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首页> 外文期刊>ICES Journal of Marine Science >Impacts of a shift to a warm-water regime in the Gulf of California on jumbo squid (Dosidicus gigas)
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Impacts of a shift to a warm-water regime in the Gulf of California on jumbo squid (Dosidicus gigas)

机译：加利福尼亚湾转向温水制度对巨型鱿鱼的影响（Dosidicus gigas）

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Interannual oceanic oscillations, climate change, and extreme events present a significant and complex challenge to management of pelagic fisheries. In recent years, anomalous oceanographic and atmospheric conditions have been reported across the northeast Pacific, yet research results concerning the biophysical mechanisms impacting specific organisms, populations, and fishery systems remain scarce. Here we discuss trends within the Gulf of California's jumbo squid fishery in the context of relevant climate drivers, ecological dynamics, and mesoscale oceanographic processes. Following the 2009-2010 El Nino event, the jig-based fishery collapsed as squid adopted the small size-at-maturity phenotype characteristic of this species in the equatorial portion of its range. Analysis of regional sea surface temperatures and heights indicates a pronounced shift in the oceanographic trajectory of the system between the 2009-2010 and 2015-2016 El Nino events, whereas in situ hydrographic sampling reveals coincident changes in subsurface temperature and salinity. With persistently tropical oceanic conditions present across critical portions of their pelagic habitat, jumbo squid have lost access to previously productive coastal foraging zones, which in turn has limited opportunities for fishery recovery. Given the importance of jumbo squid to the region's pelagic marine foodwebs, the long-term persistence of such phenomena could have significant implications for local fisheries, economies, and livelihoods.
机译：年际海洋振荡，气候变化和极端事件给中上层渔业的管理提出了重大而复杂的挑战。近年来，东北太平洋地区已报告海洋和大气情况异常，但有关影响特定生物，种群和渔业系统的生物物理机制的研究结果仍然很少。在这里，我们在相关气候驱动因素，生态动力学和中尺度海洋学过程的背景下，讨论了加利福尼亚湾巨型鱿鱼渔业内的趋势。在2009-2010年厄尔尼诺事件之后，由于鱿鱼在其赤道范围内采用了该物种的成熟时小表型特征，因此以夹具为基础的渔业崩溃了。对区域海表温度和高度的分析表明，该系统的海洋轨迹在2009-2010年和2015-2016年厄尔尼诺事件之间发生了明显变化，而原位水文采样显示了地下温度和盐度的同时变化。由于在中上层生境的关键区域持续存在热带海洋条件，巨型鱿鱼无法进入以前高产的沿海觅食区，这反过来又限制了渔业的恢复机会。鉴于巨型鱿鱼对该地区中上层海洋食物网的重要性，这种现象的长期存在可能对当地渔业，经济和生计产生重大影响。

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