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Our core businesses produce scientific, technical, medical, and scholarly journals, reference works, books, database services, and advertising professional books, subscription products, certification and training services and online applications and education content and services including integrated online teaching and learning resources for undergraduate and graduate students and lifelong learners. Wiley is a global provider of content and content-enabled workflow solutions in areas of scientific, technical, medical, and scholarly research professional development and education. More broadly, we have illustrated how the powerful and relatively straightforward tools of information-theoretic-based model fitting can be used to sort through and parameterize quite complex demographic modeling frameworks. Our results can be used to focus future research on southern sea otters by highlighting the life history stages and mortality factors most relevant to conservation. The greatest temporal decrease in survival was for adult females, and variation in the survival of this age/sex class is primarily responsible for regulating population growth and driving population trends. These results show that survival has decreased substantially from the early 1990s to the present and is generally lowest in the north-central portion of the population's range. We compared these results to current demographic parameters estimated in a telemetry-based study conducted between 20. We evaluated a wide range of possible spatial and temporal effects and used model averaging to incorporate model uncertainty into the resulting estimates of key vital rates and their variances. We developed a maximum likelihood-based analysis to estimate spatial and temporal trends in age/sex-specific survival rates for the threatened southern sea otter (Enhydra lutris nereis), using annual population censuses and the age structure of salvaged carcass collections.
Reliable information on historical and current population dynamics is central to understanding patterns of growth and decline in animal populations.
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