact of the nationwide CBFM Project and four alternative yield-effort models were fitted to the catch (yield) and effort data. <strong>Place and Duration of Study: </strong>The study comprised community managed fisheries (sites) located in five different inland water habitat types in Bangladesh for the period 1997-2005. <strong>Methodology: </strong>Using data compiled for this impact assessment, the aggregated yie
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Collie, Jeremy S., Henrik Gislason, and Morten Vinther. "Using AMOEBAs to display multispecies, multifleet fisheries advice." ICES Journal of Marine Science 60, no. 4 (2003): 709–20. http://dx.doi.org/10.1016/s1054-3139(03)00042-0.

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Abstract In multispecies fish communities, predation levels change dynamically in response to changes in the abundance of predator and prey species, as influenced by the fisheries that exploit them. In addition to community-level metrics, it remains necessary to track the abundance of each species relative to its biological reference point. In situations with many interacting species, exploited by multiple fishing fleets, it can be complicated to illustrate how the effort of each fleet will affect the abundance of each species. We have adapted the AMOEBA approach to graph the reference levels
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Gaichas, Sarah K., Michael Fogarty, Gavin Fay, Robert Gamble, Sean Lucey, and Laurel Smith. "Combining stock, multispecies, and ecosystem level fishery objectives within an operational management procedure: simulations to start the conversation." ICES Journal of Marine Science 74, no. 2 (2016): 552–65. http://dx.doi.org/10.1093/icesjms/fsw119.

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We explored alternative status determination criteria and reference points that could simplify fisheries management using a simulated multispecies/ecosystem-based operational management procedure. There are four components to the procedure: (i) limit total removals from the ecosystem; (ii) allocate the total removals limit among aggregate species groups; (iii) maintain individual species above minimum stock size thresholds; and (iv) optimize the species mix (within aggregates) based on bio-economic portfolio analysis. In this procedure, “overfishing” criteria are applied only to aggregates of
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Holland, Daniel S., and Jean-Jacques Maguire. "Optimal effort controls for the multispecies groundfish complex in New England: what might have been." Canadian Journal of Fisheries and Aquatic Sciences 60, no. 2 (2003): 159–70. http://dx.doi.org/10.1139/f03-010.

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Age-structured models are used to calculate catches and revenues of the principal stocks in the northeast multispecies groundfish fishery over the 1982–1997 period assuming alternative control rules on fishing effort had been employed. Various static levels of nominal effort are compared with controls that maintain fishing mortality below overfishing thresholds for all stocks. An unambiguous result from this analysis is that substantial reductions in fishing effort would have increased the value of the fishery even if resulting increases in spawning stock biomass (SSB) had not increased recrui
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Smith, Michael D., Elizabeth A. Fulton, and Robert W. Day. "An investigation into fisheries interaction effects using Atlantis." ICES Journal of Marine Science 72, no. 1 (2014): 275–83. http://dx.doi.org/10.1093/icesjms/fsu114.

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Abstract Fisheries management is commonly based on the outputs of single-species stock assessment models. While such models are appropriate for tactical issues such as quota setting, they typically omit explicit trophic interactions between different parts of the ecosystem. To successfully manage multiple fisheries in the same ecosystem, we need to understand how fishing one species may indirectly affect other species. In this paper, we used a simulation model of the southern Benguela ecosystem, built in the Atlantis framework, to explore fisheries interaction effects. We first measured the im
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Agnew, D. J., C. P. Nolan, J. R. Beddington, and R. Baranowski. "Approaches to the assessment and management of multispecies skate and ray fisheries using the Falkland Islands fishery as an example." Canadian Journal of Fisheries and Aquatic Sciences 57, no. 2 (2000): 429–40. http://dx.doi.org/10.1139/f99-264.

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Eleven rajid species are taken around the Falkland Islands, with four species, Bathyraja griseocauda, Bathyraja albomaculata, Bathyraja brachyurops, and Raja flavirostris dominating commercial catches and generally occurring together. Catch limits for individual species are not used in management because species are not separated in the catch or reported separately. The catch per unit effort for the mixed rajid assemblage was standardised using generalised linear modelling techniques, and two production models were used to estimate stock size and sustainable yield. Maximum likelihood methods w
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Caddy, J. F. "Modelling Stock–Recruitment Processes in Crustacea: Some Practical and Theoretical Perspectives." Canadian Journal of Fisheries and Aquatic Sciences 43, no. 11 (1986): 2330–44. http://dx.doi.org/10.1139/f86-285.

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Several approaches toward development of stock and recruitment models for exploited crustacean populations are reviewed. Such approaches include modifications of classical stock–recruitment models, or ones more directly related to crustacean biology. The latter are believed to offer the most promise for practical application. Standard yield per recruit models using continuous growth functions have been applied to crustacean stocks, but moult increment – frequency versions of yield per recruit calculations better reflect the discrete growth in crustaceans and changes in growth on maturity. They
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Zhao, Shiqing, Richard Kindong, Chunxia Gao, Zhiwei Liu, and Siquan Tian. "Catch‐Based Stock Assessment of Silver Croaker (Pennahia argentata) Based on Different Fishing Indicators in the East China Sea." Aquaculture Research 2025, no. 1 (2025). https://doi.org/10.1155/are/1916662.

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Data limitations in multispecies fisheries make traditional stock assessments challenging for many developing coastal countries. Despite China’s large marine ecosystems, most fish stocks remain unassessed. This study evaluates the stock status of silver croaker (Pennahia argentata) in the East China Sea (ECS) from 2003 to 2022 using catch‐based methods and data from the China Fisheries Statistical Yearbook (CFSY). Three models indicate that the 2022 catch is below the estimated maximum sustainable yield (MSY), suggesting a healthy stock status. The study also tests four catch per unit effort (
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