Seasonal diet pattern of non-native tubenose goby (Proterorhinus semilunaris) in the lowland reservoir (Mušov, Czech Republic)

0346456 - ÚBO 2011 RIV FR eng J - Journal Article
Adámek, Z. - Jurajda, Pavel - Prášek, Václav - Sukop, I.
Seasonal diet pattern of non-native tubenose goby (Proterorhinus semilunaris) in the lowland reservoir (Mušov, Czech Republic).
Knowledge and Management of Aquatic Ecosystems. Roč. 397, 02 (2010), s. 1-12. ISSN 1961-9502. E-ISSN 1961-9502
R&D Projects: GA MŠMT LC522
Institutional research plan: CEZ:AV0Z60930519
Keywords : Gobiidae * food * lowland reservoir * rip-rap bank * the Dyje River
Subject RIV: EG - Zoology
Impact factor: 0.304, year: 2010

The tubenose goby (Proterorhinus semilunaris) is a gobiid species currently extending its area of distribution in Central Europe. The objective of the study was to evaluate the annual pattern of its feeding habits in the newly colonised habitats of the Mušov reservoir on the Dyje River (the Danube basin, Czech Republic) with respect to natural food resources. In the reservoir, tubenose goby has established a numerous population, densely colonising stony rip-rap banks. Its diet was exclusively of animal origin with significant dominance of and preference for two food items - chironomid (Chironomidae) larvae and waterlouse (Asellus aquaticus). In the annual pattern, a remarkable preference for chironomid larvae was recorded in the summer period whilst waterlouse were consumed predominantly in winter months. The proportion of other food items was rather marginal. Certain signs of cannibalism were also recorded, with 0.9 and 0.2% of the diet consisting of their own progeny and eggs, respectively.
Permanent Link: http://hdl.handle.net/11104/0187480