Effects of different temperatures on sex differentiation and critical thermosensitive period of little yellow croaker (Larimichthys polyactis)
文献类型： 外文期刊
作者： Feng, Jing-Ye 1 ; Wang, Ze-Hui 1 ; Wei, Fu-Liang 1 ; Yu, Min 1 ; Ye, Ting 1 ; Wu, Chu-Nan 1 ; Liu, Feng 1 ; Guo, Dan-Dan 1 ; Lou, Bao 1 ; Xie, Qing-Ping 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Hydrobiol, Hangzhou 310021, Peoples R China
2.Ningbo Univ, Sch Marine Sci, Ningbo 315832, Peoples R China
3.Zhejiang Ocean Univ, Coll Marine Sci & Technol, Zhoushan 316021, Peoples R China
关键词： Little yellow croaker ( Larimichthys polyactis ); Temperature-dependent sex determination; Thermosensitive period; Sex differentiation; Masculinization
期刊名称：AQUACULTURE REPORTS （ 影响因子：3.7； 五年影响因子：4.0 ）
ISSN： 2352-5134
年卷期： 2025 年 40 卷
页码：
收录情况： SCI
摘要： This study aimed to determine the thermosensitive period and effect of temperature on sex differentiation in L. polyactis. The results showed that the male-biased sex ratio was 50.9, 57.8, and 97.9 % in the 18, 24, and 31 degrees C groups at 90 days post-fertilization (dpf), respectively. Additionally, eggs, larvae, or juvenile fish were transferred from untreated water to 18 and 31 degrees C every 6 - 9 days from 0 to 55 dpf to clarify the thermosensitive period. The results demonstrated that the critical thermosensitive period was 19 - 25 dpf and the male-biased ratio reached 77.8 %. Exposure to 31 degrees C resulted in 74.1 and 69.6 % male-biased ratios during the 25 - 31 and 31 - 37 dpf periods, respectively, after the critical thermosensitive period. Histological observations indicated that long-term exposure of juvenile fish to 31 degrees C induced oocytes and/or ovary degeneration, followed by sex reversal to the testis. This study demonstrates that the sex differentiation of L. polyactis is significantly affected by high temperatures during the thermosensitive period and provides basic information on the sex differentiation of L. polyactis. It also provides a theoretical foundation for the sex-controlled breeding of L. polyactis.
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