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The food composition of goosander was determined based on the stomach contents of dead birds found along the San River between the localities of Zwierzyn and Lesko on February 12-14, 2012. The food composition of six birds was determined. The number of birds feeding in the study area was estimated to be between 0.7 to 11 individuals per 100 m of the river. The dominant prey of the goosander were brook...
The aim of the study was to determine the food preferences of the black cormorant and to assess fisheries losses in Włocławski Reservoir. Twenty fish species were identified in the cormorant diet. The dominant species were ruff and perch (29.4% and 24.4 % of the weight share, respectively). Roach (11.9%) and Prussian carp (10.9%) were also important components of the cormorant diet. The share of invasive...
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