The form and structure of fish otoliths are species specific. The validity of using ololiths found in pellets to determine the number, size and weight of fish consumed was tested on cormorants. They were fed with fishes of known number, size and weight; pellets were recovered after 24 hours. Sandsmelt (Atherina boyeri), striped mullet (Mugil cephalus), sole (solea vulgaris) and eel (Anguilla anguilla) were used. It was found that it is possible to estimate the size and weight of prey consumed by birds from size or weight of the otoliths recovered from pellets.
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Univ S Bohemia, Res Inst Fish Culture & Hydrobiol, Vodnany 38925, Czech RepublicUniv S Bohemia, Res Inst Fish Culture & Hydrobiol, Vodnany 38925, Czech Republic
Adamek, Zdenek
Kortan, Jiri
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Univ S Bohemia, Res Inst Fish Culture & Hydrobiol, Vodnany 38925, Czech RepublicUniv S Bohemia, Res Inst Fish Culture & Hydrobiol, Vodnany 38925, Czech Republic
Kortan, Jiri
Flajshans, Martin
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Univ S Bohemia, Res Inst Fish Culture & Hydrobiol, Vodnany 38925, Czech RepublicUniv S Bohemia, Res Inst Fish Culture & Hydrobiol, Vodnany 38925, Czech Republic