Abstract：Individual fecundity of Yalu River sleeper Odontobutis yaluensis was investigated in 181 samples of female Yalu River sleeper with gonad Ⅳ stage collected in the Xiajia section (124.6° E, 41.3° N)of the Taizi River in Xinbin Manchu Autonomous County of the Liaohe River System, the Wanfu Section (122.5° E, 42.2° N)in the upper reaches of the Biliu River Reservoir of the Biliu River Water System and the Dapu Section (124.2° E, 40.5° N)of the Ai River in Dandong Fengcheng of the Yalu River System from October to December 2018—2020. It was found that the Yalu River sleeper had mean body length of (10.0±2.1) cm and body weight of (23.50±16.79) g, individual absolute fecundity of (1067.7±829.7) eggs, body length relative fecundity of (97.9±56.1) eggs/cm and the body weight relative fecundity of (55.2±18.1) eggs/g. The ages were primarily derived from two-year-old and three-year-old fishes, with reproductive contribution rates of 44.9% and 39.2%, respectively. There were significantly higher individual absolute fecundity (1682.9±718.5) eggs, relative fecundity of body length (147.3±50.6) eggs/cm and relative fecundity (67.7±19.2) eggs/g of body weight of Yalu River sleeper in the Wanfu Section in the upper reaches of the Biliu River Reservoir were than those in the the Xiajia section of the Taizi River [(1058.4±879.9) eggs, (91.8±52.3) eggs/cm, (45.9±12.7) eggs/g] and the Dabao Section of the Ai River[(487.9±215.7) eggs, (58.9±19.9) eggs/cm, (56.1±16.0) eggs/g]. The individual absolute fecundity and relative fecundity of body length of Yalu River sleeper were significantly correlated with the body length, body weight, gutting body weight and ovary weight, while the relative fecundity of body weight was only significantly correlated with gonadosomatic index (P<0.01), and the individual fecundity was not significantly related to condition factor (P>0.05). Multivariate linear stepwise regression analysis showed that the individual fecundity was closely related to ovary weight or gonadosomatic index. The two egg diameter peaks indicated that Yalu River sleeper was the type of batch spawning. The finding provides basic materials for Yalu River sleeper reproductive biology.
李文康, 骆小年, 段友健, 李姣, 吴晨, 季辰跃, 邓鸿圣. 辽宁3个水系鸭绿沙塘鳢个体繁殖力比较研究[J]. 水产科学, 2024, 43(1): 22-31.
LI Wenkang, LUO Xiaonian, DUAN Youjian, LI Jiao, WU Chen, JI Chenyue, DENG Hongsheng. Comparison of Individual Fecundity of Yalu River Sleeper Odontobutis yaluensis in Three Water Systems of Liaoning Province. 水产科学, 2024, 43(1): 22-31.
2024, Vol. 43 
