LIU Mingdian
Scientific Observing and Experimental Station of Fishery Resources and Environment in the Upper and Middle Reaches of the Yangtze River, Ministry of Agriculture;Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, ChinaGAO Lei
Scientific Observing and Experimental Station of Fishery Resources and Environment in the Upper and Middle Reaches of the Yangtze River, Ministry of Agriculture;Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, ChinaTIAN Huiwu
Scientific Observing and Experimental Station of Fishery Resources and Environment in the Upper and Middle Reaches of the Yangtze River, Ministry of Agriculture;Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, ChinaZHU Fengyue
Scientific Observing and Experimental Station of Fishery Resources and Environment in the Upper and Middle Reaches of the Yangtze River, Ministry of Agriculture;Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, ChinaWang Dengqiang
Scientific Observing and Experimental Station of Fishery Resources and Environment in the Upper and Middle Reaches of the Yangtze River, Ministry of Agriculture;Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, ChinaCHEN Daqing
Scientific Observing and Experimental Station of Fishery Resources and Environment in the Upper and Middle Reaches of the Yangtze River, Ministry of Agriculture;Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, ChinaLIU Shaoping
Scientific Observing and Experimental Station of Fishery Resources and Environment in the Upper and Middle Reaches of the Yangtze River, Ministry of Agriculture;Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, ChinaDUAN Xinbin
Scientific Observing and Experimental Station of Fishery Resources and Environment in the Upper and Middle Reaches of the Yangtze River, Ministry of Agriculture;Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, ChinaScientific Observing and Experimental Station of Fishery Resources and Environment in the Upper and Middle Reaches of the Yangtze River, Ministry of Agriculture;Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
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Surveys were conducted in the Yichang section in the middle reaches of the Yangtze River from May to June in 2014 and 2015 to reveal the current status of the spawning grounds of fishes with pelagic eggs. A total of 12209 eggs was collected in the Yichang section and the eggs were identified by molecular biological methods. The eggs belonged to 27 species in 4 families in 2 orders. Among them, most were Cyprinidae (77%), followed by Cobitidae, accounting for 15%, and Homalopteridae and Salangidae had the least frequent, each at 4%. Of the 27 identified species, 22 were middle drifting fish eggs or 81% of all species. The total of pelagic eggs in the middle reaches of the Yangtze River was estimated to be 79.1×108 individuals and 70.9×108 individuals, and that of the four major Chinese carp species was 5.65×108 individuals and 6.13×108 individuals during 2014 and 2015, respectively. During the surveys, fishes had a total of seven spawning peaks. Spawning peaks occurred in late May and early June. A series of strong tendencies were found for the four major Chinese carp species regarding the amount of daily fish spawning and the daily flow rate. In 2014, the spawning grounds of the four major Chinese carp species was located in the Gezhouba, Yichang, and Baiyang reaches. The four major Chinese carp species were located in the Gezhouba and Yichang reaches in 2015. Compared with historical data, the range of the spawning grounds of the four major Chinese carp species moved downstream and the number of eggs displayed a decreasing tendency in recent years in the Yichang section in the middle reaches of the Yangtze River, where they have gradually decreased. It is suggested that scientific and suitable ecological reservoir reoperation and enhancement is needed, and fish release should be conducted to meet the demand of fish breeding in the middle reaches of the Yangtze River.
刘明典,高雷,田辉伍,朱峰跃,汪登强,陈大庆,刘绍平,段辛斌. 长江中游宜昌江段鱼类早期资源现状[J]. Jounal of Fishery Sciences of China, 2018,[volume_no](1):147-158
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