CAJ | 학술논문

实验研究了来自浙江余姚翘嘴红鲌(Erythroculter ilishaeformis)成体的体重、躯干重和16个形态特征指标的两性异形,以及雌体个体生育力.结果显示,翘嘴红鲌雌雄个体除背鳍基前距外其余形态学指标以及体重和躯干重均无显著的两性差异,特定体长的雌鱼的背鳍基前距显著大于雄鱼.线性回归分析表明,翘嘴红鲌的怀卵数量与体长和体重呈显著的正相关,由此推断雌鱼主要通过个体体长的增长和体重的增加来提高个体生育力.由以上结果我们推断水生环境因子抑制了生育力选择和性选择对翘嘴红鲌两性异形进化的影响.
실험연구료래자절강여요교취홍백(Erythroculter ilishaeformis)성체적체중、구간중화16개형태특정지표적량성이형,이급자체개체생육력.결과현시,교취홍백자웅개체제배기기전거외기여형태학지표이급체중화구간중균무현저적량성차이,특정체장적자어적배기기전거현저대우웅어.선성회귀분석표명,교취홍백적부란수량여체장화체중정현저적정상관,유차추단자어주요통과개체체장적증장화체중적증가래제고개체생육력.유이상결과아문추단수생배경인자억제료생육력선택화성선택대교취홍백량성이형진화적영향.
@@@@The sexual dimorphism in eighteen morphological traits and female individual fecundity of Erythroculter ilishaeformis from the river in Yuyao,Zhejiang Province,were measured in this study. Our results showed that there was no significant difference in other seventeen morphological traits excepted the dorsal fin precoxal length. Adult females of E.ilishaeformis were significantly larger than adult males in dorsal fin precoxal length after accounting for body length. The linear regression showed that the individual fecundity was positively related with body length and body mass. It is suggested that adult females increase the individual fecundity through increasing the body mass and body length. According to our results,we inferred that the aquatic environmental factors restrain the effect of fecundity selection and sexual selection on the evolution of Sexual dimorphism in E.ilishaeformis.