摘要
[目的]研究沼蛙的两性异形状况。[方法]从肇庆地区采集67头沼蛙,测量其形态指标,统计雌性沼蛙的怀卵量,研究沼蛙的两性异形和雌性繁殖特征。[结果]雄性成体沼蛙的平均体长为(75.07±1.21)mm,雌性的平均体长为(78.67±1.23)mm。雌性沼蛙在体长和体重上与雄蛙存在显著差异,说明沼蛙体长和体重均存在显著的两性异形。两性异形程度指数为0.05。沼蛙的局部形态指标皆与体长呈正相关。雌蛙的平均怀卵量为4 916粒/只。雌性沼蛙的怀卵量与体长和体重皆呈正相关。[结论]肇庆地区沼蛙存在明显的两性异形。
[ Objective ] To study the sexual dimorphism of Rana guentheri. [ Method ] 67 heads of R. guentheri were collected from Zhaoqing region to measure their morphological indices and count the brood amount of female frogs. The sexual dimorphism and female reproductive characteristics of R. guentheri were studied. [ Result] The average body length of male R. gueutheri was （75.07 ± 1.21 ）mm, and the average body length of female R. guentheri was （78.67 ± 1.23 ）mm. The body length and body weight of female frogs had significant differences with that of male frogs, which indicated that the body length and body weight of R. guentheri had significant sexual dimorphism. And the sexu- al dimorphism index was 0.05. The local morphological indices of R. guentheri had positive correlations with its body length. The average brood amount of female frogs was 4 916. The brood amount of female frogs had positive correlations with the body length and body weight. [ Conclusion] R. guentheri in Zhaoqing region had obvious sexual dimorphism.
出处
《安徽农业科学》
CAS
2016年第1期5-7,30,共4页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目(31271124)
广东省自然基金项目(s2013010016062)
大学生创新创业训练计划项目(DC201455)
关键词
沼蛙
两性异形
繁殖特征
怀卵量
Rana guentheri
Sexual dimorphism
Reproductive characteristics
Brood amount
作者简介
叶志强（1957-），男，广东罗定人，实验师，从事动物学方面的研究。
通讯作者，教授，从事动物生理生态方面的研究。
