高原鼠兔繁殖季节血液指标、血气及性激素变化

Blood Indices,Blood Gas and Sex Hormones in Plateau Pika( Ochotona curzoniae) During Breeding Season

2014年5月至2014年10月间,在青海省海北自治州祁连县野牛沟乡达玉村附近,从动态的角度研究高原鼠兔在其生境地繁殖季节前后血常规、血气和性激素的变化,并与繁殖期间的各种环境因子相关联,探讨鼠兔繁殖策略对环境及行为的响应。结果表明,可将该地区高原鼠兔的繁殖期分为过渡恢复阶段(5月以前);繁殖旺盛阶段(5月下旬~7月中旬);繁殖抑制阶段(7月下旬~9月下旬);繁殖静止阶段(10月及10月以后)4个阶段,不同的繁殖阶段高原鼠兔在体重、繁殖指数、血常规指标、血气指标、睾丸相对重量、甲状腺素及性激素水平上都表现出明显的季节性变化。说明高原鼠兔在行为和繁殖力变化上表现出明显的季节性变化,食物、光周期、温度等环境限制因子能够明显影响高原鼠兔的繁殖动态,雌雄鼠兔的繁殖投入不同最终导致生理指标的不同。

Plateau pika （ Ochotona curzoniae, also called black - lipped pika） is a small non - hi- bernating diurnal lagomorph which inhabits alpine meadows on the Tibetan plateau, China. During May to October 2014, we studied pika blood indices, blood gas and sex hormones from a dynamic perspective during the breeding season in the village of Dayu, Yeniugou, Haibei prefecture, Qinghai province （ E99°16＇, N38°42＇, 3 900 masl）. Various environmental factors were associat- ed with reproductive behavior. Our results indicated that the breeding season of pika in this area can be divide into 4 stages： （ i ） The restoration phase, before May; （ ii ） The sexually active phase, in late - May to mid - July; （iii） The inhibition phase, in late - July to late - September