A Comparative Study on Histology of Testes in Macaca nemestrina, M.fascicularis and M.fuscata
A Comparative Study on Histology of Testes in Macaca nemestrina, M.fascicularis and M.fuscata
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猕猴、束状猕猴和暗色猕猴睾丸组织学的比较研究
DOI：
10.1537/ase.105.99
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
D. Sajuthi
中科院分区：
文献类型：
--
作者：
T. Enomoto;K. Matsubayashi;M. Nakano;Y. Nagato;T. L. Yusuf;D. Sajuthi
为了检验睾丸形态进化机制的假设，对三种猕猴的精子发生活性进行了组织学比较。通过对六只成年食蟹猕猴、六只成年猪尾猕猴和五只成年日本猕猴进行活检获得睾丸样本。在日本猕猴中，分别在十月（交配季节）和四月（非交配季节）采集了两次样本。显微镜观察发现，猪尾猕猴的一些生精小管表现出典型的退化特征，而其他两个物种则没有发现这种特征。与其他两个物种相比，食蟹猕猴的精子细胞顶体系统最为发达。与非交配季节的日本猕猴相比，在食蟹猕猴和猪尾猕猴中经常发现生精小管表现出活跃的精子发生。与交配季节的食蟹猕猴和日本猕猴相比，猪尾猕猴经常观察到仅含有一种精子细胞阶段的生精上皮。这些发现表明，生精活性在食蟹猕猴中最为突出，并且精子竞争机制在该物种的进化过程中影响了睾丸结构。
For the purpose of examining hypotheses on the evolutionary mechanism of testis morphology, histological comparisons of spermatogenetic activities were carried out in three macaque species. Testis samples were obtained by biopsies from six adult crab-eating macaques, six adult pig-tailed macaques and five adult Japanese macaques. In the Japanese macaques, samples were taken twice in October (mating season) and April (non-mating season), respectively. Microscopic observations revealed that some seminiferous tubules of the pig-tailed macaques showed characteristic features of degeneration, which were not found in the other two species . The acrosomic system of the spermatids of crab-eating macaques was most developed , compared with the other two species. Seminiferous tubules showing active spermiogenesis were frequently found in crab-eating macaques and in pig-tailed macaques, compared with Japanese macaques in the non-mating season . The seminiferous epithelia in stages containing only one type of spermatids were frequently observed in pig-tailed macaques, compared with those in crab-eating macaques and in Japanese macaques in the mating season . These findings suggest that spermatogenic activity is most prominent in the crab-eating macaques and that the mechanism of sperm competition has affected testicular architecture of this species in the course of its evolution.