(Date file: lakemary) In fisheries studies, the most commonly used mean function for expected length of a fish at a given age is the von Bertalanffy function (Bertalanffy, 1938; Haddon and Haddon,...

(Date file: lakemary) In fisheries studies, the most commonly used mean function for expected length of a fish at a given age is the von Bertalanffy function (Bertalanffy, 1938; Haddon and Haddon, 2010), given by
 The parameter L∞ is the expected value of Length for extremely large ages, and so it is the asymptotic or upper limit to growth, and K is a growth rate parameter that determines how quickly the upper limit to growth is reached. When Age = t0, the expected length of the fish is 0, which allows fish to have nonzero length at birth if

t₀
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