EFFECTS OF TEMPERATURE, PHOTOPERIOD, AND HIBERNATION ON TESTES OF GOLDEN HAMSTERS
EFFECTS OF TEMPERATURE, PHOTOPERIOD, AND HIBERNATION ON TESTES OF GOLDEN HAMSTERS
复制标题
DOI：
10.1002/jez.1401740307
复制
发表时间：
1970-01-01
影响因子：
--
通讯作者：
LIU, CC
中科院分区：
文献类型：
--
作者：
FREHN, JL;LIU, CC
在100只成年雄性仓鼠（Mesocrietus auratus，Waterhouse）的睾丸上研究了冬眠和1、2、4、8、12、16和20周冷暴露（5 ± 1° C）的影响，仓鼠的初始体重为80至100 g。这些动物中的一半维持在8小时光周期，另一半维持在14小时光周期。在两个光周期下，将对照动物保持在25 ± 1° C下。尸检时，测定睾丸湿重，并制备组织用于定量组织学评价（生精小管直径和生精活性）。在25° C和光照14小时的动物中，睾丸保持不变。然而，在相同温度下光照8小时，睾丸：（1）四周未受影响;（2）在8周时表现出90%的湿重损失;（3）在12周和20周时恢复到初始水平的约66%。在冷暴露的仓鼠中，睾丸的活动在两到四周之间迅速下降，在八周时达到最低重量。那些暴露在14小时光照下的动物在16周后恢复到对照水平，但那些暴露在8小时光照下的动物只显示出轻微的恢复。每周试验时，14小时光照、冷暴露动物的睾丸大于8小时光照、冷暴露动物的睾丸。只有在14小时的光周期下，冬眠动物的睾丸才显著小于冷暴露的非冬眠动物。
The effects of hibernation and 1, 2, 4, 8, 12, 16, and 20 weeks of cold‐exposure (5 ± 1° C) were studied on the testes of 100 adult, male hamsters (Mesocrietus auratus, Waterhouse), having initial body weights of 80 to 100 gm. Half of these animals were maintained on an eight‐hour photoperiod and half on a 14‐hour photoperiod. Control animals, at both photoperiods, were kept at 25 ± 1° C. At the time of autopsy, the wet weights of the testes were determined and the tissue was prepared for quantitative histological evaluation (diameter of the seminiferous tubules and spermatogenic activity). In animals kept at 25° C and 14 hours of light, the testes remained unchanged. With eight hours of light at the same temperature, however, the testes: (1) were unaffected for four weeks; (2) exhibited a 90% loss in wet weight at eight weeks; and (3) recovered to about 66% of the initial level at 12 and 20 weeks. In cold‐exposed hamsters, the testes decreased rapidly in activity between two to four weeks, reaching the lowest weight at eight weeks. Those cold‐exposed animals on 14 hours of light returned to the control level by 16 weeks, but those on eight hours showed only slight recovery. The testes of the 14‐hour light, cold‐exposed animals were larger than those of the eight‐hour light, cold‐exposed animals at each week tested. Only with the 14‐hour photoperiod were the testes of the hibernators significantly smaller than those of the cold‐exposed non‐hibernators.