北太平洋公海日本鲭资源分布及其渔场环境特征

发布时间：2018-01-02 11:36

  本文关键词：北太平洋公海日本鲭资源分布及其渔场环境特征　出处：《海洋渔业》2017年04期 　论文类型：期刊论文

  更多相关文章： 鲐鱼 海洋环境 GAM模型 北太平洋

【摘要】：根据2014~2015年两年收集的北太平洋公海围拖网作业的日本鲭(Scomber japonicas,又称鲐鱼)生产月度数据,结合同期卫星遥感反演技术获取的海表温度(SST)、海水叶绿素a(Chl-a)浓度、海流等环境数据,运用渔获量重心法,地统计插值等方法,分析了北太平洋公海鲐鱼的资源分布情况与渔获量重心的时空变化及其与主要环境因子之间的关系。研究表明,鲐鱼渔场季节性差异明显,渔场重心集中分布在39°N~43°N、147°E~154°E范围内。两年渔场重心均呈现先向东北方向移动,自9月开始再向西南方向移动的趋势。GAM模型显示,北太平洋鲐鱼渔场的最适海表温度范围是16~18℃,最适叶绿素a浓度范围是0.3~0.8 mg·m~(-3),空间上集中分布在40°N~41°N、148°E~151°E,海流对鲐鱼渔场形成尤为重要。
[Abstract]:Monthly data on the production of Scomber japonicas (Scomber japonicas) in high seas trawling operations in the North Pacific Ocean were collected from 2014 to 2015. The environmental data such as sea surface temperature (SST), sea water chlorophyll a Chl-a (Chl-a), current and so on were obtained by using satellite remote sensing inversion technique in the same period. The methods of catch center of gravity and geostatistical interpolation were used. The relationship between the distribution of mackerel resources in the high seas of the North Pacific Ocean and the center of catch of mackerel and its relationship with the main environmental factors was analyzed. The center of gravity of the fishing ground is concentrated in the range of 39 掳Nao 43 掳N, 147 掳E, 154 掳E. the gravity center of the fishing ground moves first to the northeast for two years. The GAM model shows that the optimum sea surface temperature range of mackerel fishing ground in the North Pacific is 16 ~ 18 鈩，

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