Article,
Predicting life-history traits for female New Zealand sea lions, Phocarctos hookeri: integrating short-term mark-recapture data and population modeling
Journal of Agricultural, Biological, and Environmental Statistics, 15 (2): 259--278 (2010)
DOI: 10.1007/s13253-009-0011-0
Abstract
The trade-off between survival and reproduction by individuals is central to understanding life-history parameters of a species. Few mammal species have life-history information from long-term research. Instead, demographic models are commonly utilized to investigate an individual’s life-history strategy, species dynamics, and population trends. This research investigates age-related survival and reproductive performance of adult female New Zealand (NZ) sea lions ( Phocarctos hookeri ), using multi-state mark-recapture data from known-age branded individuals over five years. The mark-recapture analysis was integrated with a population model to predict the lifetime reproductive output of female NZ sea lions. The integration of an analysis of short-term datasets with population modeling allows for the prediction of life-history parameters of long lived animals when long-term information is not available. While such approaches involve some caveats, it provides a framework for investigating population dynamics and is preferential to unsubstantiated assumptions. This technique can lead to better design and implementation of conservation management for long lived species. Base code is provided in the online supplement.
