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Chinese Journal of Applied Ecology ›› 2019, Vol. 30 ›› Issue (11): 3911-3920.doi: 10.13287/j.1001-9332.201911.039

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Spatial niche and differentiation of major nekton species in Yueqing Bay, Zhejiang, China

ZHANG Lin-lin1, JIANG Ri-jin1,2*, YIN Rui1, XU Kai-da1,2, FANG Fang3, XU Yi-ping3, KE Ai-ying4   

  1. 1Marine and Fisheries Research Institute, Zhejiang Ocean University, Zhoushan 316021, Zhejiang, China;
    2Zhejiang Institute of Marine Fisheries Research, Ministry of Agriculture Key Research Station for Fisheries Resources of Main Fishing Ground, Key Research Station of Sustainable Utilization for Marine Fisheries Resources, Zhoushan 316021, Zhejiang, China;
    3Yueqing Aquatic Research Institute, Wenzhou 325003, Zhejiang, China;
    4Zhejiang Mariculture Research Institute, Wenzhou 325005, Zhejiang, China
  • Received:2019-05-08 Online:2019-11-15 Published:2019-11-15
  • Contact: * E-mail: jiangridge@163.com
  • Supported by:
    This work was supported by the National Key R&D Program of China (2018YFD0900904,2018YFC1406300,2017YFA0604904), the Special Fund for the Key Research and Development Project of Zhejiang Province (2019C02056), and Yueqing Bay Marine Resources Survey.

Abstract: The index of relative importance (IRI), niche breadth, and niche overlap (Qik) of nekton species were calculated using data collected from four fishery resource surveys from May 2016 to February 2017 in Yueqing Bay, Zhejiang Province. The results showed that there were 27 major nekton species (IRI>100) with higher turnover rates across different seasons, while their niche breadth values differed greatly and showed significant positive correlation with IRI. The niche overlaps of nekton were generally low, with the highest overlap value in autumn and the lowest in spring. The total amount of species pairs with niche overlap over 0.6 (Qik>0.6) were 14 in the autumn and five in the spring, which represented 15.4% and 7.6% of the total pairs, respectively. Results from the redundancy analysis suggested that the distribution of main nekton species were mainly affected by temperature, salinity and turbidity, which cause ecological differentiation of nekton species.