Weil M R
Comp Biochem Physiol A Comp Physiol. 1985;81(3):585-7. doi: 10.1016/0300-9629(85)91030-8.
Plasma and testicular testosterone levels were determined during three periods (spring, summer and autumn) of the active season in the common garter snake, Thamnophis sirtalis. Plasma testosterone levels were highest in spring and lowest in summer. Testicular testosterone levels were higher in spring than autumn but not significantly different in spring than summer or in summer than autumn. This study presents further evidence that in reptiles, plasma and testicular androgen cycles are not necessarily parallel.
在活跃季节的三个时期（春季、夏季和秋季）测定了东部束带蛇（Thamnophis sirtalis）的血浆和睾丸睾酮水平。血浆睾酮水平在春季最高，夏季最低。睾丸睾酮水平在春季高于秋季，但在春季与夏季之间、夏季与秋季之间无显著差异。这项研究进一步证明，在爬行动物中，血浆和睾丸雄激素循环不一定是平行的。
