高原鼠兔种群的性比  

The Sex Ratio of Plateau Pika′s Population

作　　者：王金龙[1] 魏万红[1] 张堰铭[1] 殷宝法[1] 曹伊凡[1] 

机构地区：[1]中国科学院西北高原生物研究所,西宁810001

出　　处：《兽类学报》2004年第2期177-181,共5页Acta Theriologica Sinica

基　　金：中国科学院知识创新工程试点项目(KSCX2-1-03和KSCX2-SW-103);国家自然科学基金资助项目(39770106;30270200)

摘　　要：The sex ratio(♂/♀) of plateau pika′s(Ochotona curzoniae) population was studied by re-captured method in the region of the Haibei Alpine Meadow Ecosystem Research Station, Northwest Institute of Plateau Biology, the Chinese Academy of Sciences from April of 2001 to August of 2002. The result showed that there was no significant difference from 1∶1 in adult′s sex ratio in whole breeding season,whereas the sex ratio of juvenile had some fluctuations among different age stages. The sex ratio of the second litter varied significantly from embryo to 60-day-old, but no difference at the first and the third litter. We concluded it was caused by conflict between maternal strategy and juvenile′s strategy. No significant differences of sex ratio were found both in adult and juvenile between 2001 and 2002. The sex ratio of plateau pika before and after overwintering did not vary. In summary, we proposed that sex ratio of plateau pika′s population was not influenced by exogenous factors, but some self-regulation mechanisms may be involved.The sex ratio(♂/♀) of plateau pika′s(Ochotona curzoniae) population was studied by re-captured method in the region of the Haibei Alpine Meadow Ecosystem Research Station, Northwest Institute of Plateau Biology, the Chinese Academy of Sciences from April of 2001 to August of 2002. The result showed that there was no significant difference from 1∶1 in adult′s sex ratio in whole breeding season,whereas the sex ratio of juvenile had some fluctuations among different age stages. The sex ratio of the second litter varied significantly from embryo to 60-day-old, but no difference at the first and the third litter. We concluded it was caused by conflict between maternal strategy and juvenile′s strategy. No significant differences of sex ratio were found both in adult and juvenile between 2001 and 2002. The sex ratio of plateau pika before and after overwintering did not vary. In summary, we proposed that sex ratio of plateau pika′s population was not influenced by exogenous factors, but some self-regulation mechanisms may be involved.

关 键 词：高原鼠兔 种群 性比 生态学 

分 类 号：Q959.836[生物学—动物学] Q958.15