【摘要】 以东海区按小渔区、日期、网型和网次记录的捕捞数据为样本数据 ,计算出渔业资源密度空间分布的数据 ,结合地理信息系统技术对中上层鱼类资源和底层及近底层鱼类资源的分布作空间展布。结果表明 ,东海区渔业资源密度呈团状和条带状不均匀分布。同时 ,对 1987～ 1997年的资源密度变化趋势进行分析 ,并计算了主要渔场的重心年际变化 ,发现东海渔业资源某些区域的漂移规律明显。更多还原

【Abstract】 According to the capture data on small fishery areas, date, net type and netting times in East China Sea, the spatial distribution of resource density was calculated. Using the technique of geography information system to analyze the distributions of pelagic and demersal fishes, the results revealed that their distribution shows leaf-shaped and band-shaped characters; the whole fishery resource density in East China Sea shows uneven round- or band-shaped distribution, and the amount declined in late 1980s, at the lowest during 1991～1994 until 1995, but no evidence demonstrated if the situation of the whole fishery resource was getting better. Meanwhile, the relationship between resource distribution and hydrologic environment and the varying trend of resource density from 1987 to 1997 was analyzed and the yearly change of main resource base was deduced that certain fishery resources in some areas of East China Sea had obvious drifting regulation due to the variation of hydrology.更多还原