Feeding habits of two introduced fish species (Lepomis gibbosus, Pseudorasbora parva) in Neusiedler See (Austria), with special reference to chironomid larvae (Diptera: Chironomidae).

摘要: In Neusiedler See, a turbid shallow lake, Lepomis gibbosus (L.) and Pseudorasbora parva (Temminck & Schlegel) occur in large numbers within the reed belt. April, June/July, August September 1995, fishes were collected for gut analyses. The diet of both species consisted mainly chironomid larvae. 0+ L. whose total length exceeded 26 mm P. larger than 32 preyed on chironomids almost exclusively. food >0+ gibbosus, addition to chironomids, was made up other aquatic insects (e.g. Zygoptera nymphs, Corixidae Trichoptera larvae), gastropods Asellus aquaticus showed distinct seasonal variations. Detailed analyses larvae stomachs two fish provided valuable information their feeding grounds. Whereas sediment-dwelling preferred epiphytic species. Diet overlaps between abundant belt (Anguilla anguilla (L.), Blicca bjoerkna Gymnocephalus cernuus (L.)) are discussed.