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根据2003-2012年中国拖网渔船在东南太平洋公海的生产统计数据,基于GIS的地统计分析和空间分析方法,研究智利竹■鱼资源密度时空分布的年际变化。结果表明:东南太平洋智利竹■鱼不同年份空间分布趋势变化明显,2003与2004年,资源密度高值区分布在78°~85°W的东北部水域,由东北部向西南部递减;2005、2006及2007年,分布情况与前两年类似,但变化梯度较以前缓和;2008与2009年,资源密度高值区分布散乱,无明显规律;2010年,整体上资源密度呈西高东低的趋势,高值区多分布在93°W以西的水域;2011年,资源密度高值区分布在西北部水域;2012年,资源密度高值区分布在28°~38°S的西北部水域,由西北部向东部递减。热点分析与地统计分析结果一致,它们之间可相互印证。智利竹■鱼资源密度高值点均分布在45°S以北。
According to the production statistics of Chinese trawlers on the high seas of the Southeast Pacific from 2003 to 2012, geostatistical analysis and spatial analysis methods based on GIS, the interannual variability of spatial distribution of bamboo resource density in Chile was studied. The results showed that the spatial distribution trends of P. chinensis varied significantly in different years in the southeast Pacific Ocean. In 2003 and 2004, the high value areas of resources were located in the northeastern watershed of 78 ° -85 ° W, decreasing from northeast to southwest. In 2005 and 2004, In 2006 and 2007, the distribution was similar to that of the previous two years, but the gradient of change was more moderate than before. In 2008 and 2009, the distribution of high-density resource areas was scattered with no obvious rules. In 2010, the overall resource density showed a trend of increasing from west to east , The high value areas are distributed in the waters west of 93 ° W. In 2011, the high value areas of resource density are located in the northwestern waters. In 2012, the high value areas of resources are located in the northwestern waters of 28 ° ~ 38 ° S Northwest to the east decreasing. The hot spot analysis is consistent with the geostatistical analysis results, which can confirm each other. Chilean bamboo ■ The highest point of fish resource density is located north of 45 ° S.