摘要
湿重是影响贝类养殖企业效益的最直接体现,也是选育过程中的重要参考指标。为研究不同贝龄岩扇贝(Crassadoma gigantea)外部形态性状对湿重的影响,分别测量了100个6月龄、18月龄岩扇贝的壳长(l1/mm)壳高(l2/mm)、壳宽(l3/mm)和湿重(w/g),通过逐步回归的方法对4个性状数据进行通径分析,结果表明所有测量数据间的相关系数均达到极显著水平(P<0.01)。壳高对6月龄岩扇贝湿重直接作用最大,壳宽次之,壳长对湿重的直接通径系数不显著(P>0.05);壳长对18月龄岩扇贝湿重直接作用最大,壳宽次之,壳高对湿重的直接通径系数不显著(P>0.05)。决定系数与通径分析的结果一致。通过多元回归法建立了6月龄、18月龄岩扇贝外部形态性状与湿重之间的回归方程。6月龄:w=-6.406+0.277l2+0.179l3,R2=0.846。18月龄:w=-11.525+0.419l1+0.927l3,R2=0.925。
Wet weight directly reflects the benefit of shellfish breeding enterprises and is also an important reference index in the selection process.The shell length（l1/mm）,shell height（l2/mm）and shell width（l3/mm）of 100 Crassadoma gigantean（age of 6 months and 18 months）were measured respectively in order to study the effect of external form on wet weight（w/g）.The results showed that the correlation coefficients of all the measured data reached a very significant level（P〈0.01）through the stepwise regression method.Shell height has the greatest direct effect on the wet weight of the 6-month-oldCrassadomagigantea,theshellwidthisthesecond,thedirectpath coefficient of the shell length to wet weight is not significant（P〉0.05）;the shell length has the greatest direct effect on the wet weight of Crassadoma gigantea of 18 months,the shell width is the second,the direct path coefficient of the shell height to wet weight is not significant to the wet weight（P〉0.05）.The determination coefficient is consistent with the results of the path analysis.The regression equation of the external morphological characters and wet weight of Crassadoma giganteaof 6 months and 18 months was established by multiple regression method.6-month-old：w=-6.406＋0.277 l2＋0.179 l3,R2=-0.846;18-month-old：w=-11.525＋0.419 l1＋0.927 l3,R2= 0.925.This study provides basis for selecting breeding and determining seedling time for Crassadoma gigantea.
出处
《河北渔业》
2018年第2期23-28,38,共7页
基金
辽宁省海洋与渔业厅项目(201214)
大连市海洋与渔业局项目(2012011)
