Fish size selection and diet composition of Eurasian otters (Lutra lutra) in salmonid streams: Picky gourmets rather than opportunists? | Knowledge and Management of Aquatic Ecosystems

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Fig. 2

Otter diet composition as percentage relative frequency of occurrence (RFO) and relative biomass (BIO) in salmonid streams (n = 3). Bars show mean ± SD (standard deviation). Prey categories from left to right: salmonids, bullhead, other fish, crayfish, amphibians, reptiles, mammals, birds and insects.

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