The influence of diel period on fish assemblage in the unstructured littoral of reservoirs

0366518 - BC 2012 RIV US eng J - Journal Article
Říha, Milan - Kubečka, Jan - Prchalová, Marie - Mrkvička, Tomáš - Čech, Martin - Draštík, Vladislav - Frouzová, Jaroslava - Hohausová, Eva - Jůza, Tomáš - Kratochvíl, Michal - Peterka, Jiří - Tušer, Michal - Vašek, Mojmír
The influence of diel period on fish assemblage in the unstructured littoral of reservoirs.
Fisheries Management and Ecology. Roč. 18, č. 4 (2011), s. 339-347. ISSN 0969-997X. E-ISSN 1365-2400
R&D Projects: GA ČR(CZ) GA206/07/1392; GA MZe(CZ) QH81046
Institutional research plan: CEZ:AV0Z60170517
Keywords : beach seining * diel migration * sampling * species composition * Římov Reservoir
Subject RIV: EG - Zoology
Impact factor: 1.294, year: 2011

Diel changes in littoral fish assemblage were studied in four reservoirs in the Czech Republic (Central Europe). The sampling was performed by beach seining in an unstructured littoral zone. Perch, Perca fluviatilis L., roach, Rutilus rutilus (L.), bream, Abramis brama (L.), carp, Cyprinus carpio L., ruffe, Gymnocephalus cernua (L.), pikeperch, Sander lucioperca (L.), eel, Anguilla anguilla (L.) and A. brama · R. rutilus hybrids exhibited higher densities at night. Only bleak, Alburnus alburnus (L.) exhibited higher densities during the day. The number of species was higher in night hauls, and mean body size of roach and bleak was also higher at night. Diel changes in fish densities resulted in the change in species composition between day and night. The study has implication for the sampling design to assess littoral fish assemblages using beach seine netting and recommends night sampling for a representative assessment or sampling during both diel periods for a robust assessment.
Permanent Link: http://hdl.handle.net/11104/0201487