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首页> 外文期刊>ICES Journal of Marine Science >Changes in life-history traits in relation to climate change: bluefish (Pomatomus saltatrix) in the northwestern Mediterranean
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Changes in life-history traits in relation to climate change: bluefish (Pomatomus saltatrix) in the northwestern Mediterranean

机译：与气候变化有关的生活史特征的变化：地中海西北部的蓝鱼（Pomatomus saltatrix）

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摘要

This study shows the strong relationship between the increasing surface temperature in the NW Mediterranean and the expansion northwards of the bluefish distribution range with the species reproducing in the new distribution areas. Two shifts in temperature were detected: the first one in the early 1980s and the second around 1997. This last shift, explained by warmer springs (April-June), when the species migrates for spawning, led to the observed changes in bluefish. In the western Mediterranean basin, a significant increase in bluefish landings was observed by the mid nineties, whereas in the Catalan coast, the northern edge of the species distribution, a northward expansion was observed from 2000. At present, spawning takes place all along the Catalan coast (June to September), including the new distribution areas, being 21 C the threshold for the presence of larvae in the plankton. This temperature was not attained in June two decades ago. The highest concentrations of larvae were located near the mouth of the Ebro River and their distribution to the north did not extend beyond the thermal front. Bluefish has taken the advantage of the changing environmental conditions and is established in new northernmost distribution areas.
机译：这项研究表明，西北地中海地区的地表温度升高与蓝鱼分布范围向北扩展与新分布区域繁殖的物种之间存在密切关系。检测到温度发生了两个变化：第一个变化发生在1980年代初，第二个变化发生在1997年左右。最后一个变化是由春季变暖（4月至6月）所解释的，当时该物种迁移成卵，导致观察到的蓝鱼变化。在地中海西部盆地，到90年代中期，蓝鱼的上岸量显着增加，而在加泰罗尼亚海岸，物种分布的北部边缘，从2000年开始向北扩张。目前，产卵一直沿加泰罗尼亚海岸（6月至9月），包括新的分布区，是浮游生物中幼虫存在的阈值21C。两十年前的六月没有达到这个温度。幼虫的最高浓度位于埃布罗河口附近，它们向北的分布没有超出热锋。蓝鱼已经利用了不断变化的环境条件，并在最北端的新分布地区建立了蓝鱼。

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