Context: I am investigating whether the relationship between fish length and apparent survival differs between two areas. These areas have been sampled bimonthly for two years.
Question: Would it be unsuitable to use individual length at last recapture instead of length at first capture? My thinking is, the last known length is closer to the time of any assumed mortality event, and the relationship between initial length and survival may be confounded by different individual growth rates (especially for individuals recaptured throughout the study).
Cheers,
Ben.