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

Probst, Wolfgang Nikolaus; Thomas, Gregor; Eckmann, Reiner

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

Dateien

2009_Probst_etal_Hydroacoustic_observations_of_surface.pdfGröße: 905.7 KBDownloads: 689

Datum

2009

Autor:innen

Probst, Wolfgang Nikolaus

Thomas, Gregor

Eckmann, Reiner

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Fisheries Research. 2009, 96(2-3), pp. 133-138. ISSN 0165-7836. Available under: doi: 10.1016/j.fishres.2008.10.009

Zusammenfassung

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.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

Echosounding, School, Depth distribution, Pelagic zone, Lake Constance

Zitieren

ISO 690

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. 2009, 96(2-3), pp. 133-138. ISSN 0165-7836. Available under: doi: 10.1016/j.fishres.2008.10.009

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}
}

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