Estimates of Mortality Rates from Tag Recoveries

Abstract

Maximum likelihood and weighted " regression estimators for determining the rate of survival and the rate of exploitation from tag recoveries are presented. Single release models for a continuous fishery with exact-time or interval-accuracy recovery data and the use of pre-season releases to estimate typa (1) losses are treated in detail. Discontinuities in the application of fishing effort, recruitment of tagged fish, and incomplete reporting of tags are also considered.