Method for Estimating Detection Probabilities of Nonmigrant Tagged Fish: Applications for Quantifying Residualization Rates

Autor: Michael C. Melnychuk, Stephen Hausch
Rok vydání: 2011
Předmět:
Zdroj: Transactions of the American Fisheries Society. 140:1613-1628
ISSN: 1548-8659
0002-8487
Popis: Detection probabilities are commonly accounted for in spatial mark–recapture studies to estimate quantities of biological interest such as survival, movement, or abundance, but they generally require large numbers of tagged animals to be detected. In some studies, few tagged animals are present at a particular time; the ability to estimate detection probability despite small sample sizes during some time periods would greatly improve inferences of ecologically relevant attributes. We developed a method for estimating time-varying detection probabilities of tagged fish at acoustic or radio receiver stations during periods in which few tagged fish are present and mark–recapture methods are thus prohibitive. We quantified how an index of detection probability varies with an environmental covariate, and then calibrated this index against mark–recapture detection probability estimates derived from detection data collected when tagged fish were abundant. With a known time series of the environmental co...
Databáze: OpenAIRE
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