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Fischlaich als Nahrung von Vogeln


, : Fischlaich als Nahrung von Vogeln. Vogelwelt, 1116: 217-224

Fish spawn has rarely been mentioned in the ornithological literature as food of birds. Most authors regarded this type of diet as exceptional. Systematic surveys of water birds in the Grefswalder Bodden area (southern Baltic Sea, NE Germany), an area well-known as a herring spawning ground for more than 700 years, yielded many observations of birds eating spawn. During 1981 to 1990 there were 37 such records concerning 18 species and ca. 250,000 individuals. Herring spawn is especially important for wintering Long-tailed Ducks, up to 10,000 of which have been seen feeding on it on seven occasions. Concentrations of wintering Long-tailed Ducks are closely correlated with favoured herring spawning areas. According to our observations at Greifswalder Bodden fish spawn can also be an important component of the diet of Greater Scaup, Tufted Duck, Goldeneye and Black-headed Gull, at least temporarily.

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