长江流域资源与环境 >> 2011, Vol. 20 >> Issue (09): 1035-.

• 自然资源 • 上一篇    下一篇

太湖日本沼虾、秀丽白虾现存量的周年动态研究——以梅梁湾、贡湖湾为例

温周瑞|张大文|谢平|徐军   

  1. (1.湖北省水产科学研究所|湖北 武汉 430071|2.中国科学院水生生物研究所|东湖湖泊生态系统试验站|淡水生态与生物技术国家重点实验室|湖北 武汉 430072
  • 出版日期:2011-09-20

SEASONAL DYNAMICS IN STOCK OF THE FRESHWATER SHRIMPS, Exopalaemon modestus  AND |Macrobrachium nipponense  IN MEILIANG AND GONGHU BAYS, LAKE TAIHU 

WEN Zhourui1,2, ZHANG Dawen2, XIE Ping2| XU Jun2   

  1. (1. Hubei Fishery Science Institute, Wuhan 430071, China|2.Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
  • Online:2011-09-20

摘要:

太湖日本沼虾与秀丽白虾资源较为丰富,在太湖渔业中占有非常重要的地位,但对两种虾类资源动态的研究较少。对梅梁湾和贡湖日本沼虾、秀丽白虾现存量进行了周年调查,结果表明,梅梁湾和贡湖湾日本沼虾丰度和现存量一年内出现波动,冬季较低,春季开始增加,夏季达到高峰,9月后丰度和现存量大幅下降,随后随着个体的生长又有所上升,说明其资源量在短期内受繁殖和捕捞的影响会大幅震荡。不同湖区日本沼虾丰度和现存量存在差异,夏季沿岸带的丰度和现存量明显比敞水区大,主要是6~9月沿岸带分布量增多,说明日本沼虾繁殖季节的亲虾及当年繁殖的幼虾大量栖息于沿岸带,而非敞水区。贡湖秀丽白虾水草区丰度和现存量最高,说明秀丽白虾喜栖息于有沉水植物分布的水域。为合理利用太湖虾类资源提供依据

Abstract:

Resources of 〖WTBX〗Exopalaemon modestus〖WTBZ〗 and 〖WTBX〗Macrobrachium nipponense〖WTBZ〗 are abundant, which occupies a very important position in fishery of Lake Taihu. However, little is known about the resources dynamic of these freshwater shrimps. This article focused on the seasonal dynamics of shrimp stock of 〖WTBX〗E. modestus〖WTBZ〗 and 〖WTBX〗M. nipponense〖WTBZ〗 in Meiliang and Gonghu Bays. The result showed that the densities and biomass fluctuated over time within a year, which began to increase in spring, reached a peak in the summer and sharply decreased after September, indicating the influence of breeding and fishery on resources of these shrimps. Spatially, the density and biomass of 〖WTBX〗M. nipponense〖WTBZ〗 were higher in the littoral zone than in open water with an increase mainly from June to September, indicating the importance of the littoral zone as breeding habitat. In Gonghu Bay, the density and biomass of E. modestus were relatively high in the area covered with submersed vegetation, suggesting this shrimp prefer submersed macrophyte as its habitat. This research helps the rational exploitation of the shrimp resources in Lake Taihu

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