Abstract Submarine canyons aggregate numerous marine species and can affect the structure of benthic communities. However, analyses dedicated to assess the spatial distribution variability among several canyons are rare. In the northwestern Mediterranean Sea, three major submarine canyons consecutively indent the narrow margin. There, the abundance of deep-sea blue and red shrimp Aristeus antennatus (Crustacea: Decapoda), one of the most important fishery-targeted species in the western and central Mediterranean Sea, sustains relatively high incomes for the nearest fishing harbors. To date, the spatial distribution of this shrimp species has only been assessed on known fishing grounds, but it has neither been modeled simultaneously covering several submarine canyons nor according to the environmental conditions. In this study, we aimed to look over the spatiotemporal shrimp distribution in a region of the northwestern Mediterranean Sea with a particular interest in variations in the three submarine canyons. From summer landing data between 2005 and 2014, we implemented a species distribution model with georeferenced catches linked to environmental data of the shrimp habitats. The model showed that the bottom topography was one of the most essential variables to explain the spatial distribution of the catches and that the highest catch rates were between 475 m and 575 m depth. Overall, two canyons (Blanes and Palamos) sheltered high estimates of catches on the shallow and narrow part of their margins (at 510 and 565 m depth). Among them, 60% of estimated summer catches came from the Palamos Canyon, but this estimate shifted to the Blanes Canyon in summer 2008, probably due to variations in fishing fleet behavior. Modeled hypothetical temperature changes scenarios (to 1 °C warmer than the average) suggested the shrimp catches would decrease less in the Blanes Canyon (3% fewer catches than the average) than in the Palamos Canyon (20% fewer catches than the average). The information produced by the species distribution model allowed setting spawning locations and depths, which is useful to better understand the canyon influence on benthic communities and to parameterize larval transport models.

中文翻译：

---

海底峡谷穿越的地中海西北部大陆边缘深海虾Aristeus天线（甲壳纲：十足目）的时空分布建模

摘要 海底峡谷聚集了大量的海洋物种，可以影响底栖群落的结构。然而，专门用于评估几个峡谷之间空间分布变异性的分析很少见。在地中海西北部，三个主要的海底峡谷连续缩进狭窄的边缘。在那里，丰富的深海蓝虾和红虾触角（甲壳纲：十足目）是地中海西部和中部最重要的渔业目标物种之一，为最近的渔港维持相对较高的收入。迄今为止，该虾种的空间分布仅在已知的渔场上进行了评估，但既没有同时覆盖多个海底峡谷，也没有根据环境条件对其进行建模。在这项研究中，我们的目标是查看地中海西北部地区虾的时空分布，特别关注三个海底峡谷的变化。从 2005 年到 2014 年的夏季登陆数据，我们实施了一个物种分布模型，其中地理参考捕获量与虾栖息地的环境数据相关联。该模型表明，底部地形是解释渔获量空间分布的最重要变量之一，最高渔获率在 475 m 至 575 m 深度之间。总体而言，两个峡谷（布拉内斯和帕拉莫斯）在其边缘的浅而窄的部分（深度为 510 和 565 m）提供了高估计的捕获量。其中，估计夏季捕获量的 60% 来自帕拉莫斯峡谷，但这一估计在 2008 年夏季转移到了布拉内斯峡谷，可能是由于捕鱼船队行为的变化。模拟的假设温度变化情景（比平均温度高 1°C）表明，布拉内斯峡谷的虾捕获量减少（比平均捕获量少 3%）比帕拉莫斯峡谷（比平均捕获量少 20%）少。物种分布模型产生的信息允许设置产卵位置和深度，这有助于更好地了解峡谷对底栖群落的影响并参数化幼虫运输模型。