The Shepherd stock and recruitment model (Shepherd, 1982) has been fitted to data from a number of stocks (Garrod. 1982). This note describes the statistical characteristics of the residual variation of data points from the fitted model to investigate the form of the distribution of year-class strength and to detect any trend in the variance of year-class strength with stock size.
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D. J. Garrod (1983) studied this question.
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