康县隆肛蛙的两性异形  

Sexual Dimorphism of Feirana kangxianensis

作　　者：黄棨通 龚大洁[1] HUANG Qitong, GONG Dajie(College of Life Sciences, Northwest Normal University, Lanzhou 730070, Chin)

机构地区：[1]西北师范大学生命科学学院,兰州730070

出　　处：《四川动物》2018年第2期149-155,共7页Sichuan Journal of Zoology

基　　金：环境保护部生物多样性保护专项--康县两栖动物监测

摘　　要：测量和比较了采自甘肃省康县的康县隆肛蛙Feirana kangxianensis标本共计90只(雌性48只,雄性42只)。结果表明,康县隆肛蛙成体的头体长、头长、头宽、吻长、鼻间距、眼间距、眼径、鼓膜长、前臂及手长、后肢全长、手长、足长的形态特征在两性间的差异有统计学意义。以头体长为协变量的协方差分析显示,康县隆肛蛙两性的差异均有统计学意义,异形指数达到0.08,雌性与雄性的平均头体长比值为1.091。对所有测量的形态特征与头体长进行一元线性回归分析表明,雌性康县隆肛蛙局部形态特征的生长速度明显大于雄性,其中,吻长、眼间距、眼径、鼓膜长、前臂及手长、手长的两性差异最明显。生育力选择假设能解释康县隆肛蛙的两性异形现象。A total of 90 adults（48 females and 42 males） of Feirana kangxianensis from Kangxian,Gansu province were collected and measured.We found that there were significant differences in snout-vent length,head length,head width,snout length,internasal distance,interorbital distance,eye diameter,tympanum diameter,length of lower arm and hand,hind-limb length,hand length as well as foot length between genders.The results of analysis of covariance indicated that there were significant differences in the 11 morphological characters between genders.The index of sexual dimorphism was0.08 and the average snout-vent length of the females was 9.1% longer than that of males.The linear regression equation between snout-vent length and other 11 characters showed that the females had faster growth rate of snout length,interorbital distance,eye diameter,tympanum diameter,length of lower arm and hand,and hand length than that of males.The hypothesis of the fecundity selection could explain the sexual dimorphism of F.kangxianensis properly.

关 键 词：康县隆肛蛙 两性异形 生育力选择 头体长 

分 类 号：Q959.5[生物学—动物学]