Capture-recapture studies using radio telemetry with premature radio-tag failure.
Radio tags, because of their high detectability, are often used in capture-recapture studies. A key assumption is that radio tags do not cease functioning during the study. Radio-tag failure before the end of a study can lead to underestimates of survival rates. We develop a model to incorporate secondary radio-tag failure data. This model was applied to chinook smolts (Oncorhynchus tshawytscha) on the Columbia River, Washington. Estimates of fish survival from this model were much larger than those from the standard Cormack-Jolly-Seber analysis.
Cowen
Laura
L
Department of Statistics and Actuarial Science, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada. lcowen@stat.sfu.ca
Schwarz
Carl J
CJ
D000823:Animal Identification Systems; D000818:Animals; D003247:Conservation of Natural Resources / Q000379:methods*; D004868:Equipment Failure; D008954:Models, Biological; D015233:Models, Statistical; D011157:Population Dynamics; D011846:Radio Waves; D045483:Rivers; D012474:Salmon / Q000254:growth & development*; D016019:Survival Analysis; D014861:Washington