Cree A, Amey A P, Whittier J M
Department of Zoology, University of Otago, Box 56, Dunedin, New Zealand.
Comp Biochem Physiol A Mol Integr Physiol. 2000 Jun;126(2):275-85. doi: 10.1016/s1095-6433(00)00210-5.
The bearded dragon (Pogona barbata: Agamidae) is a diurnal, oviparous, multi-clutching lizard from Australia. We examined plasma hormonal responses to capture in males and females during the spring breeding season. Corticosterone concentrations at capture (0 h; < or =3 min after capture) were low (males: 1.81+/-0.63 ng/ml; females 2. 23+/-0.47 ng/ml) and within sexes were unrelated to the time of the day, snout-vent length or, in females, reproductive condition (vitellogenic, gravid, assumed spent). Corticosterone concentrations at capture were significantly and inversely correlated with body condition in males, but not in females. Unexpectedly, neither sex showed significant changes in mean concentrations of corticosterone at 3.5 or 24 h after capture compared with 0 h values. Corticosterone concentrations at 3.5 h after capture did not differ between dragons bled at capture or not. Concentrations of progesterone in both the sexes did not change between 0 h and 3.5 or 24 h after capture. Testosterone concentrations in males at capture were moderate (10.1+/-2.2 ng/ml), and unchanged at 3.5 h after capture. The adrenocortical axis of adult bearded dragons in the breeding season seems remarkably unresponsive to capture compared with many other reptiles. Low adrenocortical responses to capture may be a feature of reptiles known to adjust well to captivity.
鬃狮蜥（鬃狮蜥属：鬣蜥科）是一种来自澳大利亚的日行性、卵生、多窝产卵的蜥蜴。我们研究了在春季繁殖季节雄性和雌性鬃狮蜥被捕时的血浆激素反应。被捕时（0小时；被捕后≤3分钟）的皮质酮浓度较低（雄性：1.81±0.63纳克/毫升；雌性：2.23±0.47纳克/毫升），且在性别内部，其与一天中的时间、吻肛长度无关，在雌性中也与生殖状况（卵黄生成期、怀孕、假定已产）无关。被捕时的皮质酮浓度与雄性的身体状况呈显著负相关，但与雌性无关。出乎意料的是，与0小时的值相比，在被捕后3.5小时或24小时，两性的皮质酮平均浓度均未显示出显著变化。被捕时放血的鬃狮蜥与未放血的鬃狮蜥在被捕后3.5小时的皮质酮浓度没有差异。两性在被捕后0小时至3.5小时或24小时之间孕酮浓度均未变化。雄性被捕时的睾酮浓度适中（10.1±2.2纳克/毫升），在被捕后3.5小时未发生变化。与许多其他爬行动物相比，繁殖季节成年鬃狮蜥的肾上腺皮质轴似乎对被捕反应明显不敏感。对被捕的低肾上腺皮质反应可能是已知能很好适应圈养的爬行动物的一个特征。
