中华鳖的体重与形态特征的关联分析

Correlation analysis of morphological traits and body weight of Chinese soft-shelled turtle (Trionysx sinesis)

为确定影响中华鳖体重的主要外部形态指标,对100日龄和300日龄中华鳖的背甲长、腹甲长、背甲宽及体高与体重进行了测量与分析。相关分析表明,中华鳖的背甲长、腹甲长、背甲宽及体高与其体重呈显著正相关(P<001),100日龄中华鳖腹甲长、背甲长、体高及背甲宽与体重的相关系数分别为0.891、0.651、0.907、0.671;300日龄中华鳖背甲长、腹甲长、背甲宽及体高与体重的相关系数分别为0.724、0.606、0.625、0.424。通径分析及决定系数分析表明,100日龄中华鳖腹甲长对体重的直接影响最大(R=0.541),其次为背甲长(R=0.469),腹甲长与背甲长对体重的决定程度为0.909;300日龄中华鳖体高对体重的直接影响最大(R=0.711),其次为背甲长(R=0.402),体高与背甲长对体重的决定程度为0.785。

To determine the main morphological traits that influence the body weight of the Chinese soft-shelled turtle, Trionysx sinesis, carapace length, plastron length carapace width and body height of 100 day-old and 300 day-old turtles were measured. Results showed that carapace length, carapace width, body height and plastron length were significantly correlated with body weight（P〈0.01）, the correlation index were 0.891, 0.651, 0.907 and 0.671 for 100 day-old T. sinesis and 0.724, 0.606, 0.625 and 0.424 for 300 old-day T. sinesis, respectively. Path coefficients and coefficient of determination analysis indicated that carapace length and plastron length significantly affected body weight for 100 old-day turtle, and the direct effect index was 0.541 and 0.469, respectively. The coefficient of determination of the two attributes on weight body for 100 old-day turtle was 0.909. Carapace length and body height significantly affected body weight for 300 old-day turtle, and the direct effect index was 0.711 and 0.402, respectively. The coefficient of determination of the two attributes on body weight for 100 old-day turtle was 0.785.