Fleury F, Naulleau G
CNRS Centre d'Etudes Biologiques des Animaux Sauvages, Beauvoir-sur-Niort, France.
Gen Comp Endocrinol. 1987 Nov;68(2):271-7. doi: 10.1016/0016-6480(87)90038-4.
The relationships between the end of hibernation and testicular and thyroid endocrine recrudescence were tested in Vipera aspis by subjecting hibernating vipers to experimental climatic conditions. Vipers kept under artificially warmed conditions (for 3.5 hr during the day to a thermal gradient from 11 to 27 degrees) 1 month before emergence showed an increase in plasma testosterone before vipers exposed to natural conditions (outdoor enclosures) did. The use of different photoperiodic conditions, long, LD 12:12, and short, LD 8:16, shows that photoperiod length has no effect on this increase. For vipers kept under prolonged hibernation (under a uniform temperature of 5 degrees or exposed to natural conditions at the northern limit of the species' distribution), testicular endocrine recrudescence was observed as soon as the first emergence only for the vipers placed at the northern range limit. Whatever the conditions, experimental or natural, the emergence of vipers always corresponds to a weight loss correlated with the increase of plasma thyroxine level. The relationship between the end of hibernation and testicular and thyroid endocrine recrudescence is discussed.
通过让处于冬眠状态的角蝰处于实验性气候条件下，对角蝰冬眠结束与睾丸及甲状腺内分泌复苏之间的关系进行了测试。在出蛰前1个月，处于人工加温条件下（白天3.5小时，温度梯度为11至27摄氏度）的角蝰，其血浆睾酮水平的升高早于处于自然条件下（户外围栏）的角蝰。采用不同的光周期条件，即长光周期（LD 12:12）和短光周期（LD 8:16），结果表明光周期长度对这种升高没有影响。对于处于长时间冬眠状态（在5摄氏度恒温下或在该物种分布的北界处于自然条件下）的角蝰，仅在分布北界的角蝰首次出蛰时就观察到了睾丸内分泌复苏。无论条件是实验性的还是自然的，角蝰出蛰时总是伴随着体重减轻，且与血浆甲状腺素水平升高相关。本文讨论了冬眠结束与睾丸及甲状腺内分泌复苏之间的关系。
