Wang, You-Gan and Ellis, Nick (2005) Maximum likelihood estimation of mortality and growth with individual variability from multiple length-frequency data. Fishery Bulletin, 103(2), pp. 380-391.
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We consider estimation of mortality rates and growth parameters from length-frequency data of a fish stock and derive the underlying length distribution of the population and the catch when there is individual variability in the von Bertalanffy growth parameter L∞. The model is flexible enough to accommodate 1) any recruitment pattern as a function of both time and length, 2) length-specific selectivity, and 3) varying fishing effort over time. The maximum likelihood method gives consistent estimates, provided the underlying distribution for individual variation in growth is correctly specified. Simulation results indicate that our method is reasonably robust to violations in the assumptions. The method is applied to tiger prawn data (Penaeus semisulcatus) to obtain estimates of natural and fishing mortality.
|Title:||Maximum likelihood estimation of mortality and growth with individual variability from multiple length-frequency data|
|Journal or Publication Title:||Fishery Bulletin|
|Page Range:||pp. 380-391|
|Issuing Agency:||United States National Marine Fisheries Service|
|Depositing User:||Patti M. Marraro|
|Date Deposited:||02 Aug 2012 19:06|
|Last Modified:||02 Aug 2012 19:06|
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