Article in press sur Science Direct: Publication de Sven Gastauer

Sven Gastauer vient de publier son premier article  sur  la base de données en ligne ScienceDirect de l’éditeur néerlandais Elsevier

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Target strength and vertical distribution of smelt (Osmerus eperlanus) in the Ijsselmeer based on stationary 200 kHz echosounder recordings

Original Research Article Fisheries Research, In Press, Corrected Proof, Available online 19 September 2013
Sven Gastauer, Sascha M.M. Fässler, Bram Couperus, Ada Marieke Keller

 

article

 

G Model
FISH-3699; No. of Pages 6
Fisheries Research xxx (2013) xxx– xxx
Contents lists available at ScienceDirect
Fisheries Research

journal  homepage:   www.elsevier.com/locate/fishres

Target strength and vertical distribution of smelt (Osmerus eperlanus) in the Ijsselmeer based on stationary 200 kHz echosounder recordings

Sven Gastauer∗, Sascha M.M. Fässler, Bram Couperus, Ada Marieke Keller

Institute for Marine Resources & Ecosystem Studies (IMARES), Postbus 68, 1970 AB Ijmuiden, The Netherlands

Copyright © 2013 Published by Elsevier B.V. All rights reserved.

1-s2.0-S0165783613002087-gr1.smla r t i c l e i n f o

 

Preview :

Abstract

Ventral target strength (TS) of smelt (Osmerus eperlanus) was measured using a bottom deployed Simrad EK60 200 kHz echosounder in the shallow lake Ijsselmeer (The Netherlands). Ventral TS values recorded (TS = 20 log10(L)–74.39) were lower but comparable to previous studies looking at the dorsal TS in other areas. Biological samples were collected simultaneously close to the bottom and close to the surface. The combination of acoustic measurements and catch information revealed a diurnal migration of smelt. Smelt was observed to be more dispersed during the night than during daytime, but showing no clear avoidance pattern for any environmental variable recorded by CTD measurements. Smelt was found in the upper water column during times of highest light intensity. Such behaviour is likely to occur due to a combination of turbid water conditions and predator avoidance, mainly of piscivorous fish species such as pike–perch (Stizostedion luciperca) and perch (Perca fluviatilis)

Article Outline

 

L’article complet est disponible au prix de $ 35,95  sur http://www.sciencedirect.com 

 

Copyright © 2013 Elsevier B.V. All rights reserved. ScienceDirect® is a registered trademark of Elsevier B.V.

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