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Species-specific gradients of juvenile fish density and size in pelagic areas of temperate reservoirs
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SYSNO ASEP 0443153 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Species-specific gradients of juvenile fish density and size in pelagic areas of temperate reservoirs Author(s) Jůza, Tomáš (BC-A) RID, ORCID
Ricard, Daniel (BC-A) RID
Blabolil, Petr (BC-A) RID, ORCID
Čech, Martin (BC-A) RID, ORCID
Draštík, Vladislav (BC-A) RID, ORCID
Frouzová, Jaroslava (BC-A) RID, ORCID
Muška, Milan (BC-A) RID, ORCID
Peterka, Jiří (BC-A) RID, ORCID
Prchalová, Marie (BC-A) RID, ORCID
Říha, Milan (BC-A) RID, ORCID
Sajdlová, Zuzana (BC-A) RID, ORCID
Šmejkal, Marek (BC-A) RID, ORCID
Tušer, Michal (BC-A) RID, ORCID
Vašek, Mojmír (BC-A) RID, ORCID
Vejřík, Lukáš (BC-A) RID, ORCID
Kubečka, Jan (BC-A) RID, ORCIDSource Title Hydrobiologia. - : Springer - ISSN 0018-8158
Roč. 762, č. 1 (2015), s. 169-181Number of pages 13 s. Language eng - English Country NL - Netherlands Keywords trawling ; juvenile density ; horizontal distribution ; vertical distribution ; tributary area Subject RIV EH - Ecology, Behaviour R&D Projects EE2.3.20.0204 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EE2.3.30.0032 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) 7F14316 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support BC-A - RVO:60077344 UT WOS 000364635100014 EID SCOPUS 84946495731 DOI 10.1007/s10750-015-2346-6 Annotation Data from nine reservoirs in the Czech Republic were used to investigate density and size distribution patterns for dominant fish species of the juvenile pelagic community at night. Clear trends of increasing density along the longitudinal gradient for bream, roach, bleak, and pikeperch were observed in long ([5 km) reservoirs but were absent in short reservoirs. Increasing body size towards the tributary was observed for bream, perch, pikeperch, and ruffe. Cyprinids showed a clear affinity to the surface layer (0–3 m) of long reservoirs, while pikeperch and ruffe juveniles occurred homogeneously at depths down to six meters. Perch juveniles had the highest densities especially in 3–6 m water layer. Size did not change with sampling depth for any species in the reservoirs studied. Our data showed gentle spatial segregation of different juvenile fish species. Although the tributary area is usually the most productive, it is not able to support all juveniles leading to inter- and intra-specific competition and the relegation of juveniles of some species to less productive habitat. This trend was more apparent in long reservoirs with strong trophic gradients. The gradient of nutrients seems to be an important factor driving fish distribution along longitudinal profile of reservoirs. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2016
Number of the records: 1