The decline of otter Lutra lutra populations in the region of the pays de loire, Western France
作者： Thierry Lodé
DOI: 10.1016/0006-3207(93)90190-C
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摘要: In the Pays de Loire region of western France, a field survey carried out between 1984 and 1991 showed that otter populations decreased over 54.2% sites are now highly fragmented. only 9.5% 348 produced positive records compared to 20.7% in 1984. The decline was most notable larger rivers whereas relative use marsh habitat increased. Populations become more vulnerable when riparian vegetation clines. Accidental drowning eel Anguilla anguilla fyke nets appears be major cause accidental mortal ity. scarcity is an indication serious degradation aquatic ecosystems.
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