Socioendocrine and morphological correlates of paternity in rhesus macaques (Macaca mulatta).
Socioendocrine and morphological correlates of paternity in rhesus macaques (Macaca mulatta).
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DOI：
10.1530/jrf.0.1070059
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发表时间：
1996-05
期刊：
影响因子：
--
通讯作者：
F. Bercovitch;P. Nürnberg
中科院分区：
文献类型：
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作者：
F. Bercovitch;P. Nürnberg
当雌性与几个雄性交配时，在识别雄性和确定导致雄性生殖成功的不同因素方面会出现问题。男性差异繁殖的三个潜在的主要相关因素包括战斗能力、精子竞争和身体状况。我们收集了性成熟猕猴的各种社会内分泌和形态测量，以确定亲子关系的推论。我们研究了大约150只生活在0.3公顷畜栏中的恒河猴，并使用多位点DNA指纹识别了70%的婴儿的父亲。21只雄蜂中有8只繁殖后代，且优势雄蜂比从属雄蜂更成功。犬的大小和年龄都不影响繁殖后代的概率。雄性繁殖成功主要是与雌性交配的数量的结果，这与一系列特征有关，包括高优势度、体型较大、相对较大的睾丸和良好的身体状况。雄性个体的睾丸大小显著大于非雄性个体，但雄性个体产生的子代数量与睾丸大小不相关。在交配季节开始时，公猪的体脂比非公牛多，但交配的能量成本导致交配季节的腹部皮褶厚度减少了50%。我们的结论是，社会地位通过影响与之交配的雌性数量而对父子关系产生重大影响，雄性质量是调节父子关系的关键因素，雄性饲养策略直接影响雄性生殖成功的变异。
When females mate with several males, problems arise in identifying sire and in determining factors contributing to differential male reproductive success. Three potential primary correlates of differential reproduction in males include fighting ability, sperm competition, and body condition. We collected a variety of socioendocrine and morphological measurements from sexually mature rhesus macaques to determine corollaries of paternity. We studied a troop of about 150 rhesus macaques living in a 0.3 ha corral and identified the sires of 70% of infants using multilocus DNA fingerprints. Eight of 21 males sired offspring, and dominant males were more successful than subordinate males. Neither canine size nor age influenced the probability of siring offspring. Male reproductive success was primarily an outcome of the number of females mated with, which was associated with an ensemble of traits including high dominance rank, large body size, relatively voluminous testicles and good body condition. Testes size was significantly larger in sires than in non-sires, but among sires the number of progeny produced was not correlated with testicle size. Sires began the mating season with more body fat than non-sires, but the energetic costs of mating resulted in a 50% reduction in abdominal skinfold thickness during the mating season. We conclude that social status exerts a major impact on paternity by affecting the number of females mated with, that male quality is a critical factor modulating paternity, and that male feeding strategies have a direct influence on variation in male reproductive success.