• • 上一篇    下一篇

EP-1不育剂对黑线毛足鼠种群繁殖的影响

宛新荣, 石岩生, 宝祥, 关其格, 于成, 王广和,刘伟, 张知彬, 钟文勤, 焦裕生, 哈斯其木格   

  1. 中国科学院动物研究所,农业虫害鼠害综合治理研究国家重点实验室, 北京
  • 出版日期:2006-12-03 发布日期:2008-07-07

Effect of the contraceptive compound (EP-1)on reproduction of the Djungarian hamster (Phodopus campbelli) in the typical steppe

WAN Xinrong,SHI Yansheng,BAO Xiang,GUAN Qige,YU Chen,WANG Guanghe,LIU Wei,ZHANG Zhibin,ZHONG Wenqin,JIAO Yusheng,HASI Qimuge   

  • Online:2006-12-03 Published:2008-07-07

摘要: 为检验EP-1 不育剂对野外鼠类的施用效果,2004 年在内蒙古锡林郭勒盟阿巴嘎旗白音图嘎800 hm2 草场进行了大田实验,并随后进行了逐月的夹线跟踪调查,分析了不育剂(EP-1) 对黑线毛足鼠种群繁殖的效应。结果表明,EP-1 不育剂对黑线毛足鼠种群繁殖的抑制效果良好,投药区与对照区相比,投药区黑线毛足鼠的子宫损伤率达到80% ,平均胎仔数下降到对照区的2 /3 水平,妊娠率也下降到对照区的20% 。但EP-1 不育剂对雄鼠睾丸下降率的作用不明显。一次性投放EP-1 不育剂,对黑线毛足鼠种群的繁殖作用时间可维持4 个月以上,基本可实现对整个繁殖期的控制成效,这可能与黑线毛足鼠具有储藏种子的习性,储藏药饵多次进食有关。

关键词: 黑线毛足鼠, 繁殖参数, 不育控制

Abstract: In this study we have assessed the effect of the EP - 1 contraceptive compound (quinestrol,33.3%, and levonorgestrel 66.7% ) on recruitment in a field population of the Djungarian hamster (Phodopus campbelli). We applied the EP-1 compound to a wheat bait at a ratio of 1∶10 000, in a 800 ha pasture in Abagaqi for the month of May 2004. An adjacent pasture was used as the control site. Wheat bait was delivered by 1.25 kg per hectare. A trapping census was conducted over 3 days each month from before baiting commenced in May through to September,to assess the reproductive status of the population of Djungarian hamsters. Our analyses show that EP-1 affects the reproductive success of the female hamsters. In the baited area,the EP-1 affected the uterus of 80% of mature females. The uterus was enlarged and remained oedematous for more than 4 months. Compared to the control area,in the baited area,the pregnancy rate and the litter size of females were reduced to 20% and 66% respectively. EP-1 had no effect on the proportion of males in the population with scrotal testes. Our study has shown that EP-1 affects the fertility of female hamsters for more than 4 months following a single application of the compound in the field in spring. This prolonged effect may be related to the food-caching behaviour of the Djungarian hamster. We conclude that EP-1 has the potential to control recruitment for the
duration of the breeding season of the hamster.

Key words: Djungarian hamster (Phodopus campbelli), Fertility control, Reproductivity parameter