湖南平江棘胸蛙两性异形和雌性个体生育力  

Sexual dimorphism and female reproductive characteristics in the Paa spinosa of Pingjiang country Hu′nan Province

作　　者：路庆芳[1] 郑荣泉[1] 刘春涛[1] 成斌 

机构地区：[1]浙江师范大学化学与生命科学学院,浙江金华321004 [2]兰溪石蛙研究所,浙江兰溪321100

出　　处：《浙江师范大学学报（自然科学版）》2008年第2期220-224,共5页Journal of Zhejiang Normal University:Natural Sciences

基　　金：浙江省科技攻关重点项目(2006C22031)

摘　　要：测定了湖南平江棘胸蛙成体的体长、体质量、头长、头宽、前肢长、后肢长等形态指标以及雌体的怀卵数量.结果表明:棘胸蛙雄体体长和体质量显著大于雌体.以体长为协变量的多元方差分析表明,雌雄两性在局部形态上不存在显著差异.各局部形态特征指标与体长呈正相关,它们随体长的增长速率在雌雄间无显著差异.棘胸蛙雌体怀卵量与体长和体质量皆成正相关关系,表明棘胸蛙通过增加个体的大小增加繁殖输出.Some morphological traits, including snout-urostyle length （ SUL）, body mass （ BM ）, head length （ HE）, head width（ HW）, forelimb length（ FEE）, hindlimb length（ HLL）, and brood amount（BA） in a population of Paa spinosa, from Pingjiang country, Hu＇nan Province were measured. The significance of a distinctive pattern of sexual dimorphism was also investigated. The results showed that the snout-urostyle length and body mass of adult males were larger than those of adult females. All other morphological traits involved were positively correlated with SUL, and the ANCOVA was used to compare the degree of dimorphism in the frog. The analysis indicated that there were no sexual dimorphism in all characteristics. In Paa spinosa, female frogs could increase reproductive outputs by increasing body sizes, supported by that brood amount was closely correlated with SUL and body mass

关 键 词：棘胸蛙 两性异形 雌性繁殖 怀卵量 

分 类 号：Q958.1[生物学—动物学]