| 摘要: |
| 以嵊泗列岛海域2+龄厚壳贻贝同生群养殖个体、同域生长的1+龄紫贻贝同生群养殖个体以及混于厚壳贻贝和紫贻贝养殖筏架中的“杂交贻贝”为实验对象, 以壳宽SW、壳长SL、壳高SH (BD)、OA (壳顶至韧带末端的直线距离)、OB (壳顶至壳背面最高点的直线距离)、OC (壳顶至壳后端最远点的直线距离)、OD (壳顶至壳高性状在腹缘的落点的直线距离)、AB (韧带末端至壳背缘最高点的直线距离)、BC (壳背缘最高点至壳后端最远点的直线距离)、CD (壳后端最远点至壳高性状在腹缘的落点的直线距离)为贝体框架变量, 采用多元分析方法系统比较了三者贝体框架性状对壳重的影响效应。结果表明: (1) 3 种实验贝壳重的变异系数均大于各贝体框架性状, “杂交贻贝”各测定性状的变异系数均为最大, 而厚壳贻贝和紫贻贝间则均接近; (2) 3 种实验贝各贝体框架性状与壳重的相关系数均达到极显著水平(P<0.01), 三者中仅“杂交贻贝”各贝体框架性状间的相关系数也均达到极显著水平(P<0.01); (3) 经通径分析, 厚壳贻贝被保留的3 个贝体框架性状与壳重的复相关指数为0.868, 它们对壳重的直接作用呈OC>SH>SW, 紫贻贝被保留的2 个贝体框架性状与壳重的复相关指数为0.700, 它们对壳重的直接作用呈OC>SW, “杂交贻贝”被保留的3 个贝体框架性状与壳重的复相关指数为0.931, 它们对壳重的直接作用呈SL>SH>OA; (4) 经多元回归分析, 得到了用于估算厚壳贻贝、紫贻贝和“杂交贻贝”壳重的回归方程。 |
| 关键词: 贝体框架性状 壳重 多元分析 厚壳贻贝 紫贻贝 “杂交贻贝” |
| DOI：10.11693/hyhz20140400126 |
| 分类号: |
| 基金项目:浙江省重大科技专项农业重点项目, 2013C02014-3号; 浙江省海洋经济和渔业新兴产业补助项目“嵊泗海域贻贝养殖容量评估及高效养殖技术综合示范”, 2012—2014。 |
附件 |
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| EFFECTS OF SHELL FRAME CHARACTERISTICS ON SHELL WEIGHT OF THREE SPECIES OF MYTILUS IN SHENGSI WATERS OF THE EAST CHINA SEA |
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ZHENG Xiao-Jing1, YANG Yang1, ZOU Li-Chang1,2, REN Su-Yi1, LIU Zu-Yi3, WANG Zhi-Zheng1
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1.Zhejiang Ocean University, Zhoushan 316022, China;2.Fishery Technology Extension Center of Yuyao, Yuyao 315400, China;3.Shengsi County Department of Ocean and Fisheries, Shengsi 202450, China
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| Abstract: |
| Two-year-old population of Mytilus coruscus and one-year-old population of Mytilus edulis from their own cohort of cultured species in Shengsi waters as well as the hybrid mussel in the middle zone between two raft culture systems were selected as experimental subjects. With morphological variables, including shell width (SW), shell length (SL), shell height (SH), straight-line distance from umbo to ligament-end (OA), from umbo to the top of dorsal margin (OB), from umbo to the rear-most point in posterior (OC), from umbo to the foothold of SH in ventral margin (OD), from ligament-end to the top of dorsal margin (AB), from the top of dorsal margin to rear-most point in posterior (BC), and from rear-most point in posterior to the foothold of SH in ventral margin (CD). Multivariate analysis methods were used to study the effect of shell frame characteristics on body weight of three species of Mytilus. The results indicated that first, the variation coefficient of shell weight was greater than that of each shell frame characteristics for three species of Mytilus. The variation coefficients of all phenotypic traits measured in the hybrid mussel were the largest among the three, and that between M. coruscus and M. edulis were close. Second, the correlation coefficients between the shell weight and each shell frame characteristics were extremely significant (P<0.01) for three species of Mytilus. However, only for the hybrid mussel, all the correlation coefficients among shell frame characteristics were extremely significant (P<0.01). Third, according to path analysis, multiple correlation indexes between the reserved frame characteristics and shell weight for M. coruscus, M. edulis and the hybrid mussel were 0.868, 0.700, and 0.931, respectively. The corresponding orders of the direct effect from reserved frame characteristics were listed in turn: OC>SH>SW, OC>SW and SL>SH>OA. Fourth, by using multiple regression analysis, regression equations were obtained to estimate the shell weight for M. coruscus, M. edulis and the hybrid mussel, respectively. |
| Key words: shell frame characteristics shell weight multiple analysis Mytilus coruscus Mytilus edulis the hybrid mussel |
