【摘要】 调查地震灾后北川四川短尾鼩种群数量和繁殖特征的动态变化,研究其种群动态变化规律,为控制害兽提供科学依据。2009年7月、10月和2010年1月、4月、7月、10月在居民区、农田、林地3种生境采用夹夜法调查,收集标本,分类鉴定,计算捕获率,并解剖观察其繁殖状况,根据其性比、怀孕率、胎仔数、睾丸下降率、繁殖指数等指标分析繁殖特征。结果表明,四川短尾鼩主要栖息于农田及居民区,是北川新县城农田、居民区的主要害兽,占总捕获数的83.48%;种群性比为0.96;四川短尾鼩平均捕获率为10.34%,不同季节均有捕获,秋季(10月)为种群数量最高峰;在春(4月)、夏(7月)季为繁殖高峰期,怀孕率为69.57%和56.25%;调查期间平均胎仔数为3.72只,平均睾丸下降率为51.41%;灾后对四川短尾鼩种群数量和种群繁殖特征进行中长期的监测是必要的。更多还原

【Abstract】 To survey the dynamic change of population quantity and reproduction characteristics of Anourosorex squamipes in Beichuan County after the disastrous earthquake and study the change rules of the population dynamics to provide a basis for controlling harmful animals.The survey was carried out on 3 living invironments in Jul.,Oct.2009 and in Jan.,Apr.,Oct.2010 including residential area,farmland and woodland to collect the samples,classify the identifications,and calculate capture rate whose reproduction situations were dissected and observed.The reproduction characteristics were analyzed based on the ratio of male to female,gestation rate,felus quantity,orchis reduction rate,reproduction index.The results show:Anourosorex squamipes mainly live in farmland and residential area,being the main harmful animal area of the Beichuan New County town,covering 83.48% of the total of the collected rats.The ratio of male to female of the population was 0.96;Anourosorex squamipes can be captured at different seasons,covering 10.34%;The population quantity reaches maximum peak in autumn(Oct.);its reproductive period peak was in spring(Apr.),in summer(Jul.),its gestation was 3.72 during research period;Average orchis rate was 51.41%.It is necessary to monitor population quantity of Anourosorex squamipes and population reproductive charcteristics for long term after disaster.更多还原