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Postmetamorphic Growth in Anurans

Frederick B. Turner
The American Midland Naturalist
Vol. 64, No. 2 (Oct., 1960), pp. 327-338
DOI: 10.2307/2422665
Stable URL: http://www.jstor.org/stable/2422665
Page Count: 12
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Postmetamorphic Growth in Anurans
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Abstract

The growth rate of anurans, maximal size, and the time at which sexual maturity is attained may vary between different populations of the same species. In some populations studied most of the growth takes place within a year or two after transformation; after this time growth is slight. At the other extreme are species in which the post-metamorphic growth is spread out over some years, so that the annual increments are not so markedly reduced. Seasonal variation in growth is the rule, even when the growing season is not interrupted by hibernation. Size dimorphism probably arises as a result of differential rates of growth by the sexes. Some populations of the same species may show size dimorphism, others not. Variation in the size of anurans of the same age arise because of differences in time of transformation (within the same season) and because of individual variation in growth rates.

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