Estimates of Tag Loss from Recoveries of Fish Tagged and Permanently Marked

The annual rate r of tag loss may be estimated from observations on the proportion of tag retentions among recoveries of fish which were both tagged and permanently marked at the time of release. In samples recovered t years after release, the proportion of marked fish still bearing tags is assumed to be an estimate of rt. Homogeneity of these t-year loss rates for different year classes may be tested by Chi-square, and the information from all...