Inclusion of skipper effect in the GLM standardisation of the CPUE abundance indices for orange roughy off Namibia
| dc.contributor.author | Brandão, Anabela | |
| dc.contributor.author | Butterworth, Doug S | |
| dc.date.accessioned | 2016-04-01T10:31:34Z | |
| dc.date.available | 2016-04-01T10:31:34Z | |
| dc.date.issued | 2007 | |
| dc.date.updated | 2016-04-01T10:30:15Z | |
| dc.description.abstract | Various GLM analyses are used to standardise the CPUE data for Namibian orange roughy to investigate the impact of using information on skippers rather than on vessels. The inclusion in the GLMs of a skipper factor rather than a vessel factor results in lower CPUE indices for the most recent years. Classifying skippers as experienced or inexperienced in orange roughy fishing does not have an appreciable impact on standardised CPUE trends. However, classifying individual initially inexperienced skippers as experienced after their first year in the fishery results in lower CPUE indices, in particular for the last four years. In broad terms, there is not a clear difference between skippers pre-classified as experienced or inexperienced. | en_ZA |
| dc.identifier.apacitation | Brandão, A., & Butterworth, D. S. (2007). <i>Inclusion of skipper effect in the GLM standardisation of the CPUE abundance indices for orange roughy off Namibia</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/18509 | en_ZA |
| dc.identifier.chicagocitation | Brandão, Anabela, and Doug S Butterworth <i>Inclusion of skipper effect in the GLM standardisation of the CPUE abundance indices for orange roughy off Namibia.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2007. http://hdl.handle.net/11427/18509 | en_ZA |
| dc.identifier.citation | Brandão, A., & Butterworth, D. S. (2007). Inclusion of skipper effect in the GLM standardisation of the CPUE abundance indices for orange roughy off Namibia. MARAM: University of Cape Town. | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - Brandão, Anabela AU - Butterworth, Doug S AB - Various GLM analyses are used to standardise the CPUE data for Namibian orange roughy to investigate the impact of using information on skippers rather than on vessels. The inclusion in the GLMs of a skipper factor rather than a vessel factor results in lower CPUE indices for the most recent years. Classifying skippers as experienced or inexperienced in orange roughy fishing does not have an appreciable impact on standardised CPUE trends. However, classifying individual initially inexperienced skippers as experienced after their first year in the fishery results in lower CPUE indices, in particular for the last four years. In broad terms, there is not a clear difference between skippers pre-classified as experienced or inexperienced. DA - 2007 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2007 T1 - Inclusion of skipper effect in the GLM standardisation of the CPUE abundance indices for orange roughy off Namibia TI - Inclusion of skipper effect in the GLM standardisation of the CPUE abundance indices for orange roughy off Namibia UR - http://hdl.handle.net/11427/18509 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/18509 | |
| dc.identifier.vancouvercitation | Brandão A, Butterworth DS. Inclusion of skipper effect in the GLM standardisation of the CPUE abundance indices for orange roughy off Namibia. 2007 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18509 | en_ZA |
| dc.language | eng | en_ZA |
| dc.publisher.department | Marine Resource Assessment and Management Group | en_ZA |
| dc.publisher.faculty | Faculty of Science | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.title | Inclusion of skipper effect in the GLM standardisation of the CPUE abundance indices for orange roughy off Namibia | en_ZA |
| dc.type | Working Paper | en_ZA |
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Research paper | en_ZA |