肝毛细线虫对雌性布氏田鼠繁殖参数的影响

2005年5月,在内蒙古锡林郭勒盟阿巴嘎旗北部,研究了肝毛细线虫(Capillaria hepatica)对典型草原区雌性布氏田鼠(Lasiopodomys brandtii)繁殖参数的影响。采用标准夹线法捕获鼠类,对捕获的鼠类进行常规生物学解剖,根据虫卵有无确定肝毛细线虫病感染情况,记录鼠类名称、体长、体重、胴体重、繁殖特征以及肝毛细线虫病感染情况。由于体重是划分鼠类年龄的常用指标之一,结合布氏田鼠的繁殖特征研究数据,采用25.1~55.0 g之间的雌性个体作为本研究分析样本,并将其分为25.1~35.0 g、35.1~45.0 g和45.1~55.0 g体重(年龄)组。采用卡方检验比较分析同一体重(年龄)组内,肝毛细线虫病感染情况与雌性布氏田鼠妊娠率的关系,T检验分析感染情况与胎仔数的关系。结果显示,在各个体重(年龄)组中,感染肝毛细线虫组布氏田鼠雌鼠妊娠率均略低于未感染组,但感染情况与妊娠情况无显著相关关系(P0.05);感染肝毛细线虫布氏田鼠胎仔数低于未感染布氏田鼠,感染情况与胎仔数有显著相关关系(P0.05)。结果表明,肝毛细线虫病对布氏田鼠妊娠率无明显影响,但对布氏田鼠胎仔数有明显的负面影响。

The Influence of Capillaria hepatica on the Breeding Parameters of Female Brandt's Vole (Lasiopodomys brandtii)

The influence of Capillaria hepatica on the breeding parameters of female Brandt''s vole (Lasiopodomys brandtii) was investigated in typical steppe in Abagaqi, Inner Mongolia during May 2005. Standard killing trap method was used to capture rodents, dissected the captured rodents. determined the the infection of C. hepatica according to whether have eggs. The rodents'' name, body length, body mass, carcass mass, reproductive characteristics and the infection of C. hepatica were recorded. As body mass of rodents is one indicator of age, combinaed the previous research data of Brandt''s vole reproductive characteristics, use the female individual which body mass between 25.1-55.0 g as the analysis sample, divided into body mass group of 25.1-35.0 g, 35.1-45.0 g and 45.1-55.0 g. On this basis, compared and analyzed the relationship between the infection situation of C. hepatica and the pregnancy rate by Chi-square test and the relationship between the infection situation of C. hepatica and the number of fetuses by T test of the female Brandt''s vole in the same mass (age) group. Table 1 & table 2 are respectively the relationship between the infection situation of Capillaria hepatica and the pregnancy rate & the number of fetuses of Brandt''s vole in different mass(age) group. The results show that the pregnancy rate of the infected group was slightly lower than the uninfected group. The pregnancy rate of the 25.1-35.0 g mass (age) group were 59.1% and 64.5%; the pregnancy rate of the 35.1-45.0 g mass (age) group were 57.7% and 67.6%; the pregnancy rate of the 45.1-55.0 g body mass (age) group was 65.2% and 67.8%. There have not a significant difference, the infection situation and the pregnancy rate is no significant correlation(P > 0.05). The number of fetuses of the infected group is less than the uninfected group, and the infection situation is significantly correlated with the number of fetuses(P < 0.05). The results show that the infection situation of C. hepatica have not a significant effect on the pregnancy rate of Brandt ''s voles, and have a negative effect on the number of fetuses of Brandt'' voles.