6-9月秘鲁外海茎柔鱼资源的空间异质性研究

发布时间：2019-06-17 21:08

【摘要】：根据2003-2012年6-9月(2005年数据缺失)秘鲁外海茎柔鱼渔获数据,利用全局和局部自相关性分析,结合半变异函数模型,探讨秘鲁外海茎柔鱼资源分布的异质性特点,并寻找影响茎柔鱼空间分布的关键环境因子。研究认为:(1)全局自相关统计量Moran’s I和局部自相关统计量Getis-Ord Gi*的Z得分结果显示,秘鲁外海茎柔鱼呈斑块状中等程度的聚集分布,7月份的聚集性强;(2)趋势性分析认为,6-9月茎柔鱼资源在南北方向上基本都呈现出南低北高的变化趋势,而东西方向上均呈现出中间高两端低的分布趋势;(3)6、8月份的最优模型为高斯模型,7月份的最优模型为球状模型,9月份的最优模型为指数模型,6-9月份的块金系数分别为41.33%、24.66%、25.89%和35.42%,其反映了中等程度自相关性,与全局自相关的分析结果一致;(4)相关性检验认为,秘鲁外海茎柔鱼资源局部聚集分布主要是受到海表面高度的影响。对秘鲁外海茎柔鱼资源分布空间异质性的研究,对揭示其栖息地分布及其生态学意义具有一定的作用。
[Abstract]:Based on the catch data of Peruvian offshore stem soft fish from June to September 2003-2012 (missing data in 2005), the heterogeneity characteristics of stem soft fish resources distribution in Peruvian offshore sea were discussed by using global and local autocorrelation analysis and semi-variation function model, and the key environmental factors affecting the spatial distribution of Peruvian offshore soft fish were found. The results showed that: (1) the Z scores of global autocorrelation statistics Moran's I and local autocorrelation statistics Getis-Ord Gi* showed that Peruvian sea stem soft fish showed patchy moderate aggregation distribution, and strong aggregation in July; (2) the trend analysis showed that from June to September, the stem soft fish resources basically showed the trend of low south and north high in the north and south direction, and the distribution trend of middle high and low two ends in the east and west direction. (3) the optimal model in June and August is Gao Si model, the optimal model in July is spherical model, and the optimal model in September is exponential model. The gold block coefficients from June to September are 41.33%, 24.66%, 25.89% and 35.42%, respectively, which reflects the moderate autocorrelation and is consistent with the analysis results of global autocorrelation. (4) the correlation test showed that the local aggregation distribution of stem soft fish resources outside Peru was mainly affected by the sea surface height. The study on the spatial heterogeneity of the distribution of stem soft fish resources off the coast of Peru plays a certain role in revealing the habitat distribution and its ecological significance.
【作者单位】：上海海海洋大学海洋科学学院;国家远洋渔业工程技术研究中心;大洋渔业可持续开发省部共建教育部重点实验室;远洋渔业协同创新中心;
【基金】：国家自然科学基金(NSFC41476129;NSFC41276156) 国家高技术研究发展计划(2012AA092303) 上海市研究生教育创新计划和国家科技支撑计划(2013BAD13B01) 上海市自然科学基金面上项目(13ZR1419300)
【分类号】：S932.4

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