Do non-native fish as prey favour the conservation of the threatened indigenous Eurasian otter?

摘要: Summary 1. Biological invasions are considered a major threat to biodiversity. Most research has focused on the distribution, biology and impacts of non-native species native fauna flora. However, few studies have explored their role as prey for predators conservation concern. 2. To assess incidence intensity predation by Eurasian otter Lutra lutra established fish species, data were collated from published literature. To be selected, had cover at least 1 year, analyse more than 100 spraints report study period percentage relative frequency (%RF) all species. 3. To permit reliable, time-related comparisons with %RF fishes in diet, we also reviewed available information about both distribution history introductions European countries, revealing decrease longitude number naturalised taken (ranging between 5 34) each assemblage. 4. Our selective criteria met 30 dietary 44 areas 15 countries during 1970–2010. The extent which otters rely was almost negligible (mean %RF = 4.8), preyed upon decreasing latitude longitude. 5. The diet increased slightly time, preying significantly where alterations assemblage been highlighted reference papers. No relationship found breadth occurrence diet. 6. The current suggests that effective management plans should focus maintenance and/or enhancement assemblages.