摘要
对白斑狗鱼Esoxlucius和黑斑狗鱼Esoxreichrti的个体繁殖力进行了比较,并对两种狗鱼的个体繁殖力与其各主要体征指标的关系进行分析。结果表明:白斑狗鱼绝对繁殖力(F)为3 808～173 500粒/尾,黑斑狗鱼的F为5 380～184 630粒/尾,两种狗鱼的个体相对繁殖力(FW)差异极显著(P<0.01),F和相对繁殖力(FL)差异不显著。F、FW和FL与各主要体征指标呈正态分布,白斑狗鱼F、FW和FL与各主要体征指标关系密切;黑斑狗鱼F与各主要体征指标关系密切,FW和FL与各体征指标的关系均不密切。白斑狗鱼的F、FL、FW与各体征指标的多元逐步回归方程分别为F=-50090.38+421.661Wo-74.083Wn+205.845L,FL=6.977+0.271Wo,FW=-5.88+0.37L+0.514M;黑斑狗鱼F、FL、FW与各体征指标的多元逐步回归方程分别为F=-19300.721+33.262Wn+728.415M,FL=-20.948+0.129Wn+2.056M-0.071W,FW=15.743+0.661M。根据两种狗鱼的卵径频率分布图判断,白斑狗和黑斑狗鱼都为一次性产卵鱼类。
The individual fecundity and the related physical characters were evaluated between northern pike Esox lucius and Amur pike Esox reichrti.The results showed that northern pike had absolute fecundity（F） between 3 808 and 173 500 eggs and Amur pike between 5 380 and 184 630 eggs.There was very significant difference in individual relative fecundity to weight（FW） between northern pike and Amur pike（P0.01）,while there was no significant difference in individual relative fecundity to length（FL） between northern pike and Amur pike（P0.05）.F,FW and FL were all found to show normal distribution,and the relationships among F,FW and FL and main physical characters were close in northern pike.In Amur pike,only the relationship between F and main physical characters was also close related in stead of the others.The multiple stepwise regression equations of F,FL and FWin northern pike,and the main physical character measures were F=-50090.38＋421.661Wo-74.083Wn＋205.845L,FL=6.977＋0.271 Wo and FW=-5.88＋0.37L＋0.514M,respectively.For Amur pike,the multiple stepwise regression equations of F,FL and FW and the main physical character measures were F=-19300.721＋33.262 Wn ＋728.415M,FL=-20.948＋0.129 Wn ＋2.056M-0.071W and FW=15.743＋0.661M.Both pike spawn only once a year according to the frequency distribution of ovum diameter.
出处
《大连水产学院学报》
CSCD
北大核心
2010年第6期511-517,共7页
Journal of Dalian Fisheries University
基金
黑水研基本科研专项(2008HSYZX-ZH-11)
环保部全国生物物种资源联合执法检查和调查项目(物种08-二-9)
农业部鱼类生物育种实验室资助项目(2008NYBZS-11)
关键词
个体绝对繁殖力
个体相对繁殖力
卵径
白斑狗鱼
黑斑狗鱼
individual absolute fecundity
individual relative fecundity
ovum diameter
Esox lucius
Esox reichrti
