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Thalassa CGFS2019
Cruise plan
Cruise Info. | |
Ship name (ship code) | Thalassa (35HT) |
Cruise identifier | CGFS2019 |
Cruise period | 2019-09-15 — 2019-10-17 |
Status | Completed |
Port of departure | Brest, France |
Port of return | Boulogne, France |
Purpose | Research |
Objectives | Since 1988, IFREMER has carried out a pluri-annual program to estimate recruitment and demography structure of the main commercial fish populations in the English Channel. These data are collected annually during the bottom trawl survey CGFS (Channel Ground Fish Survey), as part of the EU DCMAP (Data Collection Multi-Annual Programme). While the time series initially concerned the eastern part of the English Channel, the western part of this area is now included in the survey coverage. This scientific survey investigates the fish community composition and spatial distribution and collects biological information needed for stock assessments by ICES (International Council for the Exploration of the Sea) working groups. From 2015 onwards, CGFS has taken place on the R/V Thalassa, allowing a broader sampling of the ecosystem, notably physico-chemical measurements and phyto-, zoo- and ichthyoplankton samples. Benthic invertebrates, litter and jellyfish are also recorded as part as the MSFD (Marine Strategy Framework Directive) requirements. The data and samples collected during this survey are also used to determinate the relationship between environmental parameters and species abundance to identified their optimal habitats, and to determine the links between the populations inhabiting this ecosystem, in order to estimate its trophic structure and functioning. |
Chief scientist | Didier Le Roy (IFREMER, Brest) |
Project | ICES International Bottom Trawl Survey (IBTS) |
Coordinating body | International Council for the Exploration of the Sea (ICES) |
NPRC | (0.21 MB) |
Ocean/sea areas | |
General | English Channel |
Specific | English Channel from 48.30N, 6.5W to 51.0N, 2.0E |