室内工厂化养殖与室外池塘养殖尖吻鲈形态性状与体重的相关性研究

Correlation Analysis of Morphological At-tributes Effects on Body Weight of Lates cal-carifer Cultured in Indoor and Outdoor Rearing System

摘要: 为探明室内工厂化养殖和室外池塘养殖尖吻鲈(Lates calcarifer)形态性状与体重的关系及形态差异，在海南省陵水县室内工厂化车间及室外池塘对同一批次8月龄尖吻鲈的体重体重(y)、头长(x1)、躯干长(x2)、体长(x3)、全长(x4)、体高(x5)、体宽(x6)、眼间距(x7)、眼径(x8）、吻长(x9)、尾柄高(x10)、尾柄长(x11)等11个形态性状进行了测量，并进行了相关分析、通径分析和回归分析。结果显示，室内工厂化养殖尖吻鲈体重平均值为291.19 g，室外池塘养殖尖吻鲈体重平均值为432.64 g。2个养殖组尖吻鲈除了头长无显著差异外，在体重、躯干长、体长、全长、体高、体宽、眼间距、眼径、尾柄高和尾柄长等方面呈极显著差异(P < 0.01)。两个养殖组尖吻鲈各性状与体重均呈正相关，且相关系数均达到极显著水平(P < 0.01)。通径分析结果表明，室内工厂化养殖组的全长、体高、体宽和眼间距对体重的通径系数达到极显著水平(P < 0.01)，而全长、体高、体宽和眼径等4个形态性状对室外池塘养殖组体重的通径系数也达到极显著水平(P < 0.01)。决定系数分析显示，室内工厂化养殖组的全长、体高、体宽和眼间距对体重的共同决定系数之和为0.956，室外池塘养殖组的全长、体高、体宽、和眼径对体重的共同决定系数之和为0.844，说明2个尖吻鲈养殖组的体重分别主要由这些形态性状决定；通过逐步回归分析，建立了2个养殖组尖吻鲈多元回归方程：y室内工厂化养殖 = −590.25 + 1.21x4 + 3.20x5 + 5.43x6 + 4.93x7，y室外池塘养殖 = −713.19 + 1.95x4 + 5.63x5 + 4.53x6 − 13.18 x8。

Abstract: The relationship between morphological attributes on body weight and morphological differentia-tion of Lates calcarifer was explored, 11 morphological attributes including head length (x1), stem length (x2), body length (x3), total length (x4), body height (x5), body width (x6), eye distance (x7), eye diameter (x8), snout length (x9), the caudal peduncle height (x10), the caudal peduncle length (x11) and y the body weight (y) was measured from Hainan Lingshui indoor industrial culture and outdoor pond culture population of eight month old L. calcarifer by correlation analysis, path anal-ysis and regression analysis. The results showed that the average body weight of L. calcarifer of in-door industrial culture was 291.19 g while the population of outdoor pond culture was 432.64 g. The results also showed that there were extremely significant differences except head length be-tween these two population (P < 0.01). There was a positive correlation among the morphological attributes and body weight of these two groups, and the correlation coefficients reached an ex-tremely significant level (P < 0.01). The path analysis revealed that the direct effects of total length, body height, body width and eye distance on body weight were extremely significant (P < 0.01) in indoor industrial culture population, while the direct effects of total length, body height, body width and eye diameter on body weight were highly significant (P < 0.01) in outdoor pond culture population. The analysis results of determination coefficients showed that the total decision coeffi-cient of morphological attributes to body weight is found to be 0.956 and 0.844 respectively, and indicating the morphological attributes are the main factors to body weight. The multiple regres-sion equation was expressed as yindustrial culture group = −590.25 + 1.21x4 + 3.20x5 + 5.43x6 + 4.93x7, ypond culture group = −713.19 + 1.95x4 + 5.63x5 + 4.53x6 − 13.18x8 were established by stepwise regres-sion analysis respectively.