Pope N S, Gordon T P, Wilson M E
Biol Reprod. 1986 Sep;35(2):353-9. doi: 10.1095/biolreprod35.2.353.
Rhesus monkeys housed outdoors exhibit a distinct breeding season limited to the fall and winter months. Four groups of female rhesus monkeys, multiparous nonlactating (MNL; n = 8), multiparous lactating (ML; n = 6), primiparous lactating (PL; n = 3) and nulliparous first-time ovulators (N; n = 6) were studied to investigate the influence of age, parity, and social dominance rank on the parameters of the breeding season. MNL exhibited the longest season (146 days), and PL the shortest (70 days), with N (106 days) and ML (89 days) intermediate. PL females also had a significantly reduced percentage of normal ovulations compared to other groups. Neither body weight nor estimates of body fat were related to either the timing of the ovulatory season or the quality of ovulations within the season. Parity and social dominance rank were significantly related to the percentage of normal ovulations (r = 0.85), with low-ranking, primiparous females exhibiting the fewest normal ovulations. These data indicate that the presence of a suckling infant acts synergistically with environmental factors to determine the parameters of the breeding season. Furthermore, postpubertal females may be more responsive to those factors that terminate the breeding season, and some factor independent of body weight but associated with low social dominance rank and/or primiparity renders females less capable of normal luteal function during the breeding season.
饲养在户外的恒河猴有一个独特的繁殖季节，仅限于秋季和冬季。研究了四组雌性恒河猴，即经产非哺乳期（MNL；n = 8）、经产哺乳期（ML；n = 6）、初产哺乳期（PL；n = 3）和未产首次排卵（N；n = 6），以研究年龄、产次和社会优势等级对繁殖季节参数的影响。MNL的繁殖季节最长（146天），PL最短（70天），N（106天）和ML（89天）居中。与其他组相比，PL雌性正常排卵的百分比也显著降低。体重和体脂估计值均与排卵季节的时间或该季节内的排卵质量无关。产次和社会优势等级与正常排卵的百分比显著相关（r = 0.85），低等级的初产雌性正常排卵最少。这些数据表明，哺乳婴儿的存在与环境因素协同作用，共同决定繁殖季节的参数。此外，青春期后的雌性可能对那些终止繁殖季节的因素更敏感，并且一些与体重无关但与低社会优势等级和/或初产相关的因素使雌性在繁殖季节期间黄体功能正常的能力较低。
