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首页> 外文期刊>Mediterranean Marine Science >Loggerhead sea turtle, Caretta caretta, presence and its exposure to floating marine litter in the Sardinia Channel and the Strait of Sicily: results from seven years of monitoring using ferry as platform of observation
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Loggerhead sea turtle, Caretta caretta, presence and its exposure to floating marine litter in the Sardinia Channel and the Strait of Sicily: results from seven years of monitoring using ferry as platform of observation

机译：Loggerhead海龟，Caretta Caretta，在撒丁岛通道浮动海洋垃圾和西西里岛海峡的暴露：结果来自渡轮的七年监测作为观察平台

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The loggerhead turtle is the most common sea turtle species in the Mediterranean Sea. Despite relevant research efforts, information of its distribution is still scarce, particularly in the open sea where they may be exposed to different threats among which marine litter is of great concern. Here we investigated the distribution of loggerhead turtles and floating marine macro litter (FMML) in the Sardinia Channel and Strait of Sicily, a key area of the central Mediterranean Sea, by using 7 years of data collected by experienced observers aboard passenger ferries along commercial routes. The high-risk exposure areas were identified and the influence of upper layer currents on turtle and FMML distribution was evaluated. Overall, loggerhead sighting rates were higher than those reported from other Mediterranean routes but the distribution of turtles within the study area was clearly heterogeneous and influenced by the surface circulation pattern. Summer sighting rates were significantly higher in the Sardinia Channel with respect to the Strait of Sicily. Analysis of the co-occurrence of FMML and loggerhead turtles identified a priority risk area in the central Sardinian channel where the large South-Eastern Sardinia Gyre acts as a trap for both animals and FMML. This study corroborates the effectiveness of using passenger ferries as platforms of observation to conduct systematic surveys of sea turtles and floating macro litter in offshore areas. Results highlighted the importance of the Sardinia Channel and Strait of Sicily for the loggerhead turtle and the areas of greater risk of exposure to the marine litter threat.
机译：Loggerhead Turtle是地中海中最常见的海龟物种。尽管有相关的研究努力，但其分配的信息仍然稀缺，特别是在开阔的海洋中，他们可能会暴露在不同的威胁中，海洋垃圾是非常关注的。在这里，我们通过使用经验丰富的观察员沿着商业路线收集的乘客渡轮收集的7年数据，调查了撒丁头龟和浮动海洋宏垃圾（FMML）的撒丁目海峡和西西里岛海峡的海峡。确定了高风险暴露区域，并评估了上层电流对龟和FMML分布的影响。总体而言，Loggerhead瞄准率高于来自其他地中海路线报告的瞄准率，但研究区域内的乌龟的分布显然是过度异质的并且受到表面循环模式的影响。撒丁岛渠道的夏季瞄准率在西西里岛海峡方面显着高。对FMML和Loggerhead龟的共同发生分析确定了中央撒丁岛渠道中的优先风险区域，其中大东南部的撒丁岛GYRE充当动物和FMML的陷阱。本研究证实了使用乘客渡轮作为观察平台的有效性，以便在海上地区进行海龟和浮宏垃圾的系统调查。结果强调了撒丁岛通道和西西里岛海峡的重要性，为伐木龟以及暴露于海洋垃圾威胁的更大风险的领域。

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