Species and habitats - Clupea harengus - Age 0 - Recurrence - IBTS Q3 (1991-2010)

Date(s) (Publication)
Custodian(s): CHARM Consortium
Resource provider(s): Franck Coppin
Affiliation(s) 1 : Ifremer
2 : CHARM Consortium
Abstract Species habitat occupation, observed during the third quarter IBTS from 1980 to 2010, has been expressed as rare, occasional, frequent, recurrent depending on density levels and variability over time.
Keywords Species data set, CHARM, Harreng, Herring, R├ępartition des esp├Ęces, ressource halieutique
Lineage The survey extends in the North Sea, which corresponds to ICES divisions IVb and IVc. The study area is divided into rectangles of 0.5d latitude and 1d longitude using a systematic sampling strategy. The sampling gear is a high opening bottom trawl well adapted for catching demersal species, with a 10 mm mesh size (side knot) for catching juveniles. This sampling gear is polyvalent and is well adapted to the varying seabed types encountered in the study area.Two 30 minutes hauls are performed
Utilisation research-only
Temporal Extent 1989-01-01 - 2007-12-31