| 摘要: |
| 东海北部是鲐鲹鱼主要渔场之一, 研究其水文及其变化特征对于掌握鲐鲹鱼中心渔场的时空变化规律、指导渔业生产、合理利用海洋渔业资源具有重要意义。根据1987—2001年在29°—32°N、124.5°E以西海域的海洋环境调查资料和鲐鱼渔场资料, 在GIS平台上, 用最优隶属模型划分水团, 并研究渔场的水团和温、盐跃层特性及其月、年变化之间的相关性, 用于渔情预报。研究表明, 用最优隶属模糊聚类方法划分该海域水团的结果与以往的研究结
果比较一致；鲐鲹鱼渔情与该区域水团第一强度、第二强度之间显示了一定的相关性；用稳健统计学方法,；可确定中心渔场的底层、鱼类栖息水层的温盐范围及其聚类中心值；鲐鲹鱼渔情、渔场与水文跃层的关系密切。
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| 关键词: 东海北部,鲐鲹鱼渔场,水文特征,统计学 |
| DOI：10.11693/hyhz200304006006 |
| 分类号: |
| 基金项目:国家863计划资助项目,2001AA623020号;国家教育部科学技术研究重点项目,02060号 |
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| STATISTICAL RESEARCH ABOUT HYDROLOGIC CHARACTER OF FISHING GROUND OF PNEUMATOPHORUS JAPONICUS AND DECAPTERUS MARUADSI IN THE NORTH OF EAST CHINA SEA |
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MIAO Zhen-Qing, YAN Shi-Qiang
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Zhejiang Ocean University
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| Abstract: |
| The region in the north of East China Sea is one of main fishing ground of Pneumatophorus japonicus and Decapterus maruadsi. Its geographical position is particular and the hydrological character of fishing ground is phantasmagoric. The relation between the spatio-temporal variety of central fishing ground and the distribution of water mass in this region is very consanguineous. So it is of momentous significance to analyze the station of this region, to hold the rule of the spatio-temporal variety of the central fishing ground,then to direct the fishery practice and to utilize rationally marine fishery resources. Base on the data of marine environmental investigation to the west of 29°—32°N, 124.5°E from 1987 to 2001 and the information about the fishing ground of Pneumatophorus japonicus and Decapterus maruadsi, in the platform of GIS (Geography Information System), and with a new optimum fuzzy clustering method, the study was conducted on analyzing the distribution of water mass and its character of temperature, salinity, then the character of thermocline and halocline in this region and the relation among them as the year and month changed. The result indicate that the distribution of water mass in this region compartmentalized by the new optimum fuzzy clustering method is identical with that by other methods, and this method can reduce the subjectivity of defining grade of membership factitiously and overcame some short comings of traditional clustering methods, and can be used to compartmentalize water mass along shore which included Coastal Water Mass ,Donghai Warm Water Mass and Mixing Water Mass,etc. in the surface layer and
Coastal Water Mass, Kuroshio Subsurface Water Mass and Mixing Water Mass,etc. in the bottom layer, that the change between the location of central fishing ground and the water mass′s volume and character of this region is consanguineous correlative, that definite relativity exists between the character of temperature and salinity of water mass and the production of Pneumatophorus japonicus and Decapterus maruadsi indicate, that, using moderate statistic method, the range is from 19.0℃ to 21.0℃of temperature and ranges from 33.0 to 34.5 of salinity in the bottom of the central fishing ground and the water layer in which the fish inhabit, then the eigenvalue were also determined, that the central fishing ground of Pneumatophorus japonicus and Decapterus maruadsi always tend to the top or underside of hydrological-cline and the character of hydrological-cline also affect the production by different means, but in the practices, it also is affected by the other marine environmental factors and social, economic factors, that the appliance of GIS make it easier and more intuitive to input or output data, and is also in favor of share of data.
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| Key words: North of East China Sea, Fishing ground of Pneumatophorus japonicus and Decapterus maruadsi, Hydrologic character, Statistics |
