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The influence of the trawl mouth opening size and net colour on catch efficiency during sampling of early fish stages
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SYSNO ASEP 0349531 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The influence of the trawl mouth opening size and net colour on catch efficiency during sampling of early fish stages Author(s) Jůza, T. (CZ)
Čech, Martin (BC-A) RID, ORCID
Kubečka, Jan (BC-A) RID, ORCID
Vašek, Mojmír (BC-A) RID, ORCID
Peterka, Jiří (BC-A) RID, ORCID
Matěna, Josef (BC-A) RIDSource Title Fisheries Research. - : Elsevier - ISSN 0165-7836
Roč. 105, č. 3 (2010), s. 125-133Number of pages 9 s. Language eng - English Country NL - Netherlands Keywords trawl efficiency ; fry density ; perch Subject RIV EH - Ecology, Behaviour R&D Projects GP206/09/P266 GA ČR - Czech Science Foundation (CSF) 1QS600170504 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z60170517 - HBU-Z, BC-A (2005-2011) UT WOS 000281181500001 DOI 10.1016/j.fishres.2010.03.010 Annotation The efficiency of different sized and coloured trawls were investigated in surface stratum of the Římov Reservoir during two surveys in spring 2007. No significant differences in efficiency and body lengths of the fry were found for any taxa when black and white trawls were compared. Comparison of the efficiencies of different sized trawls revealed different patterns for the dominant perch and cyprinids during both day and night. For perch, the lowest efficiency was observed for the smallest trawl, whereas the greatest efficiency was observed for the largest trawl. The efficiencies were significantly different between trawls during day and night only for perch. For cyprinids, the efficiencies of different sized trawls were insignificantly different during both day and night. Our results indicate that for sampling perch fry during both day and night, trawl with a 1 m2 mouth is not sufficiently efficient and the density of perch fry is significantly under estimated with such small net. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2011
Number of the records: 1