Mean Value and Variability of Fish Catches in Fluctuating Environments
- 1 January 1976
- journal article
- research article
- Published by Canadian Science Publishing in Journal of the Fisheries Research Board of Canada
- Vol. 33 (1) , 189-193
- https://doi.org/10.1139/f76-025
Abstract
The mean value of the catch and its variability due to environmental fluctuations are analyzed for a very general stock-recruitment model. Particular attention is devoted to the comparison of two standard fishing strategies (constant effort and constant escapement) in terms of mean catch, variance in catches, and maximum deviation of catch. It is demonstrated analytically that constant escapement policies should always give higher mean catch, but should give higher catch variance and more extreme catches only under certain conditions of environmental variability.This publication has 2 references indexed in Scilit:
- Some Effects of Simulated Long-Term Environmental Fluctuations on Maximum Sustained YieldJournal of the Fisheries Research Board of Canada, 1969
- Maximum Sustained Yields from Fluctuating Environments and Mixed StocksJournal of the Fisheries Research Board of Canada, 1958