1.Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; 2. Graduate School, Chinese Academy of Agricultural Sciences, Beijing 100081, China; 3.Changshu Kunchenghu City Service Company Limited, Changshu 215500, China
Abstract: In order to understand the present situation of fish community composition and the age characteristics of main economic fish in Kuncheng Lake, the fish community structure and age characteristics of main economic fish were seasonally surveyed by gill nets and traps in 5 representative sites in Kuncheng Lake (31°33′44″-31°37′01″N, 120°43′14″-120°45′57″E) in Jiangsu Province from August 2020 to July 2021.The results showed that there were 37 fish species, belonging to 5 orders, 8 families and 30 genera, with dominant species in Cyprinidae (28 species), accounting for 75.68% of the total species, including tapertail anchovy Coilianasus, culter Cultermongolicus, thin sharpbelly Toxabramisswinhonis, pseudobream Pseudobramasimoni, bighead carp Aristichthysnobilis, silver carp Hypophthalmichthysmolitrix, spotted steed Hemibarbusmaculatus, Paracanthobramaguichenoti, Acheilognathusmacropterus, crucian carp Carassiusauratus. The maximal indices of Shannon-Wiener diversity, Margalef richness and Pielou evenness were observed in summer, without significant difference between seasons (P>0.05). The silver carp and bighead carp had dominant ages from 5 to 6 years old, and silver carp had average weight of 1 567.99 g and bighead carp 1 549.59 g. The CLUSTER and NMDS showed that the fish community was mainly influenced by seasons, with little spatial difference. The findings indicated that the complex and diverse habitat characteristics in Kuncheng Lake provide favorable conditions for its high fish diversity, and that silver carp and bighead carp had small size was primarily attributed to the high stocking density.
陈亚东, 周雪明, 任泷, 凡迎春, 徐东坡, 徐跑. 昆承湖鱼类群落结构及经济鱼类年龄特征[J]. 大连海洋大学学报, 2022, 37(6): 1013-1021.
CHEN Yadong, ZHOU Xueming, REN Long, FAN Yingchun, XU Dongpo, XU Pao. Fish community structure and age characteristics of economic fish in Kuncheng Lake. Journal of Dalian Ocean University, 2022, 37(6): 1013-1021.