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首页> 外文期刊>ICES Journal of Marine Science >Spatial and temporal variability of the Pacific saury (Cololabis saira) distribution in the northwestern Pacific Ocean
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Spatial and temporal variability of the Pacific saury (Cololabis saira) distribution in the northwestern Pacific Ocean

机译：西北太平洋太平洋秋刀鱼（Cololabis saira）分布的时空变化

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摘要

Logbook data for the Taiwanese Pacific saury fishery and multi-sensor satellite images for 2006-2010 were used to characterize the habitat of Pacific saury (Cololabis saira) in the northwestern Pacific (NWP). An empirical cumulative distribution function (ECDF) approach identified that high cpue (catch per unit of effort) of Pacific saury occurred when sea surface temperature (SST) ranged from 14 to 16℃, chlorophyll-α concentration (Chi α) ranged from 0.4 to 0.6 mg m~(-3), and net primary production (NPP) ranged from 600 to 800 mg C m~(-2) d~(-1). A generalized additive model (GAM) and spatial non-stationary geographically weighted regression (GWR) were applied to predict the habitats of Pacific saury in the NWP. The spatial distributions of Pacific saury in the NWP estimated using the two approaches were similar and matched the nominal cpue distributions and those inferred from preferred habitat ranges based on ECDF. The density of Pacific saury is higher in coastal waters close to the island of Hokkaido and near the southern Kuril Islands than in the open sea. SST, Chi α, and NPP were substantially higher in the fishing grounds for Pacific saury during the main fishing season (September and October), corresponding to a high cpue for Pacific saury (23.1 t fishing day~(-1)). The GAM explained more variability in spatial distribution (35.7%) than GWR (20.5%) VGPM (Vertically Generalized Production Model). Results derived from this study could improve our understanding of Pacific saury habitat distributions, which could be used to forecast fishing grounds and to develop fishery management advice based on oceanographic conditions that might be impacted by climate change.
机译：台湾太平洋秋刀鱼渔业的记录数据和多传感器卫星图像（2006-2010年）用于表征西北太平洋（NWP）的太平洋秋刀鱼（Cololabis saira）的栖息地。经验累积分布函数（ECDF）方法确定，当海表温度（SST）为14至16℃，叶绿素-α浓度（Chiα）为0.4至16℃时，发生了较高的cpue（每单位工作量的捕获量）。 Cm〜（-2）d〜（-1）为0.6 mg m〜（-3），净初级生产力（NPP）为600〜800 mg C m〜（-2）d〜（-1）。应用广义加性模型（GAM）和空间非平稳地理加权回归（GWR）来预测NWP中太平洋秋刀鱼的栖息地。使用这两种方法估算的NWP中太平洋秋刀鱼的空间分布是相似的，并且与名义cpue分布以及根据ECDF从首选栖息地范围推断出的分布相吻合。在北海道岛附近和千岛群岛南部附近的沿海水域中，秋刀鱼的密度高于公海。在主要捕捞季节（9月和10月），太平洋秋刀鱼的渔场中SST，Chiα和NPP显着较高，这对应于太平洋秋刀鱼的高产量（23.1吨捕捞日〜（-1））。 GAM解释了比GWR（20.5％）VGPM（垂直通用生产模型）更大的空间分布差异（35.7％）。这项研究得出的结果可能会增进我们对太平洋秋刀鱼栖息地分布的理解，可用于预测渔场并根据可能受气候变化影响的海洋学条件制定渔业管理建议。

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