El Nino Southern Oscillation and tuna in the western Pacific
El Nino Southern Oscillation and tuna in the western Pacific
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DOI：
10.1038/39575
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发表时间：
1997-10-16
期刊：
影响因子：
64.8
通讯作者：
Picaut, J
中科院分区：
文献类型：
--
作者：
Lehodey, P;Bertignac, M;Picaut, J
全球金枪鱼年产量中近 70%（目前为 320 万吨）来自太平洋。鲣鱼 (Katsuwonus pelamis) 的捕获量占主导地位。尽管鲣鱼分布在整个赤道和副热带太平洋的表层混合层中，但在赤道西太平洋暖池中的捕获量最高，该地区的初级生产力较低，但拥有世界海洋中最温暖的表层水域（图1）。对金枪鱼种群的评估表明，最近西太平洋鲣鱼的年捕捞量接近 100 万吨，是可持续的(2)。暖池是厄尔尼诺南方涛动 (ENSO) 和整个地球气候 (3-5) 的基础，因此也必须提供能够支持这种高产金枪鱼种群的栖息地。在这里，我们表明，鲣鱼种群的明显空间变化与 ENSO 事件期间发生的暖池大面积位移有关 (5,6)。这种关系可用于预测（提前几个月）沿赤道延伸 6,000 多公里的渔场内鲣鱼丰度最高的区域。
Nearly 70% of the world's annual tuna harvest, currently 3.2 million tonnes, comes from the Pacific Ocean. Skipjack tuna (Katsuwonus pelamis) dominate the catch. Although skipjack are distributed in the surface mixed layer throughout the equatorial and subtropical Pacific, catches are highest in the western equatorial Pacific warm pool, a region characterized by low primary productivity rates' that has the warmest surface waters of the world's oceans (Fig. 1). Assessments of tuna stocks indicate that recent western Pacific skipjack catches approaching one million tonnes annually are sustainable(2). The warm pool, which is fundamental to the El Nino Southern Oscillation (ENSO) and the Earth's climate in general(3-5), must therefore also provide a habitat capable of supporting this highly productive tuna population. Here we show that apparent spatial shifts in the skipjack population are linked to large zonal displacements of the warm pool that occur during ENSO events(5,6). This relationship can be used to predict (several months in advance) the region of highest skipjack abundance, within a fishing ground extending over 6,000 km along the Equator.