RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (03): 395-403.doi: 10.11870/cjlyzyyhj201603005

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HABITAT CHARACTERS AND FISHERY COMMUNITY IN SALANGICHTHYS TANGKAHKEII NATIONAL AQUATIC GERMPLASM RESERVE IN HUAIHONG NEW RIVER

LIU Kai, DUAN Jin-rong, XU Dong-po, ZHOU Yan-feng, XU Pao   

  1. Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of Yangtze River, Freshwater Fisheries Research Center, CAFS, Wuxi 214081, China
  • Received:2015-06-12 Revised:2015-08-27 Online:2016-03-20
  • Supported by:
    the National Infrastructure of FisheryGermplasm Resources (2015DKA30470)

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Abstract: Using the investigation data in Salangichthys tangkahkeii national aquatic germplasm reserve in Huaihong New River in June and December, 2014, we studied habitat characters and fish community. Most of the indices of water quality in the reserve could achieve water quality standard and TN was the restrictive factors. In the reserve, there were 24 species of aquatic vascular plants, including submerged plants, emergent aquatic plants, floating plants and floating leaved plants, accounted for 41.67%, 33.33%, 16.67% and 41.67%, respectively. In this investigation, thirty-seven species including thirty-three fish species and four shrimp species that belong to 8 orders, 15 families and 35 genus were collected. Because of the semi-closed habitat, the fish community was dominated by freshwater sedentary species and omnivorous species. Ecological dominance of fish community were analyzed through IRI indices, and Macrobrachium nipponensis, Cultrichthys erythropterus as well as Coilianasus were dominated species in summer, and Carassius auratus, Hypophthalmichthys molitrix as well as Hypophthalmichthys nobilis were dominated species in winter. The average weight of catch that collected from various kinds of nets ranged from 0.12 to 114.32 g in summer and ranged from 4.07 to 4.07 g in winter. Adult fish (shrimp) resources densities were 2.018×105 ind./km2 and 1.0441×104 kg/km2, and juvenile fish resources densities were 5.3458×106 ind./km2 and 587.8 kg/km2. The fishery resources density in winter was significantly lower than in summer, and the result showed that resources quantity and weight density in winter only took up 6.94% and 30.93% of those in summer respectively. Indices of biodiversity of fish community based on individuals could be summarized as Margalef's index of 3.8120, Shannon-Wiener's index of 1.4960, Simpson's index of 0.4099 and Pielou's index of 0.1240. Furthermore, Procambaruslarkia was widely distributed in the reserve, more attention showed be paid to its strong invasive ability and the damage to the ecological system.

Key words: Huaihe River, Huaihong New River, national aquatic germplasm reserve, community structure, dominant species, biodiversity characters

CLC Number: 

  • Q958.1
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