Managing a complex population structure: exploring the importance of information from fisheries-independent sources
| العنوان: | Managing a complex population structure: exploring the importance of information from fisheries-independent sources |
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| المؤلفون: | Richard D.M. Nash, Niels T. Hintzen, B.A. Roel, Maurice Clarke, Afra Egan, Norbert Rohlf, Emma M. C. Hatfield, Daniel P.L.D. Benden |
| المصدر: | ICES Journal of Marine Science, 72(2), 528-542 ICES Journal of Marine Science 72 (2015) 2 |
| بيانات النشر: | Oxford University Press, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | 0106 biological sciences, Stock assessment, british-isles, state-space model, Population, British Isles, FLR, Aquatic Science, Biology, Oceanography, Fish stock, Visserij, 010603 evolutionary biology, 01 natural sciences, Mixing, Stock structure, management strategies, celtic sea, 14. Life underwater, north-sea, scientific survey, education, Clupea harengus, stock assessment, Ecology, Evolution, Behavior and Systematics, Stock (geology), education.field_of_study, Atlantic herring, Ecology, 010604 marine biology & hydrobiology, management strategy evaluation, dynamics, biology.organism_classification, Classification, Natural resource, Fishery, Overexploitation, herring clupea-harengus, Survey data collection, management advice, Atlantic Herring, atlantic, spawning components |
| الوصف: | Peer-reviewed. This is a pre-copy-editing, author-produced PDF of an article accepted for publication in ICES Journal of Marine Science following peer review. The definitive publisher-authenticated version is available online at: doi: 10.1093/icesjms/fsu102 Natural resource managers aim to manage fish stocks at sustainable levels. Often, management of these stocks is based on the results of analytical stock assessments. Accurate catch data, which can be attributed to a specific population unit and reflects the population structure, are needed for these approaches. Often though, the quality of the catch data is compromised when dealing with a complex population structure where fish of different population units mix in a fishery. The herring population units west of the British Isles are prone to mixing. Here, the inability to perfectly allocate the fish caught to the population unit they originate from, due to classification problems, poses problems for management. These mixing proportions are often unknown; therefore, we use simulation modelling combined with management strategy evaluation to evaluate the role fisheries-independent surveys can play in an assessment to provide unbiased results, irrespective of population unit mixing and classification success. We show that failure to account for mixing is one of the major drivers of biased estimates of population abundance, affecting biomass reference points and MSY targets. When mixing of population units occurs, the role a survey can play to provide unbiased assessment results is limited. Either different assessment models should be employed or stock status should be considered from the survey data alone. In addition, correctly classifying the origin of fish is especially important for those population units that are markedly smaller in size than other units in the population complex. Without high classification success rates, smaller population units are extremely vulnerable to overexploitation. Funder: Marine Institute |
| وصف الملف: | application/octet-stream; application/pdf |
| اللغة: | English |
| تدمد: | 1054-3139 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ececa79d15cc61fdf64312b510916044 http://hdl.handle.net/10793/1076 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....ececa79d15cc61fdf64312b510916044 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10543139 |
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