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Correlations of Quantitative Parameters of Fecundity in Amphibians

Mitsuru Kuramoto
Evolution
Vol. 32, No. 2 (Jun., 1978), pp. 287-296
DOI: 10.2307/2407596
Stable URL: http://www.jstor.org/stable/2407596
Page Count: 10
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Correlations of Quantitative Parameters of Fecundity in Amphibians
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Abstract

Female standard weight, clutch weight, clutch size, and egg weight were recorded from 12 species of Japanese amphibians, and intraspecific and interspecific correlations of these parameters were examined. Clutch weight showed significant correlation with standard weight both within and between species. Clutch size was correlated with clutch weight, but not with standard weight in some species. Interspecific correlation between clutch size and clutch weight as well as between clutch size and standard weight, though significant, did not seem to be extrapolations from intraspecific correlations because the latter regressions differed remarkably from one species to another. The same was true for significant interspecific correlation between egg weight and clutch weight among six lentic water-breeding frogs. Clutch weight: standard weight ratio varies among different species, and may serve as an indicator of reproductive effort of each species. Species-specific allocation of clutch weight between clutch size and egg weight are discussed in relation to the species differences in reproductive mode and to selection favoring specific allocation in each mode.

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