南盘江马别河三齿拟缨鱼繁殖生物学特性  

Reproductive biology of Pseudocrossocheilus tridentris in Mabie River,a tributary of Nanpanjiang River

作　　者：杨瑞琪 王猛 马卫忠 单承康 金志军 丁骏 金诗语 王泽鑫 焦昱斌 罗思 YANG Ruiqi;WANG Meng;MA Weizhong;SHAN Chengkang;JIN Zhijun;DING Jun;JIN Shiyu;WANG Zexin;JIAO Yubin;LUO Si(School of Life Science and Food Engineering,Huaiyin Institute of Technology,Huaian 223003,Jiangsu,China;Power China Corporation Guiyang Survey,Design and Research Institute Co.,Ltd.,Guiyang 550081,China)

机构地区：[1]淮阴工学院生命科学与食品工程学院,江苏淮安223003 [2]中国电建集团贵阳勘测设计研究院有限公司,贵阳550081

出　　处：《生态学杂志》2025年第2期549-555,共7页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(52100218);贵州省水利科技经费项目(KT202120);国家自然科学基金项目(32002408)资助。

摘　　要：三齿拟缨鱼(Pseudocrossocheilus tridentris)是中国特有的一种野鲮亚科鱼类。本研究于2019年春、夏、秋三个季度在南盘江一级支流马别河采集了206尾三齿拟缨鱼,研究了其雌雄比例、性腺发育、性成熟系数、性成熟大小、卵径特征以及繁殖力。结果表明:三齿拟缨鱼雌雄比例接近1∶1(P>0.05);雌性性成熟个体在整个调查期间均有发现,其中4—6月雌性性成熟个体占比均在80%以上,性成熟系数显著高于其他采样月份(P<0.05);采用Logistic回归方程获得雌、雄初次性成熟体长(SL_(50))分别为136.5和134.3 mm;三齿拟缨鱼绝对繁殖力和相对繁殖力的平均值分别为1039粒·尾^(-1)和18粒·g^(-1),绝对繁殖力与体长和空壳重呈正相关;Ⅲ、Ⅳ、Ⅴ期的卵径频率分布均呈单峰型,推测三齿拟缨鱼为单批次产卵型鱼类。三齿拟缨鱼是一种性成熟个体小、绝对繁殖力较低、单批次产卵型鱼类,属于典型的机会主义。研究结果可以为三齿拟缨鱼资源保护和人工繁殖提供基础资料。Pseudocrossocheilus tridentris,from the Labeoninae subfamily,is an indigenous fish species in China.In this study,206 individuals of P.tridentris were collected during the spring,summer,and autumn of 2019 from Ma⁃bie River,a primary tributary of the Nanpanjiang River.We examined the sex ratios,gonad development,gonado⁃somatic index,size at sexual maturity,egg size,and fecundity of the species.The results showed that the ratio of male to female was close to 1∶1(P>0.05).Matured females were consistently observed throughout the survey pe⁃riod.The majority(over 80%)reached sexual maturity from April to June,exhibiting a significantly higher gonado⁃somatic index compared to other sampling months(P<0.05).Logistic regression analysis revealed the sizes at first sexual maturity(SL_(50))for females and males was 136.5 mm and 134.3 mm,respectively.The mean absolute fecun⁃dity and relative fecundity of P.tridentris was 1039 eggs per female and 18 eggs per gram,respectively.Absolute fecundity was positively correlated with body length and net weight.The frequency distributions of egg diameter for stages Ⅲ,Ⅳ,and Ⅴ showed unimodal patterns,suggesting a single⁃batch spawning strategy.P.tridentris is char⁃acterized as a typical opportunist,displaying sexual maturity at a small body size,relatively low absolute fecundity,and a single⁃batch spawning strategy.The results could provide foundational data for the conservation of P.tridentris and artificial reproduction efforts.

关 键 词：三齿拟缨鱼 繁殖生物学 繁殖力 成熟系数 

分 类 号：S917.4[农业科学—水产科学]