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European Journal of Wildlife Research

, Volume 50, Issue 4, pp 173–178 | Cite as

Diet spectrum of great cormorants (Phalacrocorax carbo sinensis L.) at the Donji Miholjac carp fishponds in eastern Croatia

  • Anđelko Opačak
  • Tihomir Florijančić
  • Dražen Horvat
  • Siniša Ozimec
  • Dragutin Bodakoš
Original Paper

Abstract

This paper reports the results of a diet analysis from the digestive tracts of 203 great cormorants shot at the Donji Miholjac fishponds in eastern Croatia, in the period 2000–2002. Eight fish species were determined. The dominant species was common carp (Cyprinus carpio) with a relative frequency of 73.4%, followed by grass carp (Ctenopharingodon idella) (11.6%), bighead carp (Aristichthys nobilis) (7.2%), pikeperch (Sander lucioperca) (2.0%), wels catfish (Silurus glanis) (1.7%), pike (Esox lucius) (1.5%), topmouth gudgeon (Pseudorasbora parva) (1.5%) and Prussian carp (Carassius auratus gibelio) (1.1%). The diet spectrum of the great cormorants from the Donji Miholjac fishponds was in accordance with the structure of the fish population in the fishponds. The average stomach weight per bird was 244 g. When birds shot with an empty stomach were excluded, the average stomach weight increased to 286 g. The length of consumed fish ranged from 40–335 mm, with 47% of the fish belonging to the length category 100–149 mm. The study revealed no significant relationship between the weight of the consumed fish and the body weight of male and female cormorants.

Keywords

Great cormorant (Phalacrocorax carbo sinensis L.) Diet Carp Fishponds 

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Anđelko Opačak
    • 1
  • Tihomir Florijančić
    • 1
  • Dražen Horvat
    • 1
  • Siniša Ozimec
    • 2
  • Dragutin Bodakoš
    • 3
  1. 1.Faculty of AgricultureJosip Juraj Strossmayer University of OsijekOsijekCroatia
  2. 2.Department of BiologyJosip Juraj Strossmayer University of OsijekOsijekCroatia
  3. 3.Faculty of Food TechnologyJosip Juraj Strossmayer University of OsijekOsijekCroatia

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