Journal of Dalian Ocean University  2023, Vol. 38 Issue (3): 474-481 DOI: 10.16535/j.cnki.dlhyxb.2022-253 |
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| Effects of aquatic plant restoration on fishery resources recovery in Lishan Bay, Lake Taihu |
| CUI Wei，REN Long，XU Dongpo，ZHAO Dongfu，REN Kecheng，XU Pao*
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| 1.Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization，Ministry of Agriculture and Rural Affairs，Freshwater Fisheries Research Center，Chinese Academy of Fishery Sciences，Wuxi 214081，China；2.Graduate School of Chinese Academy of Agricultural Sciences，Beijing 100081，China； 3.National Demonstration Center for Experimental Fisheries Science Education，Shanghai Ocean University，Shanghai 201306，China |
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Abstract Lishan Bay of Lake Taihu is a national fisheries genetic resources conservation area for Chinese mitten crab and orient river prawn. In order to further improve the conservation and environmental restoration effect of fishery resources in the conservation area, the aquatic plant restoration project was implemented in 2015. In this study, fish resource survey was carried out in 2015 (before restoration) and 2021 (after restoration) to explore the restoration effect of fishery resources. The results showed that a total of 42 species of fish were collected in two years, of which 27 and 39 species were collected in 2015 and 2021, respectively. Based on ecological types such as habitat aquifers, reproductive habits and feeding characteristics, this area was dominated by omnivorous fish inhabiting the middle and upper middle layer and spawning on aquatic plants, including Acheilognathus macropterus, Pseudorasbora parva, Acheilognathus chankaensis, and Coilia nasus, etc. There was no significant change in the dominant species before and after the restoration, but the number of dominant species increased after the restoration, such as Saurogobio dabryi, Hemibarbus maculatus, and Xenocypris davidi, etc. The observed results reveal that the structure of fish population tends to be stable, the overall quantity of fish resources in the restoration area exhibits an upward trend with elevated amount of fish resources that prefer to live in aquatic weed area, indicating the restoration of aquatic plant resources has achieved good effects on conservation of fish resources.
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Published: 12 July 2023
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