Hydroacoustic observations of surface shoaling behaviour of young-of-the-year perch Perca fluviatilis (Linnaeus, 1758) with a towed upward-facing transducer

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dc.contributor.authorProbst, Wolfgang Nikolausdeu
dc.contributor.authorThomas, Gregordeu
dc.contributor.authorEckmann, Reiner
dc.date.accessioned2011-03-24T17:38:30Zdeu
dc.date.available2011-03-24T17:38:30Zdeu
dc.date.issued2009deu
dc.description.abstractThe near-surface distribution of young-of-the-year perch was observed with a towed upward beaming echosounder system (SIMRAD EK60 with a circular 7◦ transducer). Perch aggregated densely in the epilimnion during daytime and dispersed evenly below the surface at night. Shoaling commenced in late June when perch metamorphosed from the larval to juvenile stage. Average shoal width was 6.6 m and average shoal height was 2.35 m in July, when perch were observed for the last time in the pelagic zone of Lake Constance.
Upward echosounding revealed the presence and near-surface distribution of pelagic juvenile perch and therefore this method can be used as a complementary survey tool to get more precise information about the distribution, behaviour and abundance of near-surface fish.		eng
dc.description.versionpublished
dc.format.mimetypeapplication/pdfdeu
dc.identifier.citationFirst publ. in: Fisheries Research, 96 (2009), 2-3, pp. 133-138deu
dc.identifier.doi10.1016/j.fishres.2008.10.009
dc.identifier.ppn302725261deu
dc.identifier.urihttp://kops.uni-konstanz.de/handle/123456789/7919
dc.language.isoengdeu
dc.legacy.dateIssued2009deu
dc.rightsAttribution-NonCommercial-NoDerivs 2.0 Generic
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.0/
dc.subjectEchosoundingdeu
dc.subjectSchooldeu
dc.subjectDepth distributiondeu
dc.subjectPelagic zonedeu
dc.subjectLake Constancedeu
dc.subject.ddc570deu
dc.titleHydroacoustic observations of surface shoaling behaviour of young-of-the-year perch Perca fluviatilis (Linnaeus, 1758) with a towed upward-facing transducereng
dc.typeJOURNAL_ARTICLEdeu
dspace.entity.typePublication
kops.citation.bibtex
@article{Probst2009Hydro-7919,
  year={2009},
  doi={10.1016/j.fishres.2008.10.009},
  title={Hydroacoustic observations of surface shoaling behaviour of young-of-the-year perch Perca fluviatilis (Linnaeus, 1758) with a towed upward-facing transducer},
  number={2-3},
  volume={96},
  issn={0165-7836},
  journal={Fisheries Research},
  pages={133--138},
  author={Probst, Wolfgang Nikolaus and Thomas, Gregor and Eckmann, Reiner}
}
kops.citation.iso690PROBST, Wolfgang Nikolaus, Gregor THOMAS, Reiner ECKMANN, 2009. Hydroacoustic observations of surface shoaling behaviour of young-of-the-year perch Perca fluviatilis (Linnaeus, 1758) with a towed upward-facing transducer. In: Fisheries Research. 2009, 96(2-3), pp. 133-138. ISSN 0165-7836. Available under: doi: 10.1016/j.fishres.2008.10.009deu
kops.citation.iso690PROBST, Wolfgang Nikolaus, Gregor THOMAS, Reiner ECKMANN, 2009. Hydroacoustic observations of surface shoaling behaviour of young-of-the-year perch Perca fluviatilis (Linnaeus, 1758) with a towed upward-facing transducer. In: Fisheries Research. 2009, 96(2-3), pp. 133-138. ISSN 0165-7836. Available under: doi: 10.1016/j.fishres.2008.10.009eng
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