Breeding Population Composition and Fecundity Characteristics of Burbot Lota lota in the Heilongjiang River Basin
LI Shenhui1,2, SHAO Huili1, ZHANG Zepeng1, LU Wanqiao1, JIN Hongyu1, LI Lei1
1. Heilongjiang River Basin Fishery Resources and Environment Scientific Observation and Experiment Station, Ministry of Agriculture and Rural Affairs, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China; 2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
Abstract：In order to elucidate the composition of breeding population and reproductive characteristics of burbot Lota lota in the Heilongjiang River Basin, the reproductive biological characteristics were investigate in 607 samples of burbot collected in the main streams of the Heilongjiang River including Huma River in the upper reach, Luobei, Tongjiang and Fuyuan River in the middle reaches in October 2022 and January 2023. The results showed that the female∶male ratio of mature stockbrood burbots was approximately 0.6∶1, with female breeders predominantly from 3 to 6 years old classes. It was found that the burbot had absolute fecundity (F) ranging from 16.2 to 1 100.4 thousand eggs, relative fecundities from 30.8 to 1 989.9 eggs/mm for FL, and from 17.3 to 1 265.5 eggs/g for Fm. The relationship between body length and body weight was shown to be described as power function relationship, m＝1×10-5L2.931 3(r2＝0.909 5), and to be logarithmic relationship between absolute fecundity and body weight as F=-212.4ln m+1 853.7, r2= 0.845. The linear regression equation indicated a close relationship between body length and body weight. There was average egg diameter of (0.96±0.09) mm in all samples, with a unimodal distribution. However, significant differences (P<0.01) were observed in mean egg diameters among different river sections, and the absolute fecundity and relative fecundity based on body length were not significantly affected by egg diameter (P>0.05), whereas the relative fecundity based on body weight was significantly influenced by egg diameter (P=0.016<0.05). A model was established linking individual reproductive capacity with relevant major biological measurements via multivariate regression analysis, indicating a positive correlation between reproductive capacity and body weight, while a negative correlation existed with age, body length, dressed rate, condition factor, gonadosomatic index, and ovarian weight.
李慎辉, 邵慧丽, 张泽鹏, 鲁万桥, 金洪宇, 李雷. 黑龙江流域江鳕的繁殖群体组成及繁殖力特性研究[J]. 水产科学, 2025, 44(5): 707-716.
LI Shenhui, SHAO Huili, ZHANG Zepeng, LU Wanqiao, JIN Hongyu, LI Lei. Breeding Population Composition and Fecundity Characteristics of Burbot Lota lota in the Heilongjiang River Basin. Fisheries Science, 2025, 44(5): 707-716.
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2025, Vol. 44 
