This postmaturation growth curve has the same shape as the von Bertalanffy growth curve, and the parameters of the von Bertalanffy model can therefore be expressed using the biological parameters of the Roff model:
The re-parametrization allows fishery biologists to use familiar parameters to describe growth while at the same time giving those parameters more biological meaning than was available previously. This relationship only holds, however, when m1 = m2 = 2/3 and under isometric growth, that is, W = bL3.
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