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- W1987135778 abstract "The sensitivity to harvesting in a discrete-time, age-structured model of an animal population is considered. Density dependence and stochasticity are confined to the first year of the life cycle. Sensitivity is characterized by (a) the characteristic return time and (b) the relative variance (coefficient of variation) of recruitment and yield. Harvesting affects the return time and relative variance through two mechanisms: (1) a displacement of the equilibrium down the stock-recruitment curve and (2) a change in the shape of the “fecundity profile.” The first mechanism occurs in models without age structure and usually has the effect of increasing both return time and relative variance. The second mechanism has opposite effects on return time and relative variance—reducing the former while in most cases increasing the latter. For this model it can be concluded that the overall effect of harvesting is to increase the relative variance of recruitment and yield. The behavior of the return time is ambiguous and is in poor agreement with that of the relative variance." @default.
- W1987135778 created "2016-06-24" @default.
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- W1987135778 date "1983-08-01" @default.
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- W1987135778 title "Recruitment variability and age structure in harvested animal populations" @default.
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- W1987135778 doi "https://doi.org/10.1016/0025-5564(83)90064-0" @default.
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