Sea/Ocean |
North Sea |
Ports |
Port of departure : Boulogne (France)
Port of return : Boulogne (France)
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Project |
INTERNATIONAL BOTTOM TRAWL SURVEY (IBTS) - FRANCE,INFORMATION SYSTEMS, ECONOMY, DIAGNOSIS OF RESOURCES |
Scientific Authority |
CENTRE MANCHE-MER DU NORD IFREMER Centre de Boulogne sur Mer 150 quai Gambetta 62321 BOULOGNE-SUR-MER CEDEX +33 (0)3 21.99.56.00 https://www.ifremer.fr/fr/implantations/l-ifremer-en-manche-mer-du-nord |
Participating bodie(s) |
IFREMER de Boulogne, Port en Bessin, Nantes et Brest. Université de Lille, Calais, Boulogne, Liege et Le Havre. |
Discipline(s) |
- PHYSICAL OCEANOGRAPHY
- BIOLOGICAL OCEANOGRAPHY
- FISHERIES
- CHEMICAL OCEANOGRAPHY
- MARINE GEOSCIENCES
Code |
Label |
Quantity |
PI |
B13 |
Eggs & larvae Sampling of herring and sprat larvae: sorting and measurements. |
37 |
VERIN Yves |
B19 |
Demersal fish Sampling of commercial species: weighing, sorting, measurements |
97 specimens |
VERIN Yves |
B90 |
Other biological/fisheries meas. Age determination for the main commercial species |
97 specimens |
VERIN Yves |
G73 |
Single-beam echosounding Continuous |
- |
VERIN Yves |
H10 |
CTD stations Temperature and salinity |
65 stations |
VERIN Yves |
H71 |
Surface measurements underway (T,S) Thermosalinometer |
- |
VERIN Yves |
M06 |
Routine standard measurements Wind and weather |
- |
VERIN Yves |
P90 |
Other contaminant measurements Biological effects of contaminants |
97 measurements |
VERIN Yves |
|
Summary of measurements |
- -94 standardized bottom trawl hauls, lasting 30 minutes with the GOV 36/47 high opening trawl.
-25 bottom trawls on a micro-zone. -Determination, weighing and measurements of all fish species caught. -Determination of the sex and sexual maturity, otolith samples taken for the main commercial species (cod, whiting, haddock, bib, sprat, herring and plaice). -With each trawl haul: the effects of pollution were observed. Samples were taken on 62 flounder distributed over 19 stations, 113 adult dab and 23 plaice. -100 live cod were caught for the RA laboratory in Brest. Invertebrates were also caught (Nausicaa national marine centre). -39 stations for night-time larva catches using an MIK net to calculate the larval abundance of herring and sprat. -82 vertical temperature and salinity profiles. -Echo-integration on a micro-zone: 25 legs before and after each trawl haul to compare the abundance indices.
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Location map |
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Positionning system |
Geodetic system : WORLD GEODETIC SYSTEM 1984 = WGS84
Positioning system : GPS différentiel
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