SONARMONT 1

Type Oceanographic cruise
Ship Thalia
Ship owner Ifremer
Dates 17/05/2003 - 22/05/2003
Chief scientist(s) BLANCHARD Michel

DYNECO-LEBCO LABORATOIRE D'ÉCOLOGIE BENTHIQUE CÔTIÈRE

IFREMER Centre de Bretagne

ZI Pointe du diable

CS 10070

29280 PLOUZANE

+33 (0)2 98 22 49 19

Philippe.Cugier@ifremer.fr

https://dyneco.ifremer.fr/Qui-sommes-nous/Ecologie-benthique-cotiere-LEBCO

DOI 10.17600/3070120
Objective Mapping and assessment of the Crepidula fornicata population in the south-Chausey area. This marine gastropod was introduced into France some fifty years ago and has proliferated in various areas along the coast. Amongst the most affected sectors, the entire bay of Mont Saint-Michel is certainly where its density is highest. A recent assessment (Blanchard and Ehrhold, 1999) gave a stock of about 150,000 tons over the entire bay. This zone is currently being studied in a multidisciplinary framework of the PNEC (national coastal ecology program) to understand and assess the circulation of nutrient fluxes and model them. To this end, it is important to know the stock present for the main species in the sector. This is done by this cruise with an updating of the species, using acoustics and submarine video techniques followed by quantitative samples for stock assessment. Sonarmont1 covers two sectors, of about 30 km2 each: one along the Cotentin peninsula, the other in the center of the bay. A complementary cruise called Sonarmont2 covered the shallow area at the back of the bay.

Data managed by SISMER

Bibliography

References of Technical Reports

Le Mao Patrick (2007). Le chantier PNEC de la Baie du Mont-Saint-Michel : 5 ans d’études et de recherche pour une meilleure gestion environnementale d’un site emblématique. DOPLER/LERFBN. https://archimer.ifremer.fr/doc/00156/26694/


Giacomini Elodie (2007). Stratégie de mise en place d'un SIG marin en baie du Mont Saint-Michel. RST.DYNECO/AG/07-09/EG - Rapport de stage de Licence Universitaire Professionnelle SIG (Université de La Rochelle). https://archimer.ifremer.fr/doc/00432/54386/


Blanchard Michel, Clabaut Philippe, Abernot-Le Gac Chantal (2006). Cartographie et évaluation du stock de crépidules en baie du Mont Saint-Michel, en 2004. DYNECO/EB/06-01. https://archimer.ifremer.fr/doc/00000/5901/