吴新燕, 梁宏伟, 罗相忠, 沙航, 邹桂伟. 不同月龄长丰鲢形态性状对体质量的影响[J]. 南方水产科学, 2021, 17(3): 62-69. DOI: 10.12131/20200265
引用本文: 吴新燕, 梁宏伟, 罗相忠, 沙航, 邹桂伟. 不同月龄长丰鲢形态性状对体质量的影响[J]. 南方水产科学, 2021, 17(3): 62-69. DOI: 10.12131/20200265
WU Xinyan, LIANG Hongwei, LUO Xiangzhong, SHA Hang, ZOU Guiwei. Effects of morphological traits on body mass of Changfeng silver carp (Hypophthalmichthys molitrix) at different ages[J]. South China Fisheries Science, 2021, 17(3): 62-69. DOI: 10.12131/20200265
Citation: WU Xinyan, LIANG Hongwei, LUO Xiangzhong, SHA Hang, ZOU Guiwei. Effects of morphological traits on body mass of Changfeng silver carp (Hypophthalmichthys molitrix) at different ages[J]. South China Fisheries Science, 2021, 17(3): 62-69. DOI: 10.12131/20200265

不同月龄长丰鲢形态性状对体质量的影响

Effects of morphological traits on body mass of Changfeng silver carp (Hypophthalmichthys molitrix) at different ages

  • 摘要: 为研究长丰鲢 (Hypophthalmichthys molitrix) 形态特征对生长发育的影响,文章采用主成分分析和通径分析对其常规形态和框架结构进行了研究。结果表明,不同月龄长丰鲢各形态性状与体质量均呈极显著正相关 (P<0.01);不同阶段体质量与形态性状的相关性有所不同。主成分分析结果显示6和12月龄表现为鱼体整体结构的协同生长发育,而36月龄主要是躯干部的增长。通径分析结果显示3个月龄中鳃盖背侧后缘至鳃盖腹侧后缘 (x8)、全长 (x11) 和体高 (x13) 与体质量的通径系数均达到显著水平 (P<0.05),这3个性状在各阶段均对体质量有显著影响;同时建立了3个月龄组不同形态性状对体质量的最优回归方程。不同阶段各形态性状对体质量的影响有所不同,建议早期生长阶段将全长、体长和体高作为长丰鲢的主要选育目标,而成鱼阶段除了考虑全长,还需要重视鱼体宽度对体质量的影响。

     

    Abstract: To study the influence of morphological characteristics of Changfeng silver carp (Hypophthalmichthys molitrix) on its growth, we applied the principal component analysis and path analysis methods to analyze the conventional morphological measurements and truss network. The results show that the correlation coefficients between the morphological traits and body mass were extremely significant at different ages (P<0.01). Besides, the correlation coefficients between them were also different at different stages. Principal component analysis revealed that 6- and 12-month old H. molitrix showed a synergistic growth, as well as development of the overall structure, but it was mainly the growth of the trunk at 36-month age. Path analysis shows that the path coefficients of three morphological traits (x8, x11, x13) for the body mass were significant at three stages (P<0.05), and these traits had significant impacts on the body mass at all stages. The optimal regression equations of morphological traits to body mass were established for the three groups. The effects of morphological traits on the body mass were distinct at different stages. The results suggest that the total length, body length and body height should be selected as the breeding targets for H. molitrix at early growth stage. However, the target trait for selective breeding of adult fish should mainly be total length, and the synergistic breeding of fish body width should be emphasized.

     

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