作者: JAMES S. SEDINGER , CHRISTOPHER A. NICOLAI , CALVIN J. LENSINK , CYNTHIA WENTWORTH , BRUCE CONANT
DOI: 10.2193/2005-768
关键词: Population 、 Covariate 、 Black brant 、 Population size 、 Branta 、 Predation 、 Demography 、 Density dependence 、 Ecology 、 Biology
摘要: Abstract We analyzed 53 years of banding and band recovery data along with estimates harvest population size to assess the role density dependence in survival patterns dynamics black brant (Branta bernicla nigricans) over period 1950–2003. The has declined steadily since complete annual surveys began 1960, so this is considerable interest. used Brownie models implemented Program MARK analyze data. In some models, we incorporated estimated sport test hypotheses about survival. also examined hypothesis density-dependent regulation mortality by incorporating as a covariate into For shorter (1985–2003), assessed subsistence predation sources mortality. best supported model variation reco...