鸭绿沙塘鳢种群繁殖力和初次性成熟研究  

Population Fecundity and First Maturity of Yalu River Sleeper Odontobutis yaluensis

作　　者：段友健 骆小年 李文康 韩牧轩 吴晨 童科 DUAN Youjian;LUO Xiaonian;LI Wenkang;HAN Muxuan;WU Chen;TONG Ke(Key Laboratory of Fish Applied Biology and Aquaculture in North China,Liaoning Province,School of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China)

机构地区：[1]大连海洋大学水产与生命学院,辽宁省北方鱼类应用生物学与增养殖重点实验室,辽宁大连116023

出　　处：《水产科学》2022年第4期652-657,共6页Fisheries Science

基　　金：农业财政专项;辽宁省教育厅辽宁省高等学校“揭榜挂帅”项目;辽宁省高等学校海洋产业技术研究院专项项目(DL201903);辽宁省“百千万人才工程”项目(793018201);大连市科技创新基金资助项目(2018J12SN068);大连海洋大学引进人才启动及在职培养博士启动项目(HDYJ201802).

摘　　要：为探明辽宁东部地区鸭绿沙塘鳢种群的繁殖力和初次性成熟等生物学指标的关系,2018年8月、10月,2019年1月和2020年10月,用地笼(网目1.5cm)和电鱼机分别在鸭绿江支流(大洋河、瑷河和蒲石河)、太子河上游和碧流河上游采集到319尾1~4龄鸭绿沙塘鳢,其中性成熟样本鱼160尾(雌118尾、雄42尾),研究其种群繁殖力和初次性成熟等生物学特性。L_(50%)方法估算结果显示,鸭绿沙塘鳢种群初次性成熟雌鱼体长为64.9mm,雄鱼初次性成熟体长为96.1mm,对应的初次性成熟年龄分别为1.1龄和2.2龄。质量分析法测定表明,鸭绿沙塘鳢种群的平均绝对繁殖力为(1200.25±942.12)粒,平均相对繁殖力为(40.06±11.92)粒/g。绝对繁殖力与体长和性腺质量呈幂函数相关关系,与体质量呈线性相关关系,而与年龄相关性较低。综上所述,鸭绿沙塘鳢是一种繁殖力低、初次性成熟较早的鱼类。In order to understand the population fecundity and first maturity,the fecundity of Yalu River sleeper Odontobutis yaluensis population and the relationship between its biological index in eastern Liaoning were studied.The biological problems of population reproduction and first sexual maturity of 1—4 years old Yalu River sleeper were investigated in 319 samples including sexually mature sample(118 females and 42 males)collected from the tributaries of the Yalu River(Dayang River,Ai River and Pushi River),and the upper reaches of Taizi River and Biliu River in August and October 2018,January 2019 and October 2020,by ground traps with mesh of 1.5 cm and electric fish machine to provide basic biology information for conservation and development of Yalu River sleeper stock.The L_(50%) results showed that the Yalu River sleeper at first maturity had body length of 64.9 mm in female,and body length of 96.1 mm in male,with the corresponding first maturity ages of 1.1 years and 2.2 years,respectively.The weight analysis indicated that the Yalu river sleeper population had average absolute fecundity of(1200.25±942.12)eggs,and the average relative fecundity of(40.06±11.92)eggs/g,with positively correlation between absolute fecundity with body length and body weight,without significant correlation with age.In conclusion,Yalu River sleeper is a fish with low fecundity and early first maturity.

关 键 词：鸭绿沙塘鳢 繁殖力 初次性成熟年龄 初次性成熟体长 

分 类 号：S965.199[农业科学—水产养殖]