期刊
FUNCTIONAL ECOLOGY
卷 15, 期 1, 页码 60-69出版社
BLACKWELL SCIENCE LTD
DOI: 10.1046/j.1365-2435.2001.00495.x
关键词
burrowing; dehydration
类别
1, There is an isometric relationship for allometry of ventricle mass (slope = 0.952) and liver mass (slope = 1.027) and phylogenetic correlations of ventricle and liver mass for museum specimens of 42 species of Australian frogs. 2, There was a strong relationship for ventricle mass with body mass, phylogeny and dehydration tolerance, but not habit, body shape or environmental variables. The relatively large ventricle of more dehydration-tolerant species may also be associated with a higher metabolic scope for activity. There was a strong relationship for liver mass with body mass, phylogeny, habit (burrowing, terrestrial, arboreal), body shape and some environmental variables, but not dehydration tolerance. For burrowing frogs, a relatively large liver is presumably important because it is an energy store during long periods of dormancy and is a source of amino acids for cocoon formation or urea synthesis. For arboreal frogs, a small liver might reduce the cost of transport by limiting body mass, and allow a more elongate shape. 3, Relative ventricle mass of museum specimens is representative of values for field-collected frogs. Relative liver mass is higher for museum specimens; this might be an artefact of museum preservation and/or reflect seasonal or geographic variation.
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