Photoperiod influences reproduction in the prairie vole (Microtus ochrogaster).
Photoperiod influences reproduction in the prairie vole (Microtus ochrogaster).
复制标题
DOI：
10.1095/biolreprod33.3.596
复制
发表时间：
1985-10
影响因子：
3.6
通讯作者：
Randy J. Nelson
中科院分区：
文献类型：
--
作者：
Randy J. Nelson
四项实验考察了光周期在草原田鼠季节性繁殖调节中的作用。与长光周期（16L:8D）相比，短光周期（8L:16D）维持10周的成年雄性田鼠睾丸和精囊重量减少，但生育能力未受到损害。从出生到35天的雄性草原田鼠，与长时间的光照周期相比，短时间的光照周期也减少了睾丸和精囊的重量，生育能力也下降了。长昼和短昼的雌性田鼠与长昼或短昼的雄性田鼠配对6天，怀孕率没有差异（分别为93%，86%，89%和88%）。光周期对长昼或短昼雌性与长昼雄性配对的产后怀孕的发生率和时间没有影响。成年雄性草原田鼠对光周期较短的敏感性较低，成年雄性草原田鼠对光周期较短的敏感性较高，而成年雌性草原田鼠对光周期不敏感。这些数据表明，秋季繁殖季节的结束可能是由于种群中缺乏繁殖能力的雄性。
Four experiments examined the role of photoperiod in the regulation of seasonal breeding in the prairie vole. Adult male voles maintained in short (8L:16D) as compared to long (16L:8D) photoperiods for 10 wk had reduced testicular and seminal vesicle weights, but fertility was not impaired. Male prairie voles reared from birth until 35 days of age in short as compared to long photoperiods also had reduced testicular and seminal vesicle weights, as well as diminished fertility. The incidence of pregnancy did not differ between long- and short-day female voles paired for 6 days with long- or short-day males (93%, 86%, 89%, and 88%, respectively). Photoperiod did not affect the incidence or the timing of postpartum pregnancies in long- or short-day females paired with long-day males through the birth of several litters. Adult male prairie voles retain only marginal sensitivity to short photoperiods, maturing males are highly responsive to short days, and adult females are insensitive to photoperiod. These data suggest that termination of the breeding season in the autumn may be due to the lack of fecund males in the population.