基于GIS/RS的东海南部渔场海表温度与中上层鱼类渔获量的关系

Relationship between Pelagic Fishery Resources and Sea Surface Temperature in South Area of East China Sea Base on GIS and RS

根据1998～2005年东海区渔获数据以及同期NOAA/AVHRR资料反演的海表温度数据,分析了我国东海南部中上层渔获量与海表温度和梯度的关系。该区域的渔汛在7～9月,捕捞量约占全年的87.9%。渔区温度集中分布在27.5～30.0℃,温度梯度主要分布在0.5～3.0,1.5～2.0为鱼类最适范围。在该研究海域,反映出渔获量随温度升高而增加,渔获量高值所对应的平均温度较高而温度梯度则相对较低。该区域温度与渔获量比温度梯度与渔获量的相关性略低,可见,温度梯度对东海南部的渔业资源有着更重要的影响。但是,两者的相关性都不明显,这是因为影响鱼类资源的因素除了表温外,还有底层的温度、盐度及饵料生物量等多种环境因子。文中的计算都是在自主开发设计的"海洋渔场渔情分析预报软件系统"中进行。

In this presentation, the catch data of pelagic fishes in East China sea collected from major fishery companies and the SST derived from NOAA imager were used to analyse the relationship between SST and pelagic fishery resources in the south area. The results show that the fishing month of this area is from Jul. to Sep., with SST in 27.5-30.0 ℃ and SST grad in 0.5-3.0. In this area, the fishing production increases with the increasing of SST, and high catch is tightly associated with high SST and low SST grad. The correlation coefficient between SST （or SST grad） and the fishing production is high. All computation in this presentation are worked by ＂Ocean Fishing Ground Analysis and Forecast Soft System ＂