Thalassa CGFS2022
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | Thalassa (35HT) |
| Cruise identifier | CGFS2022 |
| Cruise period | 2022-09-16 — 2022-10-16 |
| Status | Completed |
| Port of departure | Brest, France |
| Port of return | Boulogne, France |
| Purpose | Research |
| Objectives | The CGFS 2022 was conducted on the N/O Thalassa from September 16 to 29 for the western part and from October 01 to 16 for the eastern part. Authorization to work in British waters was granted at the beginning of the survey, with the restriction not to work within 6 nautical miles of British waters. This access restriction affects 5 trawling stations, which are crucial for the indices of plaice (Pleuronectes platessa), whiting (Merlangius merlangus), sea bass (Dicentrachus labrax), sole (Solea solea), and thornback ray (Raja clavata), as these stations are located in coastal nursery areas.
During the CGFS 2022, 52 trawl stations were carried out in the Western Channel, of which 2 were invalid due to damage. Furthermore, 9 additional trawls with the addition of a scraper were tested to evaluate the differences in catch compared to the standard trawl. In the Eastern Channel, we validated 68 trawl stations out of the 74 planned. Five stations were located within 6 nautical miles of British waters, and one station could not be carried out due to the construction of a wind farm off Fécamp. Throughout the survey, we only experienced three days of bad weather, which led to the cancellation of some plankton and microplastic net sampling. Otherwise, the mild weather conditions enabled us to carry out all the work under favorable conditions. |
| 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) |
| Cruise report |  (2.96 MB) |
| Ocean/sea areas | |
| General | English Channel |
