Abstract The coastal zone is a hotspot of biodiversity and anthropogenic activities. Its conservation is of major concern. To test whether different types of environmental disturbance have an impact on marine fishes, in this three-year study we have compared otolith shapes of Oblada melanura juveniles. One type of disturbance was the type of site: recreational harbours, waterway mouths, or preserved from identified sources of contamination. Another disturbance comes from the geographical zones mainly presenting different levels of population density. We have demonstrated that zones only separated by 20 km have an impact, and that, comparatively to preserved sites, waterway mouths do not impact fish otolith shape in contrast to mid-size recreational harbours. We highlighted that a minimum recreational harbour size may be needed to impact the marine environment. The present work opens up new perspectives for surveys of the impact on marine life of regulation policies and changes in human behaviour.

中文翻译：

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幼年 Oblada melanura (L. 1758) 耳石形状受到休闲港口附近或附近地点的定居点影响

摘要 海岸带是生物多样性和人类活动的热点。它的保护是一个主要问题。为了测试不同类型的环境干扰是否对海洋鱼类产生影响，在这项为期三年的研究中，我们比较了 Oblada melanura 幼鱼的耳石形状。一种类型的干扰是场地类型：休闲港口、水道口或从已确定的污染源中保存下来。另一个干扰来自主要呈现不同人口密度水平的地理区域。我们已经证明，仅相隔 20 公里的区域会产生影响，并且与保存完好的地点相比，与中型休闲港口相比，水道口不会影响鱼类耳石的形状。我们强调可能需要一个最小的休闲港口规模来影响海洋环境。目前的工作为调查监管政策对海洋生物的影响和人类行为的变化开辟了新的视角。