Many lizards autotomize their tails during an encounter with a predator. Tails thrash following autotomy, thus distracting the predator and increasing the probability of escape. Regeneration of the tail occurs rapidly in many species of lizards. We investigated several aspects of the physiology of original and regenerated tails of the gecko Hemidactylus mabouia. Thrashing durations of original and regenerated tails after autotomy were similar, but original tails accumulated significantly more lactate per gram tissue than did regenerated tails. The reduction in lactate concentration paralleled a reduction in protein concentration in regenerated tails suggesting that lower protein concentrations in regenerated tails contributed to lower lactate concentrations. Lactate dehydrogenase (LDH) activity was not significantly different in original and regenerated tails, suggesting that LDH was not responsible for the observed difference in lactate concentrations. Histochemical and immunochemical analyses revealed that the number, size, and type of muscle fibers were not different in original and regenerated tails. Caudal fibers were mainly of the fast, glycolytic type, which presumably support high anaerobic activity of the tail following autotomy.
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. 58 • No. 1