Obtaining a standardised CPUE series for toothfish (Dissostichus eleginoides) in the Prince Edward Islands EEZ calibrated to incorporate both longline and trotline data over the period 1997-2012
| dc.contributor.author | Brandão, Anabela | |
| dc.contributor.author | Butterworth, Doug S | |
| dc.date.accessioned | 2016-03-15T09:48:14Z | |
| dc.date.available | 2016-03-15T09:48:14Z | |
| dc.date.issued | 2012 | |
| dc.date.updated | 2016-03-15T09:46:37Z | |
| dc.description.abstract | The previous GLMM standardisation approach for PEI toothfish (Spanish) longline CPUE data is extended to include data for the 2011-2012 seasons and the same approach is applied to trotline CPUE data for the 2008–2012 period. CPUE data from a research program carried out in 2012 in which longline and trotline sets were paired to within three nautical miles and a period of two weeks is analysed to obtain a calibration factor for longlines and trotlines. A model is then fitted to combine the two individual standardised CPUE series and the calibration factor to obtain a “calibrated” longline CPUE series (incorporating both longline and trotline information) and an estimate of the calibration factor. This indicates a drop of about 44% in standardised CPUE in 2012 compared to the immediately preceding years; however it must be noted that the data in 2012 is available only until August. | en_ZA |
| dc.identifier.apacitation | Brandão, A., & Butterworth, D. S. (2012). <i>Obtaining a standardised CPUE series for toothfish (Dissostichus eleginoides) in the Prince Edward Islands EEZ calibrated to incorporate both longline and trotline data over the period 1997-2012</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/17801 | en_ZA |
| dc.identifier.chicagocitation | Brandão, Anabela, and Doug S Butterworth <i>Obtaining a standardised CPUE series for toothfish (Dissostichus eleginoides) in the Prince Edward Islands EEZ calibrated to incorporate both longline and trotline data over the period 1997-2012.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2012. http://hdl.handle.net/11427/17801 | en_ZA |
| dc.identifier.citation | Brandão, A., & Butterworth, D. S. (2012). Obtaining a standardised CPUE series for toothfish (Dissostichus eleginoides) in the Prince Edward Islands EEZ calibrated to incorporate both longline and trotline data over the period 1997-2013. DAFF Branch Fisheries document. FISHERIES. | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - Brandão, Anabela AU - Butterworth, Doug S AB - The previous GLMM standardisation approach for PEI toothfish (Spanish) longline CPUE data is extended to include data for the 2011-2012 seasons and the same approach is applied to trotline CPUE data for the 2008–2012 period. CPUE data from a research program carried out in 2012 in which longline and trotline sets were paired to within three nautical miles and a period of two weeks is analysed to obtain a calibration factor for longlines and trotlines. A model is then fitted to combine the two individual standardised CPUE series and the calibration factor to obtain a “calibrated” longline CPUE series (incorporating both longline and trotline information) and an estimate of the calibration factor. This indicates a drop of about 44% in standardised CPUE in 2012 compared to the immediately preceding years; however it must be noted that the data in 2012 is available only until August. DA - 2012 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2012 T1 - Obtaining a standardised CPUE series for toothfish (Dissostichus eleginoides) in the Prince Edward Islands EEZ calibrated to incorporate both longline and trotline data over the period 1997-2012 TI - Obtaining a standardised CPUE series for toothfish (Dissostichus eleginoides) in the Prince Edward Islands EEZ calibrated to incorporate both longline and trotline data over the period 1997-2012 UR - http://hdl.handle.net/11427/17801 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/17801 | |
| dc.identifier.vancouvercitation | Brandão A, Butterworth DS. Obtaining a standardised CPUE series for toothfish (Dissostichus eleginoides) in the Prince Edward Islands EEZ calibrated to incorporate both longline and trotline data over the period 1997-2012. 2012 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17801 | 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 | Obtaining a standardised CPUE series for toothfish (Dissostichus eleginoides) in the Prince Edward Islands EEZ calibrated to incorporate both longline and trotline data over the period 1997-2012 | en_ZA |
| dc.type | Working Paper | en_ZA |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Research paper | en_ZA |