Báez José C, Macías David, García-Barcelona Salvador, Real Raimundo
Instituto Español de Oceanografía, Centro Oceanográfico de Málaga, Puerto Pesquero s/n, Fuengirola, 29640 Málaga, Spain ; Biogeography, Diversity, and Conservation Research Team, Department of Animal Biology, University of Málaga, 29071 Málaga, Spain.
Instituto Español de Oceanografía, Centro Oceanográfico de Málaga, Puerto Pesquero s/n, Fuengirola, 29640 Málaga, Spain.
ScientificWorldJournal. 2014 Feb 10;2014:861396. doi: 10.1155/2014/861396. eCollection 2014.
Recent studies showed that regional abundance of loggerhead and leatherback turtles could oscillate interannually according to oceanographic and climatic conditions. The Western Mediterranean is an important fishing area for the Spanish drifting longline fleet, which mainly targets swordfish, bluefin tuna, and albacore. Due to the spatial overlapping in fishing activity and turtle distribution, there is an increasing sea turtle conservation concern. The main goal of this study is to analyse the interannual bycatch of loggerhead and leatherback turtles by the Spanish Mediterranean longline fishery and to test the relationship between the total turtle by-catch of this fishery and the North Atlantic Oscillation (NAO). During the 14 years covered in this study, the number of sea turtle bycatches was 3,940 loggerhead turtles and 8 leatherback turtles, 0.499 loggerhead turtles/1000 hooks and 0.001014 leatherback turtles/1000 hooks. In the case of the loggerhead turtle the positive phase of the NAO favours an increase of loggerhead turtles in the Western Mediterranean Sea. However, in the case of leatherback turtle the negative phase of the NAO favours the presence of leatherback turtle. This contraposition could be related to the different ecophysiological response of both species during their migration cycle.
最近的研究表明，蠵龟和棱皮龟在区域内的数量丰度可能会根据海洋学和气候条件逐年波动。西地中海是西班牙延绳钓船队的一个重要捕鱼区域，该船队主要捕捞旗鱼、蓝鳍金枪鱼和长鳍金枪鱼。由于捕捞活动和海龟分布在空间上存在重叠，海龟保护问题日益受到关注。本研究的主要目标是分析西班牙地中海延绳钓渔业每年误捕蠵龟和棱皮龟的情况，并检验该渔业误捕海龟总数与北大西洋涛动（NAO）之间的关系。在本研究涵盖的14年中，误捕海龟的数量为3940只蠵龟和8只棱皮龟，即每1000个鱼钩误捕0.499只蠵龟和0.001014只棱皮龟。就蠵龟而言，北大西洋涛动的正相位有利于西地中海蠵龟数量的增加。然而，就棱皮龟而言，北大西洋涛动的负相位有利于棱皮龟的出现。这种相反情况可能与这两个物种在其洄游周期中的不同生态生理反应有关。
