Capture-recapture analyses of humpback whale population sizes and increase rates: breeding sub-stock B1
| dc.contributor.author | Johnston, Susan J | |
| dc.contributor.author | Butterworth, Doug S | |
| dc.date.accessioned | 2016-04-01T10:01:37Z | |
| dc.date.available | 2016-04-01T10:01:37Z | |
| dc.date.issued | 2008 | |
| dc.date.updated | 2016-04-01T09:59:48Z | |
| dc.description.abstract | Maximum likelihood and Bayesian approaches are applied to estimate parameters of a simple experimental growth model for the humpback whales of breeding sub-stock B1 from photo-ID and genotypic capture-recapture data for all observation sites combined and for Iguela only. The maximum likelihood estimates are generally rather imprecise, and some estimates for the annual growth rate r are demographically unrealistic. Bayesian results, for which a prior restricts its r to a demographically plausible range of [0; 0.106], are more reliable and suggest a population of size 7600 [95% PI: 6600-8800] in 2003, with r at 8.5% [95% PI: 3.7%-10.4%]. These results, are however, intended primarily as illustrative of the methodologies, and to facilitate further discussion and model refinement. This will need, inter alia, to consider the appropriateness of aggregating data from different sites. | en_ZA |
| dc.identifier.apacitation | Johnston, S. J., & Butterworth, D. S. (2008). <i>Capture-recapture analyses of humpback whale population sizes and increase rates: breeding sub-stock B1</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/18505 | en_ZA |
| dc.identifier.chicagocitation | Johnston, Susan J, and Doug S Butterworth <i>Capture-recapture analyses of humpback whale population sizes and increase rates: breeding sub-stock B1.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2008. http://hdl.handle.net/11427/18505 | en_ZA |
| dc.identifier.citation | Johnston, S. J., & Butterworth, D. S. (2008). Capture-recapture analyses of humpback whale population sizes and increase rates: breeding sub-stock B1. International Whaling Commission Scientific Committee, Santiago, Chile, 9. | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - Johnston, Susan J AU - Butterworth, Doug S AB - Maximum likelihood and Bayesian approaches are applied to estimate parameters of a simple experimental growth model for the humpback whales of breeding sub-stock B1 from photo-ID and genotypic capture-recapture data for all observation sites combined and for Iguela only. The maximum likelihood estimates are generally rather imprecise, and some estimates for the annual growth rate r are demographically unrealistic. Bayesian results, for which a prior restricts its r to a demographically plausible range of [0; 0.106], are more reliable and suggest a population of size 7600 [95% PI: 6600-8800] in 2003, with r at 8.5% [95% PI: 3.7%-10.4%]. These results, are however, intended primarily as illustrative of the methodologies, and to facilitate further discussion and model refinement. This will need, inter alia, to consider the appropriateness of aggregating data from different sites. DA - 2008 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2008 T1 - Capture-recapture analyses of humpback whale population sizes and increase rates: breeding sub-stock B1 TI - Capture-recapture analyses of humpback whale population sizes and increase rates: breeding sub-stock B1 UR - http://hdl.handle.net/11427/18505 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/18505 | |
| dc.identifier.vancouvercitation | Johnston SJ, Butterworth DS. Capture-recapture analyses of humpback whale population sizes and increase rates: breeding sub-stock B1. 2008 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18505 | 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 | Capture-recapture | |
| dc.subject.other | humpback whale | |
| dc.title | Capture-recapture analyses of humpback whale population sizes and increase rates: breeding sub-stock B1 | en_ZA |
| dc.type | Working Paper | en_ZA |
| uct.type.filetype | Text | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Research paper | en_ZA |