Statistical Catch-at-Age Methods
In the last chapter, we saw how historical stock sizes and fishing mortality rates could be estimated from catch-at-age data and an assumed natural mortality rate using vpa. There are two major problems with vpa: it can give unreliable estimates for cohorts that have not completely disappeared from the fishery, and it requires an assumption about the natural mortality rate
KeywordsNatural Mortality Fishing Effort Lake Trout Fishing Mortality Fishing Gear
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