Trends and drivers of marine fish landings in Portugal since its entrance in the European Union
Trends and drivers of marine fish landings in Portugal since its entrance in the European Union
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DOI：
10.1093/icesjms/fsaa010
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发表时间：
2020-05-01
影响因子：
3.3
通讯作者：
Queiroga, Henrique
中科院分区：
文献类型：
--
作者：
Bueno-Pardo, Juan;Pierce, Graham J.;Queiroga, Henrique
在过去的20年里，葡萄牙海洋登陆量的下降速度高于捕鱼量的下降速度。确定推动捕捞数量和组成的变量对于了解涉及复杂社会和环境因素的渔业部门的动态至关重要。在这项研究中，我们调查了1989年至2014年间葡萄牙大陆海鱼登陆的主要驱动因素。为了确定时间序列的共同趋势，并量化环境因素的重要性，我们应用了一个动态因素分析，考虑了四个区域和三种类型的渔具（拖网捕鱼、围网捕鱼和多渔具捕鱼）。我们的研究结果表明，无论是从长期还是短期来看，捕鱼努力都是推动葡萄牙海洋登陆的最相关因素。此外，冬季河流流量和春季东大西洋遥相关指数等环境因素的影响也不可忽视，可能通过影响沿海生产力的机制。在研究期间，我们提供了全面的信息，使我们能够更好地了解葡萄牙最重要的商业物种的趋势。
Marine landings in Portugal have decreased at a higher rate than fishing effort in the last 20 years. Identifying the variables driving the quantity and composition of landings is pivotal to understand the dynamics of the fisheries sector, which entails complex social and environmental aspects. In this study, we investigate the main drivers of marine fish landings in continental Portugal between 1989 and 2014. To identify common trends in time series, and quantify the importance of environmental factors, we applied a dynamic factor analysis considering four regions and three types of gear (trawling, purse-seine, and a multi-gear fishery). Our results show the importance of fishing effort as the most relevant factor driving marine landings in Portugal, both at the long and short terms. In addition, the effect of environmental factors such as the winter river discharge and the spring East Atlantic Teleconnection index should not be neglected, probably through mechanisms affecting coastal productivity. We provide a comprehensive amount of information that permits to improve our understanding of the trends of the most important commercial species in Portugal during the period of study.