Photoperiod and temperature affect reproductive and nonreproductive functions in male prairie voles (Microtus ochrogaster).
Photoperiod and temperature affect reproductive and nonreproductive functions in male prairie voles (Microtus ochrogaster).
复制标题
光周期和温度影响雄性草原田鼠（田鼠）的生殖和非生殖功能。
DOI：
10.1095/biolreprod40.3.481
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发表时间：
1989
影响因子：
3.6
通讯作者：
Willoughby,SB
中科院分区：
文献类型：
--
作者：
Nelson,RJ;Frank,D;Smale,L;Willoughby,SB
成年雄性草原田鼠（Microtus ochrogaster）在21° C或5°C下分别暴露于长（16L：8D）或短（8L：16D）光周期10周。在短日照时间的维护减少睾丸，附睾和精囊质量，也显着抑制生精活动。寒冷的环境温度进一步抑制了暴露在短日照条件下的田鼠性腺大小。几个被毛特征受光周期的影响，但不受温度。增加毛皮密度，毛皮深度，和长度的后卫毛和underhair暴露在短的日子里观察到田鼠。肩胛骨内棕色脂肪和性腺脂肪垫质量以及身体质量显着低于在寒冷的温度比暴露于温暖的环境温度的田鼠田鼠，光周期并不影响这些参数。大约30%的雄性田鼠暴露在短日维持其生殖系统，但他们清楚地处理光周期信息，所有短日男性，无论生殖条件，具有可比的冬季毛皮发展。我们的研究结果表明，在草原田鼠，光周期可能是一个预测性的线索，在自然界中的生殖功能，然而，它似乎是一个更强制性的反应，毛皮的发展是光周期比繁殖。
Adult male prairie voles (Microtus ochrogaster) were housed for 10 wk and exposed to long (16L:8D) or short (8L:16D) photoperiods at 21° or 5°C. Maintenance in short day lengths reduced testicular, epididymal, and seminal vesicle mass and also significantly depressed spermatogenic activity. Cold ambient temperature further suppressed gonadal size in voles exposed to short days. Several pelage characteristics were affected by photoperiod, but not by temperature. Increased fur density, fur depth, and length of guard hair and underhair were observed in voles exposed to short days. Intrascapular brown fat and gonadal fat pad mass as well as body mass were significantly less in voles housed in cold temperatures than in voles exposed to warm ambient temperatures; photoperiod did not affect these parameters. Approximately 30% of the male voles exposed to short days maintained their reproductive systems, yet they clearly processed photoperiodic information; all short-day males, regardless of reproductive condition, had comparable winter pelage development. Our results suggest that in prairie voles, photoperiod may be a predictive cue for reproductive function in nature; however, it appears that pelage development is a more obligatory response to photoperiod than is reproduction.