扁玉螺(Neverita didyma)表型性状对体重和软体部重的影响效应分析  

EFFECT OF PHENOTYPIC MORPHOMETRIC TRAIT ON BODY WEIGHT AND SOFT-TISSUE WEIGHT OF NEVERITA DIDYMA

作　　者：孙振兴[1] 常林瑞[1] 徐建鹏[1] 

机构地区：[1]鲁东大学生命科学学院,烟台264025

出　　处：《海洋与湖沼》2010年第4期513-518,共6页Oceanologia Et Limnologia Sinica

基　　金：山东省教育厅高校实验技术研究项目;2005-396号;鲁东大学学科建设经费资助项目;2009-2012

摘　　要：采用相关分析和通径分析的方法,研究了扁玉螺的表型形态性状对体重和软体部重的影响。随机抽取2龄扁玉螺100只,分别测定其壳宽、壳高、壳顶至胼胝高、体高、厣长、厣宽、体重、软体部重共8项性状参数,并分别计算了各性状间的相关系数,以及以表型性状为自变量对体重和软体部重作因变量的通径系数和决定系数。结果表明,各表型性状与体重、软体部重之间的相关系数均达到极显著水平(P<0.01)。壳宽对体重和软体部重的直接效应均为最大,对二者的决定程度也最高,是影响体重和软体部重的最主要因素;而厣宽、壳顶至胼胝高和体高的直接作用较小,它们主要通过壳宽的间接作用影响体重和软体部重。因此,对壳宽的直接选择可有效地增加体重和软体部重,对壳顶至胼胝高、厣宽和体高的选择也有助于增加扁玉螺的重量。Effect of phenotypic morphometric trait on body weight and soft-tissue weight of Neverita didyma was studied in correlation and path analysis.A hundred of two-year-old individuals were randomly sampled,from which eight traits were measured including shell width,shell height,height between apex and callus,body height,operculum length,operculum width,body weight,and soft-tissue weight.The correlation coefficients among the eight traits were calculated;and phenotypic traits were used as independent variables and body weight,and soft-tissue weight as dependent ones for path analysis.The results show that all the correlation coefficients between each phenotypic trait and body weight or soft-tissue weight are at extremely significant level（P0.01）.The shell width is the key effective factors.Direct selection of shell width is effective for increasing body weight and soft-tissue weight of Neverita didyma,followed by the heights between apex and callus,and operculum width and body height come the second.

关 键 词：扁玉螺 表型形态性状 相关分析 通径分析 多元分析 

分 类 号：S917.4[农业科学—水产科学] Q953[生物学—动物学]