We investigated differences in metabolism and locomotor performance of male and female spotted salamanders (Ambystoma maculatum) collected during the breeding season. Male salamanders had faster voluntary crawling speeds than did both gravid and postgravid females. Burst swimming velocity was higher in males than in gravid females but not postgravid females, and there was no difference in burst crawling speeds between the sexes. Oxygen consumption during rest was greater in both gravid and nongravid females than in males, but there was no difference among the three groups in oxygen consumption during locomotion. Both male and postgravid females were able to sustain terrestrial locomotion on the treadmill longer than were gravid females. These findings suggest differences in locomotor performance and energetics between the sexes that may underlie differences in arrival times at breeding sites, frequency of participation in reproductive events, and survival.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 2003 • No. 4