THE DIET OF STELLER'S EIDERS WINTERING IN VARANGERFJORD, NORTHERN NORWAY

We examined the winter diet of Steller's Eiders (Polysticta stelleri) in Varangerfjord, northern Norway, by analyzing the esophagus content of 29 individuals (12 juveniles and 17 adults). A total of 8389 prey items of 31 species were identified: 13 species of gastropods (making up 68.4% of tota...

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Veröffentlicht in:	The Wilson bulletin (Wilson Ornithological Society) 2000-03, Vol.112 (1), p.8-13
Hauptverfasser:	Bustnes, Jan O, Asheim, Magne, Bjørn, Tor Harry, Gabrielsen, Heidi, Systad, Geir H
Format:	Artikel
Sprache:	eng
Schlagworte:	adults Animal and plant ecology Animal, plant and microbial ecology Animals Autoecology Aves Biological and medical sciences Birds body condition CONTENTS Crustacea Crustaceans Diet Ducks Echinodermata Eider energy requirements esophagus Female animals Fundamental and applied biological sciences. Psychology Gastropoda Health aspects juveniles Lagoons Laminaria macroalgae Male animals Marine Marine ecology Mytilus edulis Norway Polysticta stelleri vegetation Vertebrata Wildlife ecology Young animals
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Zusammenfassung:	We examined the winter diet of Steller's Eiders (Polysticta stelleri) in Varangerfjord, northern Norway, by analyzing the esophagus content of 29 individuals (12 juveniles and 17 adults). A total of 8389 prey items of 31 species were identified: 13 species of gastropods (making up 68.4% of total number of items); 4 species of bivalves (18.5%); 12 species of crustaceans (13%); and 2 species of echinoderms (
ISSN:	0043-5643 2162-5204
DOI:	10.1676/0043-5643(2000)112[0008:TDOSSE]2.0.CO;2