摘要
测量繁殖后中华鳖(Pelodiscus sinensis)的18项形态特征参数进行性别间比较。单因素多变量方差分析结果表明,中华鳖两性个体形态指标中背甲长、吻突长、吻突宽、头长、头宽、眼间距、背甲宽、裙边宽、裙边长、前肢间距、后肢间距、前肢长、后肢长、腹甲长、腹甲宽、腹甲凹宽差异均不显著。单因素方差分析显示雄性个体的尾长显著大于雌性个体,体重显著小于雌性个体。平行性检测表明尾长和体重两性间均具有平行性。研究发现中华鳖雌性个体边缘大于雄性个体,属于偏雌的两性异形模式,生育力选择解释其形成原因;局部特征雄性尾长显著长于雌性,可作为雌雄个体的鉴定特征。
We measured the sexual size dimorphism in eighteen morphological traits of Pelodiscus sinensis after breeding seasons.One-way MANOVA showed that there were no significant differences in some morphological traits including carapace length,protuberant snout length,protuberant snout width,head length,head width,interorbital distance,carapace width,apron width,apron length,forelimb distance,hindlimb distance,forelimb length,hindlimb length,plastron length,plastron width and inter-plastron concavity distance.One-way ANOVA showed that the tail length of male P.sinensis was significantly larger than the females,while the body mass of males was significantly smaller than the females.The parallelism test showed that the tail length and body weight were parallel.P.sinensis is a female-bias sexual size dimorphism,fecundity selection is likely to be evolutionary reasons.The local characteristic tail length of males is significantly longer than that of females,which can be used as the identification feature of male and female individuals after reproduction.
作者
陈嘉倩
方鑫园
卜伟绍
樊晓丽
CHEN Jiaqian;FANG Xinyuan;BU Weishao;FAN Xiaoli(Faculty of Ecology,Lishui University,Lishui 323000,Zhejiang;Yunhe County Qingjiang Ecological Turtle Breeding Professional Cooperative,Yunhe 323699,Zhejiang)
出处
《丽水学院学报》
2020年第2期39-44,共6页
Journal of Lishui University
基金
浙江省云和县科技局项目“中华乌鳖养殖技术研究”(20180009)
丽水市高层次人才资助项目“中草药添加剂对中华鳖生长性能、肠道菌群及免疫力影响的应用研究”(2019RC06)。
关键词
中华鳖
两性异形
生育力选择
局部特征
Pelodiscus sinensis
sexual dimorphism
fecundity selection
local feature
