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首页> 外文期刊>Estuarine Coastal and Shelf Science >The influence of environmental characteristics on fish larvae spatial patterns related to a marine protected area: The Medes islands (NW Mediterranean)
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The influence of environmental characteristics on fish larvae spatial patterns related to a marine protected area: The Medes islands (NW Mediterranean)

机译：环境特征对与海洋保护区有关的鱼幼虫空间格局的影响：梅迪斯群岛（地中海西北部）

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We assessed the linkages between environmental variables and the spatio-temporal distribution patterns of larval abundance of coastal fish assemblages within and outside the Medes Islands marine protected area (MPA; NW Mediterranean) to explore possible fisheries effects such as larvae export of the latter. We analyzed small-scale fish larvae distribution of 28 representative taxa from the rocky fish assemblage and combined the former in different groups with the help of cluster analysis. Further we assessed the influence of selected abiotic variables on group and species distributions using Generalized Additive Models (GAM's). We found a high level of variability in the response of larvae groups and species to environmental variables over the two studied periods (spring and summer); depth and habitat of the adults being the most important factors. In addition, distance to the MPA was found as an important variable in defining the location of larvae of strictly coastal species. Our results provided evidence of larval export of three commercial species affected by the MPA (Epinephetus marginatus, Pagellus erythrinus and Scorpaena porcus). Thus our study contributes to the few empirical assessments of larvae export from MPAs and adds to the understanding of the functioning of MPAs as fisheries management tools. Nevertheless, in the future integrated assessments of fisheries effects of MPAs are required that measure the effect of larvae and biomass export on increased fishing yield while taking into account fishing effort dynamics.
机译：我们评估了环境变量与梅德斯群岛海洋保护区（MPA；西北地中海）内外的沿海鱼类种群幼体数量的时空分布格局之间的联系，以探讨可能的渔业影响，例如后者的幼体出口。我们分析了岩石鱼类组合中28种代表性分类单元的小型鱼幼体分布，并在聚类分析的帮助下将前者分成不同的组。此外，我们使用通用添加剂模型（GAM）评估了选定的非生物变量对种群和物种分布的影响。在两个研究时期（春季和夏季），我们发现幼虫群体和物种对环境变量的响应具有高度的可变性。成年人的深度和栖息地是最重要的因素。此外，发现与MPA的距离是定义严格沿海物种幼体位置的重要变量。我们的结果提供了受MPA影响的三种商业物种幼虫出口的证据（Epinephetus marginatus，Pagellus erythrinus和Scorpaena porcus）。因此，我们的研究有助于对MPAs幼体出口的一些实证评估，并加深了对MPA作为渔业管理工具的功能的理解。然而，将来需要对海洋保护区的渔业影响进行综合评估，以衡量幼虫和生物量出口对增加的捕捞产量的影响，同时考虑捕捞努力的动态。

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