[关键词]
[摘要]
采集怒江水系100尾深水红娘鱼样本,测量其体长、全长、头长、头高、体高、体厚、吻长、眼径、眼后头长、尾柄长、尾柄高、体重共12个形态特征指标。采用方差分析、偏相关分析、通径分析及回归分析,研究深水红娘鱼各形态特征参数间的相关关系,确定影响深水红娘鱼体质量的主要形态特征参数。结果表明:深水红娘鱼的头长、头高、体高、体厚、眼径、眼后头长、尾柄高、体重与体长呈指数相关(P<0.01);而全长、吻长、尾柄长则与体长呈线性相关(P<0.01)。深水红娘鱼体长和体重的拟合方程为:y=0.0231x2.8265(R2=0.9852);深水红娘鱼的b值为2.8265,小于3,为负异速增长,即体长的增长速度要高于体重。头长、头高、体高、眼后头长、尾柄长对深水红娘鱼体质量的影响存在显著关系;对深水红娘鱼体质量的直接作用影响大小依次为:头长(0.184**)>尾柄长(0.154**)>头高(0.136**)>体高(0.099**)>眼后头长(0.026**),建立了深水红娘鱼体质量的最优回归数学模型:y=-89.799 +3.711x1+9.975x2 +11.996x3+6.112x4+7.499x5。
[Key word]
[Abstract]
100 Lepidotrigla abyssalis samples were collected from Nujiang River.Its morphological characteristics were measured, including standard length, total length, head length, head depth, body depth, body width, proboscis length, eye diameter, postorbital length of head, caudal length and caudal depth weight. The correlation between the morphological characteristics and the main morphological parameters affecting the body mass were studied by analysis of variance, partial correlation analysis, path analysis and regression analysis. The results showed that head length, head depth, body depth, body width, eye diameter, caudal depth, weight and body length were exponentially related (P <0.01). Total length, standard length, caudal length and body length showed a linear correlation (P<0.01). The fitting equation between standard length and weight was: y=0.0231x2. 8265 (R2=0.9852). The value of b was 2.8265(less than 3), being of negative allometric growth.The growth rate of the length were higher than that of the weight. Head length, head depth, body depth, postorbital length of head and caudal length were significant related to the weight of Lepidotrigla abyssalis. The sequence of direct effect quality were as follows: head length (0.184**)> caudal length (0.154**)> head depth (0.136**)> body depth (0.099**)> postorbital length of head (0.026**. The optimal multiple regression equation were: y=-89.799 +3.711x1+9.975x2 +11.996x3+6.112x4+7.499x5.
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[基金项目]
国家863科技计划项目(2011AA100803)