Number of censuses required for demographic estimation of effective population size
Article Abstract:
The number of censuses needed for estimating effective animal population sizes has been studied. Adequate population viability assessment for a population may require estimation of effective population size (N). Failure to allow for effects of temporal fluctuation in population size (FPS) on N may lead to overly optimistic viability assessments. A technique that allows for the effect of FPS on N has been evaluated. N has been shown to be dependent on timescale through use of time series of annual counts of 48 animal populations that are free ranging. With more census records included, estimates of FPS tend to grow larger and estimates of N tend to be smaller. Estimates of N based on a few annual counts are unreliable. Long-term population monitoring is needed.
Publication Name: Conservation Biology
Subject: Zoology and wildlife conservation
ISSN: 0888-8892
Year: 1998
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Direct perturbation analysis for better conservation
Article Abstract:
Direct analysis of perturbations using life-table response experiment (LTRE) analysis should be used whenever possible to determine key life-cycle phases for conservation. When data on actual variation from several populations or several years can be obtained, LTRE can be used to determine the contribution of each life-cycle stage to the overall population growth rate. Elasticity matrices may not provide accurate estimates of critical life-cycle phases.
Publication Name: Conservation Biology
Subject: Zoology and wildlife conservation
ISSN: 0888-8892
Year: 1998
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Three faces of ecosystem management
Article Abstract:
Issues discussed concern the various methods and objectives of environmental groups involved with ecosystem management. Topics addressed include anthropocentric, holistic, and ecocentric philosophies of conservation, as well as their various applications to ecosystem management policies.
Publication Name: Conservation Biology
Subject: Zoology and wildlife conservation
ISSN: 0888-8892
Year: 1999
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