Correcting bias in survival estimation resulting from tag failure in acoustic and radiotelemetry studies
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The high detection rates of acoustic- and radio-tagged fish greatly improve the ability of an investigator to obtain information on survival and movement of fish with fewer tags. The trade-off, though, is a greater dependence on the individual tag performance, as each tagged fish in a smaller study represents a greater proportion of the outcome. This reduction in release size, due to the increase in detection capability, places a greater emphasis on the need to accurately gauge the status of the tagged fish. Should a tag fail while a smolt is migrating through the study area, the release-recapture model cannot discern the difference between smolt death and tag failure. If the release-recapture models are not adjusted for the probability of tag failure, the estimates of smolt survival will therefore be negatively biased. This article presents a semiparametric approach for adjusting survival estimates from release-recapture studies for tag failure, and provides subsequent estimation of sampling variance and its contributing components.
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- Correcting bias in survival estimation resulting from tag failure in acoustic and radiotelemetry studies
Journal of Agricultural, Biological, and Environmental Statistics
Volume 11, Issue 2 , pp 183-196
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- Gompertz distribution
- Maximum likelihood
- Author Affiliations
- 1. School of Aquatic and Fishery Sciences, University of Washington, 1325 Fourth Avenue, Suite 1820, 98101-2509, Seattle, WA
- 2. Department of Mathematics and Statistics, University of Otago, P.O. Box 56, Dunedi, New Zealand
- 3. Hydroacoustic Technology, Inc., 715 NE Northlake Way, 98101-6429, Seattle, WA