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- Title
Inferring causal factors for a declining population of bottlenose dolphins via temporal symmetry capture–recapture modeling
- Authors
Currey, Rohan J. C.; Dawson, Stephen M.; Schneider, Karsten; Lusseau, David; Boisseau, Oliver J.; Haase, Patti A.; Slooten, Elisabeth
- Abstract
AbstractWe applied temporal symmetry capture–recapture (TSCR) models to assess the strength of evidence for factors potentially responsible for population decline in bottlenose dolphins (Tursiops truncatus) in Doubtful Sound, New Zealand from 1995 to 2008. Model selection was conducted to estimate recruitment and population growth rates. There were similar levels of support for three different models, each reflecting distinct trends in recruitment. Modeling yielded low overall estimates of recruitment (0.0249, 95% CI: 0.0174–0.0324) and population growth rate (0.9642, 95% CI: 0.9546–0.9737). The TSCR rate of population decline was consistent with an estimate derived from trends in abundance (lambda = 0.9632, 95% CI: 0.9599–0.9665). The TSCR model selection confirmed the influence of a decline in the survival of calves (
- Publication
Marine Mammal Science, 2011, Vol 27, Issue 3, p554
- ISSN
0824-0469
- DOI
10.1111/j.1748-7692.2010.00417.x