ALLEGRO 07

Name: ALLEGRO 07
Start: 2007-08-31
End: 2007-09-15
Location: Bay of Biscay

Type	Oceanographic cruise
Ship	Thalassa
Ship owner	Ifremer
Dates	31/08/2007 - 15/09/2007
Chief scientist(s)	SCALABRIN Carla
	GEO-OCEAN - UMR 6538 Univ. Brest, CNRS, Ifremer, Univ. Bretagne Sud Place Nicolas Copernic 29280 Plouzané https://www.geo-ocean.fr/
DOI	10.17600/7040050
Objective	Simultaneous acquisition of acoustic signals on shipboard and AUV2 platforms (Simrad ER-60 and ME-70 echosounders). AUV2 dives depending on configurations, for M,W and X fisheries type assignments. Radiated noise from the vessel and the AUV2 was measured. Trawling was done to identify species and assess biological parameters. Measurements of the ship's own noise and the ER-60 sounders' acoustic emissions were made using SABRINA. This falls under the OBSHAL project in the SIDEPECHE, theme 4 programme.

Sea/Ocean

Bay of Biscay

(Gironde au Capbreton, Grande Vasière)

Ports

Port of departure : Brest (France)

Port of return : Brest (France)

Limits

North	South	West	East
48.4	43.6	-4.8	-1.4

Project

SIDEPECHE

Scientific Authority

GÉOSCIENCES MARINES

Centre Ifremer Bretagne

ZI Pointe du Diable

29280 Plouzané

+33(0)2 98.22.42.24

Participating bodie(s)

IFREMER et GENAVIR

Discipline(s)

TECHNOLOGY
FISHERIES
PHYSICAL OCEANOGRAPHY

Code	Label	Quantity	PI
B14	Pelagic fish Chalutages pour identification et échantillonnage des espèces	10 hauls	SCALABRIN Carla
B19	Demersal fish Chalutages pour identification et échantillonnage des espèces	7 hauls	SCALABRIN Carla
B28	Acoustic reflection on marine organ Simrad ER-60 (18, 38, 70, 120 et 200 kHz) et ME-70	-	SCALABRIN Carla
B64	Gear research AUV2,Simrad ER-60 (70 & 200 kHz),mesures de bruit (SECSI,SABRINA)	-	SCALABRIN Carla
D71	Current profiler (eg ADCP) ADCP 75 & 150 kHz selon 2 config. pour validation avec TECHSAS (7 h)	-	ABEL-MICHAUX Karine
G73	Single-beam echosounding Simrad ER-60 (18, 38, 70, 120 et 200 kHz)	-	SCALABRIN Carla
G74	Multi-beam echosounding Simrad ME-70	-	SCALABRIN Carla
H71	Surface measurements underway (T,S) 1500 milles	-	SCALABRIN Carla

Summary of measurements

-Continuous acquisition of acoustic signals from the Simrad shipboard ER-60 and ME-70.
-AUV2 dives made with the fisheries acoustics payload (Simrad ER-60 70 and 200 kHz echosounders).
-Biological samples taken by demersal, pelagic and surface pelagic trawl hauls.
-SABRINA measurements were acquired (ship's own noise and characterization of acoustic emissions from echosounders).
-ADCP measurements were acquired for configuration of TECHSAS.
-Radiated noise from ship and AUV2 was measured using SECSI.
-The vessel's echosounders were calibrated.

Location map

Positionning system

Geodetic system : WORLD GEODETIC SYSTEM 1984 = WGS84

Positioning system : GPS différentiel

Joint document(s)

Summary of mesured parameters during the cruise ALLEGRO 07

Data managed by SISMER

Bibliography

Publications

Laffargue Pascal , Delaunay Damien, Badts Vincent , Berthele Olivier, Cornou Anne Sophie, Garren Francois. Fish and cephalopods monitoring on the Bay of Biscay and Celtic Sea continental shelves. Preprint IN PRESS. Publisher's official version : https://doi.org/10.5194/essd-2021-146 , Open Access version : https://archimer.ifremer.fr/doc/00820/93153/

Trenkel Verena , Berger Laurent , Bourguignon Sebastien, Doray Mathieu , Fablet Ronan, Masse Jacques, Mazauric Valerie, Poncelet Cyrille , Quemener Gael, Scalabrin Carla , Villalobos Hector (2009). Overview of recent progress in fisheries acoustics made by Ifremer with examples from the Bay of Biscay. Aquatic Living Resources, 22(4), 433-445. Publisher's official version : https://doi.org/10.1051/alr/2009027 , Open Access version : https://archimer.ifremer.fr/doc/00000/11165/

Scalabrin Carla , Marfia Christian, Boucher Jean (2009). How much fish is hidden in the surface and bottom acoustic blind zones? Ices Journal Of Marine Science, 66(6), 1355-1363. https://doi.org/10.1093/icesjms/fsp136

References of Technical Reports

Carla SCALABRIN. ALLEGRO-07 : compte-rendu de campagne. 31 août au 15 septembre 2007 - N.R.H. Thalassa. Septembre 2007 ?STH/LTH/07-27

Carla SCALABRIN. Documentation et compte-rendu technique. Campagne ALLEGRO : septembre 2007 - N.R.H. Thalassa. Novembre 2007 ?STH/LTH/2007-38.

References of International Seminar Communications

Scalabrin, C. and C. Marfia. How much fish is hidden in surface and bottom acoustic blind zones. (2008). Oral communication presented in the SEAFACTS Symposium held in Bergen, Norway, June 2008.

References of National Seminar Communications

Scalabrin, C. ,C. Marfia and J. Boucher. How much fish is hidden in surface and bottom acoustic blind zones. (2008). Poster presented in the Ecosystem Approach to Fisheries Symposium held in Boulogne sur Mer, France, November 2008.