Food patterns of Neogobius (Perciformes: Gobiidae) species within the longitudinal profile of the Danube River

POLAČIK, Matej, Markéta ONDRAČKOVÁ, Zdeněk ADÁMEK, Teodora TRICHKOVA, Milen VASSILEV, Eva NYKLOVÁ and Jan SYCHRA. Food patterns of Neogobius (Perciformes: Gobiidae) species within the longitudinal profile of the Danube River. In Danube.River.Life 36th International Conference International Association for Danube Research, Book of Abstracts. 2006. ISBN 3-9500723-1-4.

Basic information

• Original name: Food patterns of Neogobius (Perciformes: Gobiidae) species within the longitudinal profile of the Danube River
• Name in Czech: Potrava hlaváčů rodu Neogobius v podélném profilu Dunaje
• Authors: POLAČIK, Matej (703 Slovakia, guarantor, belonging to the institution), Markéta ONDRAČKOVÁ (203 Czech Republic, belonging to the institution), Zdeněk ADÁMEK (203 Czech Republic), Teodora TRICHKOVA (100 Bulgaria), Milen VASSILEV (100 Bulgaria), Eva NYKLOVÁ (203 Czech Republic) and Jan SYCHRA (203 Czech Republic, belonging to the institution).
• Edition: Danube.River.Life 36th International Conference International Association for Danube Research, Book of Abstracts, 2006.

Other information

• Original language: English
• Type of outcome: Conference abstract
• Field of Study: 10600 1.6 Biological sciences
• Country of publisher: Austria
• Confidentiality degree: is not subject to a state or trade secret
• RIV identification code: RIV/00216224:14310/06:00017950
• Organization unit: Faculty of Science
• ISBN: 3-9500723-1-4
• Keywords in English: food; Neogobius kessleri; N. melanostomus; N. fluviatilis; Danube
• Tags: Danube, food, N. fluviatilis, N. melanostomus, Neogobius kessleri

Abstract

Food habits of three Neogobius species (N. kessleri, N. fluviatilis and N. melanostomus) were studied in Austrian, Slovak, Croatian and Bulgarian stretches of the River Danube. The results were compared with the composition of macrozoobenthos with the aim to evaluate the level of food selectivity in individual Neogobius species and food competition between them. Crustaceans (Corophium, Dikerogammarus and Jarea) predominated in food offer in upper sampling sites whilst lower sampling sites were colonized mainly by molluscs. Besides them, numerous occurrences of the mysid Limnomysis benedeni were recorded in Slovak and Croatian section of Danube respectively. The diet of gobiids consisted mainly by dominating benthic animals - amphipods and molluscs.

Abstract (in Czech)

Potravní preference tří druhů hlaváčů rodu Neogobius (N. kessleri, N. fluviatilis a N. melanostomus) byla sledována na rakouském, slovenském, chorvatském a bulharském úseku Dunaje. Výsledky byly porovnány s potravní nabídkou s cílem vyhodnotit potravní selektivitu a kompetici mezi druhy. V potravní nabídce dominovali korýši v horním úseku Dunaje a měkkýši v dolním úseku Dunaje. Kromě toho se ve slovenském a chorvatském úseku vyskytoval ve vysoké početnosti Limnomysis benedeni. Potrava gobiidů sestávala především z dominantní složky bentosu - korýšů a měkkýšů.

Links

• GP524/05/P291, research and development project: Name: Parazitismus a invazní druhy: vliv parazitárního napadení na biologii Neogobius kessleri v původní a nepůvodní oblasti rozšíření
• MSM0021622416, plan (intention): Name: Diverzita biotických společenstev a populací: kauzální analýza variability v prostoru a čase

Investor: Ministry of Education, Youth and Sports of the CR, Diversity of Biotic Communities and Populations: Causal Analysis of variation in space and time