The Effects of Acute and Developmental Temperature on Burst Swimming Speed and Myofibrillar ATPase Activity in Tadpoles of the Pacific Tree Frog,Hyla regilla
- 1 May 2000
- journal article
- research article
- Published by University of Chicago Press in Physiological and Biochemical Zoology
- Vol. 73 (3), 356-364
- https://doi.org/10.1086/316744
Abstract
The effects of acute and developmental temperature on maximum burst swimming speed, body size, and myofibrillar ATPase activity were assessed in tadpoles of the Pacific tree frog, Hyla regilla. Tadpoles from field‐collected egg masses were reared in the laboratory at 15° (cool) and 25°C (warm). Body size, maximum burst swimming speed from 5° to 35°C, and tail myofibrillar ATPase activity at 15° and 25°C were measured at a single developmental stage. Burst speed of both groups of tadpoles was strongly affected by test temperature ( ). Performance maxima spanned test temperatures of 15°–25°C for the cool group and 15°–30°C for the warm group. Burst speed also depended on developmental temperature ( ), even after accounting for variation in body size. At most test temperatures, the cool‐reared tadpoles swam faster than the warm‐reared tadpoles. Myofibrillar ATPase activity was affected by test temperature ( ). Like swimming speed, enzyme activity was greater in the cool‐reared tadpoles than in the warm‐reared tadpoles, a difference that was significant when assayed at 15°C ( ). These results suggest a mechanism for developmental temperature effects on locomotor performance observed in other taxa.Keywords
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