Biodiversity Science ›› 2010, Vol. 18 ›› Issue (4): 420-427.doi: 10.3724/SP.J.1003.2010.420

• Special Issue • Previous Article    

Changes of fish diversity and trophic levels in Quanzhou Bay

Jianguo Du1; Bin Chen1*; Zhenbin Lu2; Puqing Song1; Zhangcheng Xu1; Weiwei Yu1; Xikun Song3   

  1. 1 Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005

    2 Fisheries Research Institute of Fujian, Xiamen 361002

    3 Monitoring Centre of Marine Environment and Fishery Resources of Fujian Province, Fuzhou 350003
  • Received:2010-05-17 Online:2010-07-20
  • Bin Chen

The composition and diversity of fish species in Quanzhou Bay waters are analyzed based on 2 seasonal surveys in 2008. A total of 54 fish species belonging to 32 families, 13 orders and 2 classes are recorded. According to their living environment, the fishes can be grouped into 3 types, among them 12 species are pelagic fish, 19 are near demersal fish and 23 demersal fish. According to temperature adaptation, the fishes can be divided into 2 types, i.e. 40 species are warm water and the rest 14 are temperate warm water fish. In terms of food habit, they can be grouped into 4 types, of which 4 species of omnivores, 37 lower carnivorous, 8 middle carnivorous and 5 higher carnivorous. Argyrosomus argentatus and Johnius belengerii were the first dominant species in May. Then, they were replaced by Coilia mystus and Harpodon nehereus in October. Comparing with a survey in 1985, we find that the species composition and the dominant species of the bay have changed obviously. The Shannon-Wiener index decreased from 3.05 to 2.32, the Pielou evenness decreased from 0.76 to 0.58, the trophic index decreased from 2.79 to 2.54. It is suggested that factors such as overfishing, water pollution and habitat loss may have reduced the fish diversity of the bay.

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