湖北农业科学2026，Vol.65Issue(7)：157-161,5.DOI:10.14088/j.cnki.issn0439-8114.2026.07.025
厚唇裸重唇鱼性腺发育研究
Study on gonadal development of Gymnodiptychus pachycheilus
摘要
Abstract
Aiming to systematically analyze the gonadal development and fecundity characteristics of Gymnodiptychus pachycheilus,and their relationships with environmental factors in this fish species,sampling was conducted in the mainstem and tributaries of the upper Yellow River in Qinghai Province from May to June and October to November during 2023-2025.During the domestication peri-od,dead specimens were used for sex identification.The gonadal developmental stages were determined by visual inspection.The go-nadosomatic index(GSI)was calculated using the gravimetric method,and absolute fecundity(F)and relative fecundity(FL)were determined.The correlations between these reproductive parameters and basic biological indicators were analyzed.Results showed that the gonadal development of G.pachycheilus could be divided into six stages,and the main spawning period was concentrated from May to June.The body length of sexually mature females ranged from 263 to 380 mm.The absolute fecundity was 7 592-14 047 eggs,and the relative fecundity was 61-90 eggs per gram.The peak gonadosomatic index(GSI)of males during the spawning season reached 5.55％.The egg diameter distribution indicated that the oocyte development followed a group-synchronous maturation pattern.Fecundi-ty showed a significantly positive correlation with body length and body weight(P＜0.05).Gymnodiptychus pachycheilus exhibited mod-erate fecundity and a group-syhchronous spawning pattern.关键词
厚唇裸重唇鱼(Gymnodiptychus pachycheilus)/性腺发育/繁殖力/性腺指数(GSI)/繁殖生物学Key words
Gymnodiptychus pachycheilus/gonadal development/fecundity/gonadosomatic index(GSI)/reproductive biology分类
农业科技引用本文复制引用
刘勋,张欢,赵贤文,卢宏科,陆星宇,陈楷,刘勇,刘茂春..厚唇裸重唇鱼性腺发育研究[J].湖北农业科学,2026,65(7):157-161,5.基金项目
青海黄河上游水电开发有限责任公司2023年科技开发项目(KY-C-2022-HB06) （KY-C-2022-HB06）
