Document Detail

The effect of metamorphosis on the repeatability of maximal locomotor performance in the Pacific tree frog Hyla regilla.
MedLine Citation:
PMID:  9359373     Owner:  NLM     Status:  MEDLINE    
Measuring the repeatability of inter-individual differences in locomotor performance is an important first step in elucidating both the functional causes and the ecological consequences of performance variation. Thus, repeatability of whole-animal performance traits provides a crucial link between functional and evolutionary biology. In the present study, repeatability of maximal burst locomotor performance was estimated for a single population of the Pacific tree frog Hyla regilla. Animals were reared individually from eggs through metamorphosis in the laboratory. Maximum burst swimming speed of tadpoles was measured before metamorphosis (Gosner stage 37) and again at the onset of the metamorphic climax (stage 42). Maximum jump distance was measured on the same individuals as juvenile frogs. Locomotor performance was repeatable over a 24h period for both premetamorphic tadpoles and juvenile frogs. Performance was not repeatable across metamorphosis or between any two of the three developmental stages investigated. A high-performance individual at one developmental stage does not necessarily retain that performance advantage at another stage. This lack of repeatability contrasts sharply with several previous studies on non-metamorphosing vertebrates, but concurs with a single previous study on a metamorphosing salamander. Metamorphosis appears to place strict temporal constraints on individual consistency in locomotor ability.
T B Watkins
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  The Journal of experimental biology     Volume:  200     ISSN:  0022-0949     ISO Abbreviation:  J. Exp. Biol.     Publication Date:  1997 Oct 
Date Detail:
Created Date:  1997-12-09     Completed Date:  1997-12-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0243705     Medline TA:  J Exp Biol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  2663-8     Citation Subset:  IM    
Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, USA.
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MeSH Terms
Anura / physiology*
Metamorphosis, Biological*

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