Human‐generated pressures are continuing to have a detrimental effect on diadromous fishes, resulting in legislative initiatives to conserve and manage these species. Field studies to inform these initiatives focus almost exclusively on larger marine, estuarine, and inland waters, neglecting the role of small coastal streams and tributaries in population recovery. As an example of the potential contribution of very small coastal streams to diadromous fish recruitment, we report here on the densities and distribution of European eel Anguilla anguilla L. and flounder Platichthys flesus (L.) in one such stream, “La Warenne,” in northeast France in October 1998 and 1999. Both species were found mainly in downstream sites in both years—flounder were captured in low numbers only, but mean CPUE values for eel were similar to the highest densities reported in the ICES WGEEL database for larger rivers of Great Britain, France and Spain in the Interreg Atlantic and North Sea areas. This small dataset illustrates that small coastal streams may represent an important, but overlooked, role in conservation strategies for European eel, and possibly flounder, indicating the need for further field studies and investigations of existing data sources to evaluate the contributions to diadromous fish recruitment of these poorly studied water courses.

中文翻译：

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沿海小溪流可能对保护下降和受威胁的鱼类，特别是欧洲鳗鱼造成潜在的影响

人为施加的压力继续对过缺鱼类造成不利影响，从而导致采取立法行动来保护和管理这些鱼类。为这些举措提供信息的实地研究几乎完全集中在较大的海洋，河口和内陆水域，而忽略了沿海小溪流和支流在人口恢复中的作用。由于非常小的沿海流海淡水洄游鱼类招聘的潜在贡献一个例子，我们在这里报告对欧洲鳗的密度和分布安圭拉安圭拉L.和比目鱼Platichthys flesus（L.）在1998年10月和1999年10月在法国东北部的一条这样的小溪“ La Warenne”中发现。这两种物种在这两年均主要在下游地点发现— f鱼的捕获数量很少，但鳗鱼的CPUE平均值为与ICES WGEEL数据库中报告的最高密度的报告相似，该密度报告是针对英特格勒大西洋和北海地区的英国，法国和西班牙的较大河流。这个小的数据集说明，沿海小溪流可能代表着欧洲鳗鱼（甚至可能是比目鱼）的保护战略中的重要但被忽视的作用，这表明需要进一步的实地研究和现有数据源的调查，以评估对捕捞过江鱼类的贡献。这些学得不好的水道。