Journal of Zhejiang Agricultural Sciences ›› 2025, Vol. 66 ›› Issue (5): 1271-1276.DOI: 10.16178/j.issn.0528-9017.20241002

Previous Articles     Next Articles

Effect of temperature on embryonic development of Opsariichthys bidens

WENG Xudong1(), WENG Jinpeng1, JIAN Jieliang2, ZENG Ni3, FU Yao3, XU Lin1, LYU Meidi1,*()   

  1. 1. Zhejiang Yulaoda Agricultural Science and Technology Company, Quzhou 324000, Zhejiang
    2. Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang
    3. Longyou County Breeding Development Center, Quzhou 324000, Zhejiang
  • Received:2024-12-31 Online:2025-05-11 Published:2025-05-20

Abstract:

In order to understand the effects of temperature on the embryonic development of Opsariichthys bidens, fertilized eggs were obtained by artificial insemination. The embryonic development at 20, 22, 24 and 26℃ were observed by microscope, and the morphological changes were recorded by photographing. It was found that the embryonic development process of Opsariichthys. bidens was divided into 7 stages (uplift of blastoderm stage, cleavage stage, blastula stage, gastrula stage, neurula stage, organogenesis stage, hatching stage) and 28 small periods. Under the conditions of 20, 22, 24 and 26 ℃, the total embryonic development time was 62.33, 59.19, 53.28 and 49.53 h, respectively, and the hatching rate was 65.06%, 76.11%, 78.78% and 77.54%, respectively. The biological zero of embryonic development was 11.02 ℃, and the average effective accumulative temperature degree was 660.80 ℃·h. The abnormality rates of hatchlings were 24.44%, 5.05%, 0 and 0 at 20 ℃, 22 ℃, 24 ℃ and 26 ℃, respectively. The optimum temperature for embryonic development of Opsariichthys. bidens was 24℃. This study provided reference for the optimization of Opsariichthys. bidens breeding techniques.

Key words: Opsariichthys bidens, temperature, embryonic development

CLC Number: