Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (30): 139-146.doi: 10.11924/j.issn.1000-6850.casb2020-0554

Special Issue: 水产渔业

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The Fish Community Structure and Its Relationship with Environmental Factors in Zhenjiang Hechang Section of the Yangtze River

Wang Zhaogen1(), Cao Guo2, Pan Jie1, Tian Jiali3, Wang Yuan3, Liu Kai3()   

  1. 1Zhenjiang Administrative Office of Yangtze Dolphin Provincial Nature Reserve, Zhenjiang Jiangsu 212000
    2Collage of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306
    3Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi Jiangsu 214081
  • Received:2020-10-15 Revised:2021-02-08 Online:2021-10-25 Published:2021-12-08
  • Contact: Liu Kai E-mail:scwzg163@163.com;liukai@ffrc.cn

Abstract:

To study the fish community structure and their correlation with environmental factors in Zhenjiang Hechang section of the Yangtze River, the fishery-annual survey was conducted in November of 2016 to October of 2017. The Redundancy analysis (RDA) was used to study the correlation between fish community and environmental factors in this section. A total of 79 species were collected, which belongs to 57 genera, 17 families and 9 orders. The Cypriniformes had the maximum ratio. The results show that orthophosphate, water temperature and water depth have significant influence on the composition of fish community (P<0.05). Ctenopharyngodon idellus and Carassius auratus have the biggest correlation with the concentration of orthophosphate, Elopichthys bambusa and Hemiculter bleekeri have the biggest correlation with the water depth, Culter alburnus and Mylopharyngodon piceus have the biggest correlation with the water temperature. The tide is also a key factor affecting the composition of fish community, which is generally manifested as a large number of fish species and quantity in the spring tide period, but the difference is not significant. The research could supplement the basic data of fish and provide a scientific basis for the assessment and protection of fishery resources in the Yangtze River basin.

Key words: Zhenjiang section of the Yangtze River, Hechang islet, fish community structure, water environmental factor, tidal process

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