Method for comparing fish growth curves |
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| Authors: | R L Allen |
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| Institution: | 1. Fisheries Research Division , Ministry of Agriculture and Fisheries , P.O. Box 19–062, Wellington, New Zealand;2. Inter‐American Tropical Tuna Commission , Care of Scripps Institution of Oceanography , La Jolla, California, 92037, U.S.A. |
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| Abstract: | The method of comparing growth curves that is described in this paper consists of describing growth for the ith group by the equation Li(t) = ai + bi rt, which is linear in the two parameters ai and bi, and subsequently using the analysis of variance to compare the curves. The advantages of the linear growth equation over the von Bertalanffy equation, l i (t) = ai + bi rt i, are easier analysis and a much simpler interpretation of the differences in the parameters in terms of growth rate and maximum size. An example comparing the growth of male and female red gurnard Chelidonichthys kumu from four areas within the Hauraki Gulf is given. |
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