Yield-per-recruit analysis of eastern king prawns Penaeus plebejus Hess, in eastern Australia [Queensland; New South Wales].
1990
Glaister J.P. | Montgomery S.S. | McDonall V.C.
Population parameters were calculated via a series of tagging experiments. Recapture rates of tagged prawns were examined for each point release (local recapture) and for the State as a whole (sequentially applied effort), the difference providing estimates of emigration rate. For 1979 and 1980, respectively, fishing mortality estimates ranged between 0.04 and 0.08 per week, depending upon number of vessels per port; emigration was estimated to be 0.13 and 0.18 per week for the two years, tagging mortality (0.08 per week), and all other losses other than by tagging and emigration at 0.06 and 0.08 per week. A compartmented, time-lagged model of the fishery was used to predict changes in yield per recruit as a consequence of changes in management strategy and to describe the relationship between fishing effort and yield per recruit. The analyses suggested that limited benefits in terms of yield per recruit would eventuate from substantial increases in effort but that substantial decreases in catch per effort were likely.
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