Some comments on the suggested use of the “one third for the birds” measure as a pelagic OMP performance statistic threshold
| dc.contributor.author | Butterworth, Doug S | |
| dc.date.accessioned | 2016-05-17T07:42:39Z | |
| dc.date.available | 2016-05-17T07:42:39Z | |
| dc.date.issued | 2015 | |
| dc.date.updated | 2016-05-04T06:36:52Z | |
| dc.description.abstract | Although Cury et al. (2011) provide valuable insight into seabird population dynamics, their suggested application of a “one third for the birds” threshold is considered premature for a number of reasons. Further research remains needed to develop population models for the seabird populations considered, to utilise the assessments of their prey species to infer their abundance distributions in the absence of harvesting, and to take account of size structure effects. Such thresholds are not pertinent when Management Procedures (MPs) are used to provide management advice; there the relevant performance statistics relate to projected seabird abundance trends. The role of analyses such as those by Cury et al. (2011) in such circumstances is to inform the specification of the predator-prey models included in the operating models used for testing those MPs. | en_ZA |
| dc.identifier.apacitation | Butterworth, D. S. (2015). <i>Some comments on the suggested use of the “one third for the birds” measure as a pelagic OMP performance statistic threshold</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/19689 | en_ZA |
| dc.identifier.chicagocitation | Butterworth, Doug S <i>Some comments on the suggested use of the “one third for the birds” measure as a pelagic OMP performance statistic threshold.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2015. http://hdl.handle.net/11427/19689 | en_ZA |
| dc.identifier.citation | Butterworth, D. S. (2015). Some comments on the suggested use of the “one third for the birds” measure as a pelagic OMP performance statistic threshold, DAFF Branch FISHERIES/2015/JULY/SWG-PEL/24. | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - Butterworth, Doug S AB - Although Cury et al. (2011) provide valuable insight into seabird population dynamics, their suggested application of a “one third for the birds” threshold is considered premature for a number of reasons. Further research remains needed to develop population models for the seabird populations considered, to utilise the assessments of their prey species to infer their abundance distributions in the absence of harvesting, and to take account of size structure effects. Such thresholds are not pertinent when Management Procedures (MPs) are used to provide management advice; there the relevant performance statistics relate to projected seabird abundance trends. The role of analyses such as those by Cury et al. (2011) in such circumstances is to inform the specification of the predator-prey models included in the operating models used for testing those MPs. DA - 2015 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - Some comments on the suggested use of the “one third for the birds” measure as a pelagic OMP performance statistic threshold TI - Some comments on the suggested use of the “one third for the birds” measure as a pelagic OMP performance statistic threshold UR - http://hdl.handle.net/11427/19689 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/19689 | |
| dc.identifier.vancouvercitation | Butterworth DS. Some comments on the suggested use of the “one third for the birds” measure as a pelagic OMP performance statistic threshold. 2015 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/19689 | 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.subject.other | seabird population dynamics | |
| dc.subject.other | seabird abundance trends | |
| dc.subject.other | predator-prey models | |
| dc.title | Some comments on the suggested use of the “one third for the birds” measure as a pelagic OMP performance statistic threshold | 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 |