摘要
以东海区分小渔区分天分网型的捕捞量统计数据为样本数据 ,计算出资源密度的时空分布数据 ,并结合地理信息系统技术对这一时空数据进行时空分析。对东海区的中上层鱼类资源和底层及近底层鱼类资源的空间展布作分析 ,可以看到资源分布的块状和带状特征 ,以及资源分布与水文环境的关系。最后 ,对每个渔区 1 1年的资源密度进行趋势分析发现 ,1 1年来大部分渔区的资源密度呈下降趋势 ,小部分渔区的资源密度呈上升趋势。
Catch data from the East China Sea from 1987 through 1997, and other environmental factors, were overlain using Geographic Information System (GIS) technology. Maps of the spatio temporal density of the demersal and pelagic fishery resources were produced. After analyzing density distribution, the relationship between spatio temporal distributions and environmental factors is analyzed. The demersal fishery resource is mainly distributed between the 200m isobath and the central route of Kuroshio Current. Trend analyses show that the fishery resources generally decreas in the study area during the 11 year period.
出处
《高技术通讯》
CAS
CSCD
2001年第5期60-63,59,共5页
Chinese High Technology Letters
基金
863计划资助项目 ( 863 818 0 7 0 2 )
