Simulation testing of the sabbatical model estimator for the assessment of Southern Hemisphere humpback whale breeding Stock C and its component Sub-stocks

 

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dc.contributor.author Johnston, Susan J
dc.contributor.author Butterworth, Doug S
dc.contributor.author Muller, A
dc.date.accessioned 2016-04-01T10:57:38Z
dc.date.available 2016-04-01T10:57:38Z
dc.date.issued 2009
dc.identifier.citation Johnston, S. J., Butterworth, D. S., & Muller, A. (2009). Simulation testing of the sabbatical model estimator for the assessment of Southern Hemisphere humpback whale breeding Stock C and its component Sub-stocks. International Whaling Commission document: SC/61/SH28, 1-11. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/18513
dc.description.abstract Johnston and Butterworth (2009) implement four models (Resident, Sabbatical, Tourist and Migrant) to estimate parameters for the C1 and C3 substocks, including the probability of interchange between them, using a Bayesian approach which takes account of capture-recapture information from photo-id data. This estimator generally captures the underlying parameter values reasonably, though with a tendency to estimate r too low and K too high. Interchange rates are also reasonably estimated, both when the true rates are low and high. In the latter case, abundance estimates in terms are lower. Here a range of Operating Models (OMs) are defined and used to test the Sabbatical estimator en_ZA
dc.language eng en_ZA
dc.subject.other Humpback whales
dc.subject.other Simulation testing
dc.subject.other Interchange
dc.title Simulation testing of the sabbatical model estimator for the assessment of Southern Hemisphere humpback whale breeding Stock C and its component Sub-stocks en_ZA
dc.type Working Paper en_ZA
dc.date.updated 2016-04-01T10:55:46Z
uct.type.publication Research en_ZA
uct.type.resource Research paper en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Marine Resource Assessment and Management Group en_ZA
uct.type.filetype Text


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