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首页> 外文期刊>ICES Journal of Marine Science >The fisheries history of small pelagics in the Northern Mediterranean
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The fisheries history of small pelagics in the Northern Mediterranean

机译：地中海北部小中上层渔业的渔业历史

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摘要

Since 2007, the biomass of sardine and anchovy in the NW Mediterranean has remained persistently low, whereas the biomass of the commercially low-valued sprat has exploded. Also, simultaneous decreases in condition, size, and/or age of these populations were observed. Altogether, this resulted in a drop in landings of small pelagics. To understand the amplitude of these events and to provide a baseline scenario against which current changes can be compared, we compiled exceptionally long landing series (1865-2013) of sardine, anchovy, and mackerel for different subregions of the southern French coast. We characterized the fluctuations of these landings and compared these with environmental drivers (sea surface temperature, Rhone river discharge, North Atlantic Oscillation, Western Mediterranean Oscillation-WeMO, and Atlantic Multidecadal Oscillation-AMO), using different time-series analyses. We also collated historical data to infer qualitative changes in fishing effort over time. A fishing effort related increase in landings was observed around 1962 for all three species, although current sardine landings have dropped below levels observed before this period. Sardine and anchovy landings were, respectively, positively and negatively related to the AMO index and anchovy landings were also positively related to the WeMO. We finished by discussing the potential role of the environmental variables and fishing on long-term fishery landings trends.
机译：自2007年以来，西北地中海地区的沙丁鱼和an鱼生物量一直保持较低水平，而商业价值低的西鲱的生物量却呈爆炸性增长。同样，观察到这些人群的状况，大小和/或年龄同时下降。总体而言，这导致小型远洋渔业的着陆量下降。为了了解这些事件的幅度并提供可以与当前变化进行比较的基准情景，我们针对法国南部沿海不同分区编制了沙丁鱼，an鱼和鲭鱼的超长着陆系列（1865-2013年）。我们对这些着陆的波动进行了描述，并将其与环境驱动因素（海表温度，罗纳河流量，北大西洋涛动，西地中海涛动-WeMO和大西洋多年代涛动-AMO）进行了比较，并使用了不同的时间序列分析。我们还整理了历史数据，以推断捕捞努力随时间的质变。 1962年前后，这三个物种的捕捞努力都与上岸量的增加有关，尽管目前沙丁鱼的上岸量已降至该时期之前的水平以下。沙丁鱼和an鱼着陆分别与AMO指数正相关和负相关，an鱼着陆也与WeMO正相关。最后，我们讨论了环境变量和捕鱼对长期渔业登陆趋势的潜在作用。

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