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Guillard J., Lebourges Dhaussy Anne, Brehmer Patrice. (2004). Simultaneous Sv and TS measurements on Young-of-the-Year (YOY) freshwater fish using three frequencies. ICES Journal of Marine Science, 61 (2), p. 267-273. ISSN 1054-3139.

Titre du document
Simultaneous Sv and TS measurements on Young-of-the-Year (YOY) freshwater fish using three frequencies
Année de publication
2004
Type de document
Article référencé dans le Web of Science WOS:000220422300011
Auteurs
Guillard J., Lebourges Dhaussy Anne, Brehmer Patrice
Source
ICES Journal of Marine Science, 2004, 61 (2), p. 267-273 ISSN 1054-3139
In autumn, the fish population above the thermocline in Lake Annecy mainly comprises young perch (Perca fluviatilis) of the year. The fish are distributed in schools during the day and as scattered individual fish targets at night. Measurements of volume-backscattering strength and target strengths (TS) were carried out in a synchronous way using three echosounders operating at three frequencies (70, 120, and 129 kHz), with different characteristics (split beam, dual beam, beam shape, pulse length, etc.). Target-strength values show variability from one elementary sampling unit to another and from one device to another, but the mean global TS values are similar, independently of the frequency. The volume-backscattering strengths measured on precise schools by the three acoustic devices give significantly similar results. Acoustic measurements on YOY perch are completely independent of the frequency and the characteristics of the echosounders.
Plan de classement
Stocks [040PECHE03]
Descripteurs
POISSON D'EAU DOUCE ; ESTIMATION DE STOCK ; PROSPECTION ACOUSTIQUE ; SONAR ; DISTRIBUTION SPATIALE ; VARIATION JOURNALIERE ; METHODE D'ANALYSE ; ETUDE COMPARATIVE
Description Géographique
FRANCE
Localisation
Fonds IRD [F B010033843] ; Montpellier (Centre IRD)
Identifiant IRD
fdi:010033843
Contact