RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (07): 1086-1092.doi: 10.11870/cjlyzyyhj201607010

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FISH RESOURCES AND FEEDING HABITS OF PTYCHOBARBUS KAZNAKOVI IN THE ZENGQU RIVER, A TRIBUTARY OF THE UPPER JINSHA RIVER

ZHU Ting-bing1, LI Fei1,2, YANG De-guo1   

  1. 1. Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Wuhan 430223, China;
    2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
  • Received:2015-10-15 Revised:2015-12-30 Online:2016-07-20
  • Supported by:
    Modern Agriculture Talents Support Program(2130106)

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Abstract: Studies on the status of fish resources and feeding habits of Ptychobarbus kaznakovi of the Zengqu River, in the upper Jinsha River, were conducted in May and September, 2013. A total of 10 fish species belonging to 2 orders and 3 families and 5 genera were found in the Zengqu River. The Cyprinidae included 7 species accounting for 70% of species; Sisoridae included two species accounting for 20% of species; Cobitidae included one species accounting for 10% of species. The diet of P. kaznakovi consisted of 53 genera or species, which included phytoplankton, protozoa, arthropod, etc. Bacillariophyta had the highest occurrence rate percentage, index of relative importance and quantity percentage among the all prey species. Aquatic insects had the highest mass percent among the all prey species. There was an obvious seasonal difference in feeding intensity of P. kaznakovi, which had relative lower feeding intensity in the end of the rainy season. Index of relative importance of plant in the diet increased with the growth of body length of P. kaznakovi. The present study indicates that the fish composition of the Zengqu River was simple, and Cyprinidae fishes were the dominant fish species. P. kaznakovi is omnivorous fish with seasonal variation. It is suggested that ecological compensation measures such as fish inhabitant conservation or reconstruction should be done during the hydropower cascade development to protect the fish in the Zengqu River.

Key words: the Zengqu River, fish resources, Ptychobarbus kaznakovi, feeding habits

CLC Number: 

  • S932
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