摘要
为探明辽宁地区鸭绿沙塘鳢个体繁殖力,于辽河水系新宾满族自治县太子河下夹河段、碧流河水系碧流河水库上游万福段、鸭绿江水系丹东凤城叆河大堡段采捕卵巢发育至Ⅳ期的鸭绿沙塘鳢雌鱼181尾,采用常规生物学方法比较分析鸭绿沙塘鳢个体繁殖力。结果表明,鸭绿沙塘鳢个体绝对繁殖力(1067.7±829.7)粒,体长相对繁殖力(97.9±56.1)粒/cm,体质量相对繁殖力(55.2±18.1)粒/g。年龄组成以2、3龄为主,且繁殖贡献率分别为44.9%和39.2%。碧流河万福段鸭绿沙塘鳢个体绝对繁殖力、体长相对繁殖力、体质量相对繁殖力均显著高于太子河下夹河段;绝对繁殖力和体长相对繁殖力与体长、体质量、空壳质量、性腺质量显著相关,体质量相对繁殖力与性腺指数显著相关(P<0.01),个体繁殖力均与肥满度无相关性(P>0.05)。3个水系多元线性逐步回归分析显示,个体繁殖力与性腺质量或性腺指数密切相关。卵径频率出现2个峰值,推测鸭绿沙塘鳢为分批产卵类型。本调查结果可为鸭绿沙塘鳢繁殖生物学提供基础数据。
Individual fecundity of Yalu River sleeper Odontobutis yaluensis was investigated in 181 samples of female Yalu River sleeper with gonadⅣstage collected in the Xiajia section(124.6°E,41.3°N)of the Taizi River in Xinbin Manchu Autonomous County of the Liaohe River System,the Wanfu Section(122.5°E,42.2°N)in the upper reaches of the Biliu River Reservoir of the Biliu River Water System and the Dapu Section(124.2°E,40.5°N)of the Ai River in Dandong Fengcheng of the Yalu River System from October to December 2018-2020.It was found that the Yalu River sleeper had mean body length of(10.0±2.1)cm and body weight of(23.50±16.79)g,individual absolute fecundity of(1067.7±829.7)eggs,body length relative fecundity of(97.9±56.1)eggs/cm and the body weight relative fecundity of(55.2±18.1)eggs/g.The ages were primarily derived from two-year-old and three-year-old fishes,with reproductive contribution rates of 44.9%and 39.2%,respectively.There were significantly higher individual absolute fecundity(1682.9±718.5)eggs,relative fecundity of body length(147.3±50.6)eggs/cm and relative fecundity(67.7±19.2)eggs/g of body weight of Yalu River sleeper in the Wanfu Section in the upper rea ches of the Biliu River Reservoir were than those in the the Xiajia section of the Taizi River[(1058.4±879.9)eggs,(91.8±52.3)eggs/cm,(45.9±12.7)eggs/g]and the Dabao Section of the Ai River[(487.9±215.7)eggs,(58.9±19.9)eggs/cm,(56.1±16.0)eggs/g].The individual absolute fecundity and relative fecundity of body length of Yalu River sleeper were significantly correlated with the body length,body weight,gutting body weight and ovary weight,while the relative fecundity of body weight was only significantly correlated with gonadosomatic index(P<0.01),and the individual fecundity was not significantly related to condition factor(P>0.05).Multivariate linear stepwise regression analysis showed that the individual fecundity was closely related to ovary weight or gonadosomatic index.The two egg diameter peaks indicated that Yalu River sleeper
作者
李文康
骆小年
段友健
李姣
吴晨
季辰跃
邓鸿圣
LI Wenkang;LUO Xiaonian;DUAN Youjian;LI Jiao;WU Chen;JI Chenyue;DENG Hongsheng(College of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China)
出处
《水产科学》
CAS
CSCD
北大核心
2024年第1期22-31,共10页
Fisheries Science
基金
辽宁省教育厅高等学校“揭榜挂帅”项目
辽宁省首批“揭榜挂帅”科技攻关项目(2021JH1/10400040)
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)
大连海洋大学第二届“湛蓝学者工程”项目(2021)。
关键词
鸭绿沙塘鳢
个体繁殖力
辽河水系
碧流河水系
鸭绿江水系
卵径
Odontobutis yaluensis
individual fecundity
Liaohe River system
Biliu River system
Yalu River system
egg diameter
