Abstract
Ichthyofaunal diversity of the Dianshan lake in Shanghai, China was assessed during the year 2013 from samples of finfish harvested using fleets of gillnets and trawls of different mesh sizes with the aim of generating necessary data that could support sustainable use of finfish in this lake. Morphometric parameters of specimens caught were taken following standard procedures. Totally 21,308 specimens belonging to 40 species, 15 families and 7 orders were encountered throughout the study period. Seasonal abundance was lowest (395 individuals) during March (spring) and highest (4428 individuals) during August (summer). Cyprinidae was the dominant family (22 species) and Coilia ecetenes taihuensis was the most abundant species (30.69%), followed by Acheilognathus taenianalis (17.8618%), Plagiognathops microlepis (16.567%), Carassius auratus (14.492%). The evenness, richness and biodiversity of the faunal assemblage were also evaluated by Shannon–Wiener index (H′), Margalef’s diversity Index (d) and evenness index (J) respectively. Hypophthalmichthys nobilis was the largest and heaviest fish (34.909 cm, FL; 889.355 g, W), the smallest fish in length recorded was Odontamblyopus rubicundus (4.19 cm) while Plecoglossus altivelis altivelis (1.1 g) was the lowest in terms of mean weight. The mean condition factor for all fish species was (K = 1.72), showing fish species were generally in ‘good’ condition. Fluctuations in species occurrence and abundance noted in our study may be accounted from the variation in the physico-chemical parameters of the Lake in respect to time. But, under such a situation it is evident that the small fish species increased to a great extent and a few like Coilia ecetenes taihuensis became the dominant.
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Acknowledgements
We are thankful to Shanghai Municipal Council’s Agricultural committee and Shanghai Ocean University for funding and support of this study. We thank the two anonymous reviewers and the editor, Dr. B. R. Maiti, for their constructive comments for the improvement of this manuscript.
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Kindong, R., Dai, XJ., Tian, SQ. et al. Ichthyofaunal Assemblage of the Dianshan Lake, Shanghai, China: Implications for Management. Proc Zool Soc 71, 153–163 (2018). https://doi.org/10.1007/s12595-017-0220-4
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DOI: https://doi.org/10.1007/s12595-017-0220-4