Thalassa EVHOE2015
Cruise plan
| Cruise Info. | |
| Ship name (ship code) | Thalassa (35HT) |
| Cruise identifier | EVHOE2015 |
| Cruise period | 2015-10-17 — 2015-12-01 |
| Status | Completed |
| Port of departure | Brest, France |
| Port of return | Brest, France |
| Purpose | Research |
| Objectives | French Bottom Trawl Surveys in Bay of Biscay and Celtic Sea.
Objectives - obtain abundance indices per age group and annual recruitment estimates for the sampled species - build a reliable time series of those indices - follow the evolution of the demographic structures of the main exploited fish populations - map the spatio-temporal distribution of the fisheries resources per age group Methodology The GOV 36/47 bottom trawl is used with a 20 mm mesh codend liner. The trawl is deployed with plane oval trawl boards of 1300 kg and with 10-20 cm rubber discs on the footrope. The haul duration is 30 minutes and the towing speed 4 knots. Trawling is carried out during day time only. In the Bay of Biscay (ICES division VIII) and in the Celtic Sea (ICES division VII), a stratified sampling scheme is used. The area is divided according to latitude into 5 blocks and the hauls were distributed in seven depth zones (15-30, 31-80, 81-120, 121-160, 161-200, 201-400, 401-600 m). 160 stations will be occupied. Catch weight and catch numbers are recorded for all species, only selected finfish and shellfish are measured. |
| Chief scientist | Michele Salaun (IFREMER, Lorient Station) |
| NPRC |  (1.51 MB) |
| Ocean/sea areas | |
| General | Celtic Sea Bay of Biscay |
| Specific | ICES areas VII e-j; VIII a-d |
