Assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity to include data from 1997 to 2017

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dc.contributor.authorBrandão, Anabela
dc.contributor.authorButterworth, Doug S
dc.date.accessioned2019-06-21T07:12:38Z
dc.date.available2019-06-21T07:12:38Z
dc.date.issued2018-10
dc.description.abstractThe assessment of the Prince Edward Islands (PEI) toothfish (Dissostichus eleginoides) resource carried out by Brandão and Butterworth (2017) is updated to take further data now available for 2017 into account. This update also incorporates tag-recapture data and a new basis to estimate the extent of cetacean depredation. For the Base case and many of the assessment sensitivities, the resource is estimated to be at a depletion (in relation to its average pre-exploitation level in terms of spawning biomass) in the 36-42% range. If the model is forced to fit the trotline CPUE indices and the tag-recapture data as well, the estimated average pre-exploitation level in terms of spawning biomass is in the range of 12-26%, but this requires an assumption of very high levels of tag loss.en_US
dc.identifier.apacitationBrandão, A., & Butterworth, D. (2018). <i>Assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity to include data from 1997 to 2017</i> ,Faculty of Science ,Department of Mathematics and Applied Mathematics. Retrieved from http://hdl.handle.net/11427/30241en_ZA
dc.identifier.chicagocitationBrandão, Anabela, and Doug Butterworth <i>Assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity to include data from 1997 to 2017.</i> ,Faculty of Science ,Department of Mathematics and Applied Mathematics, 2018. http://hdl.handle.net/11427/30241en_ZA
dc.identifier.citationBrandão, A., Butterworth, D. 2018-10. Assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity to include data from 1997 to 2017.en_ZA
dc.identifier.ris TY - Report AU - Brandão, Anabela AU - Butterworth, Doug AB - The assessment of the Prince Edward Islands (PEI) toothfish (Dissostichus eleginoides) resource carried out by Brandão and Butterworth (2017) is updated to take further data now available for 2017 into account. This update also incorporates tag-recapture data and a new basis to estimate the extent of cetacean depredation. For the Base case and many of the assessment sensitivities, the resource is estimated to be at a depletion (in relation to its average pre-exploitation level in terms of spawning biomass) in the 36-42% range. If the model is forced to fit the trotline CPUE indices and the tag-recapture data as well, the estimated average pre-exploitation level in terms of spawning biomass is in the range of 12-26%, but this requires an assumption of very high levels of tag loss. DA - 2018-10 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PY - 2018 T1 - Assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity to include data from 1997 to 2017 TI - Assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity to include data from 1997 to 2017 UR - http://hdl.handle.net/11427/30241 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/30241
dc.identifier.vancouvercitationBrandão A, Butterworth D. Assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity to include data from 1997 to 2017. 2018 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/30241en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Mathematics and Applied Mathematicsen_US
dc.publisher.facultyFaculty of Scienceen_US
dc.titleAssessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity to include data from 1997 to 2017en_US
dc.typeReporten_US
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