生物资源2025，Vol.47Issue(2)：174-184,11.DOI:10.14188/j.ajsh.20241022001
湘江银鮈个体繁殖力与卵径特征的研究
Individual fecundity and egg diameter characteristics of Squalidus argentatus in Xiangjiang River
摘要
Abstract
Fecundity and egg diameter are important indicators of fish reproductive strategies.Squalidus argentatus is mainly distributed in central and southern China and has a strong adaptive ability to the habitat.However,no published study has been carried out in Xiangjiang River basin on the correlation between fecundity and egg diameter of S.argenta-tus and their biological indicators.A total of 65 sexually mature females were collected from Xiangjiang River in May and June 2023 to analyze individual fecundity and egg diameter.The results showed that the body length and body weight of S.argentatus ranged from 60.52 to 142.23 mm and 5.30 to 62.10 g,respectively.Gonadosomatic index ranged from 5.46%to 51.00%,and age ranged from 1 to 3 years.The mean values of absolute individual fecundity,relative fecundi-ty for body length,relative fecundity for body weight,and mature egg diameter were(11 160±7 910)eggs,(100.29±62.37)eggs/mm,(583.87±372.06)eggs/g,and(0.91±0.07)mm,respectively.Absolute fecundity increased with age,relative fecundity for body weight decreased with age.Relative fecundity for body length remained relatively stable across age groups.Both absolute individual fecundity and relative fecundity for body length increased with body length,body weight and ovary weight.However,relative fecundity for body weight and egg diameter showed different rates of in-crease in different body length ranges.Compared with the populations in the Yangtze River,Jialing River and Hanjiang River,the population in Xiangjiang River had the highest absolute individual fecundity,followed by the population in Jialing River,while the population in the lower reaches of the Yangtze River had the lowest absolute individual fecundity.The population in Jialing River had the largest egg diameter,followed by the population in Hanjiang River,while the popula-tion in Xiangjiang River had the smallest egg diameter.It has been found that the individual fecundity and egg diameter of S.argentatus are mainly related to habitat type,and the slow and still water habitat of Xiangjiang River is conducive to the growth and reproduction of S.argentatus.关键词
银鮈/繁殖力/卵径/湘江Key words
Squalidus argentatus/fecundity/egg diameter/Xiangjiang River分类
农业科技引用本文复制引用
杨政飞,高易阳,胡玲玲,向建国,李德亮,黄艳飞..湘江银鮈个体繁殖力与卵径特征的研究[J].生物资源,2025,47(2):174-184,11.基金项目
国家自然科学基金(31772832) （31772832）
国家重点研发计划(2023YFD2400902) （2023YFD2400902）
湖南省现代农业(水产)产业技术体系项目(HARS-07) （水产）
湖南省研究生科研创新项目(CX20230720) （CX20230720）
