Regional Studies in Marine Science ( IF 2.1 ) Pub Date : 2020-04-22 , DOI: 10.1016/j.rsma.2020.101303 José C. Báez , Juan A. Camiñas , Pilar Hernández , Marcelo Vasconcellos , Salvador García-Barcelona , David Macías
Dolphinfish is targeted by small-scale fisheries and is part of the bycatch of drifting surface longline targeting tuna and swordfish in the Mediterranean Sea. The main aim of the present study is to understand the effect of the North Atlantic Oscillation (NAO) on the dolphinfish bycatch of the Spanish longline fisheries in the Western Mediterranean Sea and, likewise on the catch of small-scale fisheries targeting dolphinfish associated to anchored fish aggregating devices (aFADs) in waters of the Balearic Islands. Understanding the impact of climatic effects is crucial to improve the assessment and management of the Mediterranean dolphinfish. In longline fisheries, the negative phases of the NAO with a short time lag increase the dolphinfish bycatch probability, with a CPUE higher than the mean of the study period. However, with a long time lag, the positive phases increase the dolphinfish bycatch probability, with a CPUE higher than the mean of the study period. On the other hand, when examining the Mallorca aFADs fisheries, the negative phases of the NAO with a long time lag increased the probability of catching fish with higher landings than the observed mean of the study period. The results suggest strong connections between the prevailing climate conditions in March and April and dolphinfish catches during the fishing season of this species in September and October.
中文翻译:
北大西洋涛动影响西地中海的海豚捕捞和兼捕
海豚鱼是小型渔业的目标,并且是在地中海中以金枪鱼和箭鱼为目标的浮标延绳钓兼捕的一部分。本研究的主要目的是了解北大西洋涛动(NAO)对西延海西班牙延绳钓渔业的海豚副渔获物的影响,以及对以锚定相关海豚为目标的小规模渔业捕捞的影响巴利阿里群岛水域中的鱼类聚集设备。了解气候影响的影响对于改善地中海海豚鱼的评估和管理至关重要。在延绳钓渔业中,短时滞的NAO负相增加了海豚鱼兼捕的可能性,CPUE高于研究期的平均值。但是,时间长了 正阶段增加了海豚鱼兼捕的可能性,CPUE高于研究期的平均值。另一方面,在检查马略卡岛aFADs渔业时,NAO的负相位具有较长的滞后性,因此增加了上岸量高于研究期平均观测值的鱼类被捕的可能性。结果表明,三月和四月的主要气候条件与该物种在九月和十月的捕捞季节中的海豚捕捞之间有很强的联系。长期滞后的NAO负相增加了以高于研究期观察到的均值捕获鱼的可能性。结果表明,三月和四月的主要气候条件与该物种在九月和十月的捕捞季节中的海豚捕捞之间有很强的联系。长期滞后的NAO负相增加了以高于研究期观察到的均值捕获鱼的可能性。结果表明,三月和四月的主要气候条件与该物种在九月和十月的捕捞季节中的海豚捕捞之间有很强的联系。