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

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

Type of Publication: Journal article
URI (citable link): http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-74095
Author: Probst, Wolfgang Nikolaus; Thomas, Gregor; Eckmann, Reiner
Year of publication: 2009
Published in: Fisheries Research ; 96 (2009), 2-3. - pp. 133-138. - ISSN 0165-7836
DOI (citable link): https://dx.doi.org/10.1016/j.fishres.2008.10.009
Summary:
The 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.
Subject (DDC): 570 Biosciences, Biology
Keywords: Echosounding, School, Depth distribution, Pelagic zone, Lake Constance
Link to License: Attribution-NonCommercial-NoDerivs 2.0 Generic
Bibliography of Konstanz: Yes

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PROBST, 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. 96(2-3), pp. 133-138. ISSN 0165-7836. Available under: doi: 10.1016/j.fishres.2008.10.009

@article{Probst2009Hydro-7919, title={Hydroacoustic observations of surface shoaling behaviour of young-of-the-year perch Perca fluviatilis (Linnaeus, 1758) with a towed upward-facing transducer}, year={2009}, doi={10.1016/j.fishres.2008.10.009}, number={2-3}, volume={96}, issn={0165-7836}, journal={Fisheries Research}, pages={133--138}, author={Probst, Wolfgang Nikolaus and Thomas, Gregor and Eckmann, Reiner} }

2009 The 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.<br />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. Eckmann, Reiner Probst, Wolfgang Nikolaus Attribution-NonCommercial-NoDerivs 2.0 Generic 2011-03-24T17:38:30Z First publ. in: Fisheries Research, 96 (2009), 2-3, pp. 133-138 eng 2011-03-24T17:38:30Z Thomas, Gregor Probst, Wolfgang Nikolaus Thomas, Gregor Hydroacoustic observations of surface shoaling behaviour of young-of-the-year perch Perca fluviatilis (Linnaeus, 1758) with a towed upward-facing transducer application/pdf Eckmann, Reiner

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