辽宁3个水系鸭绿沙塘鳢个体繁殖力比较研究

doi:10.16378/j.cnki.1003-1111.22046

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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.

Key words： Odontobutis yaluensis individual fecundity Liaohe River system Biliu River system Yalu River system egg diameter

Received: 23 May 2022

S965.199

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	Articles by authors
	LI Wenkang
	LUO Xiaonian
	DUAN Youjian
	LI Jiao
	WU Chen
	JI Chenyue
	DENG Hongsheng

Cite this article:

LI Wenkang,LUO Xiaonian,DUAN Youjian, et al. Comparison of Individual Fecundity of Yalu River Sleeper Odontobutis yaluensis in Three Water Systems of Liaoning Province[J]. Fisheries Science, 2024, 43(1): 22-31.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.22046 OR https://www.shchkx.com/EN/Y2024/V43/I1/22

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