Volume 17 Issue 3
Jun.  2021
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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
shu

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

  • 1.

    Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China

  • 2.

    Wuxi Fishery College, Nanjing Agriculture University, Wuxi 214081, China

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  • Received Date: December 29, 2020
  • Revised Date: February 08, 2021
  • Accepted Date: March 03, 2021
  • Available Online: March 09, 2021
    Graphical Abstract
    • 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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