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洞庭平原黑线姬鼠繁殖特性研究

王勇, 陈安国, 李波, 郭聪, 李世斌   

  1. 中国科学院长沙农业现代化研究所,长沙
  • 出版日期:2006-07-29 发布日期:2008-01-05

STUDIES 0N THE CHARACTERISTICS REPR0DUCTION STRIPED FIELD M0USE(APODEMUS AGRARIUS NINGPOENSIS)IN DONGTING PLAIN

WANG Yong, CHEN Anguo, Ll Bo, GUO Cong, LI Shibin   

  • Online:2006-07-29 Published:2008-01-05

摘要: 1986年l0月-1990年l0月在湖南省桃源县和汉寿县的稻作区逐月调查,夹捕黑线姬鼠长江亚种(Apodemus agrarius ningpoensis)2768只,雌性占45.6%.主要繁殖期3-11月,研究期内的月平均怀孕率为48.64±4.0%、平均胎仔数为5.3±0.2只。繁殖指数为2.36±0.29。以上3个参数及种群性比有季节性变化,4-5月和7-l0月为2个妊娠高峰;雄性睾丸下位率和雌性怀孕率有同步变动的趋势.5个年龄组之间,其性比、怀孕率和繁殖指数差异显著;成体怀孕率与同期种群密度呈极显著负相关。并指出冬季繁殖水平取决于气温。

关键词: 黑线姬鼠, 繁殖, 种群密度

Abstract: The characteristics of the reproduction of striped field mouse in taoyuan and hanshou of hunan province were studied from october ,1986 to october 1990.2768 specimens were collected. 1.The total sex ratio of the striped field mouse was 45.6%,and it was below 50%,over years.the sex tatio was over 50% in age group ,and below 50%in age group Ⅱ、Ⅲ、Ⅳ、Ⅴ,and it decreased gradually from group ⅠtoⅤ. 2.the main breeding season of the female mouse wass from March to November.there were two Breeding peaks in a year,the first peak was in April to May,and the other was from july to october.the season of the second breeding peak was different from year to year. 3.In main breeding season,the mean pregnant rate,little size and reproductive index of four years were 48.6±4.0%,5.3±0.2 and 2.36±0.29.All of these and sex ratio fluctuated from month to month.the mean pregnant rate in first breeding peak was 65.5%-49.2% and 61.2%-65.5% from July to October.the mean litter size was biggest in October (6.2 and smallest in June(4.2).the pregnant rate of age group Ⅴwas 44.0%,and Ⅱ was 20.0%,it increased gradually from age group Ⅱ to Ⅴ.the sex ratio,pregnant rate and reproductive indexd among age groups were significantly related. 4.The fluctuations of the rate of testes in scrotum and the rate of female pregnancy were identical. 5.The pregnant rate was significantly negative related to the population density. 6.The result of A.a. ningpoensis was different from that of A.a. pallidior and A.a.manchuricus in breeding season,breeding peak,mean litter size and sex ratio.the breeding level in winter depended on air temperature.

Key words: Striped field mouse, Reproduction, Population density