Volume 21 Issue 2
Apr.  2025
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WANG Yuesong, YANG Yang, XU Lin, GAN Xing, HE Dajiang, CHENG Rui, LI Guoliang, BI Jianqi, CHEN Feng, ZHANG Zhiming. Study on artificial propagation and embryonic development regularity of Discogobio multilineatus[J]. South China Fisheries Science, 2025, 21(2): 157-163. DOI: 10.12131/20240222
Citation: WANG Yuesong, YANG Yang, XU Lin, GAN Xing, HE Dajiang, CHENG Rui, LI Guoliang, BI Jianqi, CHEN Feng, ZHANG Zhiming. Study on artificial propagation and embryonic development regularity of Discogobio multilineatus[J]. South China Fisheries Science, 2025, 21(2): 157-163. DOI: 10.12131/20240222
shu

Study on artificial propagation and embryonic development regularity of Discogobio multilineatus

  • 1 .

    Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences/Key Laboratory of Ecological Impacts of Hydraulic Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Wuhan 430079, China

  • 2 .

    Guangxi Datengxia Gorge Water Conservancy Development Co. Ltd., Nanning 530000, China

  • 3 .

    Innovation Team of the Changjiang Water Resources Commission for River and Lake Ecosystem Restoration Key Technology, Wuhan 430079, China

Funds: 1. Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences/Key Laboratory of Ecological Impacts of Hydraulic Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Wuhan 430079, China
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  • Received Date: September 21, 2024
  • Revised Date: November 11, 2024
  • Accepted Date: January 08, 2025
  • Available Online: January 17, 2025
    Graphical Abstract
    • Abstract

  • Discogobio multilineatus is a species endemic to the Hongshui River, with a narrow distribution range and scarce wild resources. In order to achieve the mass production of its larvae and provide technical support for its enhancement and release, the artificially bred D. multilineatus was intensively cultured and artificially induced to spawn. The fertilized eggs were obtained through dry fertilization, and the embryonic development process was observed. The results show that the absolute fecundity of D. multilineatus was (415.53±133.27) grains, and the relative fecundity was (18.70±4.67) grains·g−1. A total of three times of artificial breeding were conducted, with average spawning rate of (93.12±1.73)%, fertilization rate of (67.03±3.62)%, and hatching rate of (61.34±2.13)%. The fertilized eggs of D. multilineatus were demersal, non-adhesive, in light blue or pale yellow color, with an eggshell diameter of (2.11±0.04) mm. After absorbing water and swelling, they turned white, with an egg membrane diameter of (3.37±0.09) mm. At water temperatures of 22−24 ℃, the eggs hatched and eclosed after 67−91 h, with a total hatching and eclosion energy of 1 728.17 ℃·h. The embryonic development went through seven stages and 26 periods, including the blastula stage, cleavage stage, blastocyst stage, gastrula stage, neural plate stage, organogenesis stage, and hatching stage. The newly hatched larvae had a total length of (6.25±0.17) mm and 26 myotomes.

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