The Richards (1959) function was used to describe the maturity schedule. The following equation, reported by Schaefer (1998) was fitted to the proportion of mature females by 5-cm FL interval:<br>PFL = [1 − (1 − m)e−K(FL−c )]1/(1−m)<br>where PFL is proportion mature at a fork length (FL) in centimeters, and m, K, c are the parameters. The parameters were estimated using nonlinear least squares function in R software (ver. 3.1.2).
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