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Gap analysis revealed a moderate efficiency of protected areas for the conservation of the endangered noble crayfish in Croatia

The noble crayfish is a native European freshwater species, endangered due to the strong anthropogenic influence on its habitats, climate change, and invasive crayfish species. In the present study, we aimed to assess the effectiveness of nationally designated protected areas and the pan-European Natura 2000 network in representing and maintaining over time the noble crayfish diversity using a comprehensive species occurrence dataset. Overall, our gap analysis indicated moderate efficiency of the existing protected areas in covering the noble crayfish diversity. Overlapping the distribution map of the noble crayfish with the map of protected areas revealed that protected areas encompass 50% of recorded populations. This study can serve as an evaluation of the protected areas in conservation of this key freshwater crayfish species.

Astacus astacus, Astacidae, Natura 2000 network, conservation planning, biodiversity conservation

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