Shrimp fishing
Get your nets ready to go shrimp fishing at the Snake Pit hydrothermal vent!
Today, it's Marie-Anne's turn to go down in the Nautile with Franck (pilot) and Yannis (co-pilot) to observe and sample live shrimp at black smoker sites at the Snake Pit hydrothermal field. These sites are well known and the biology teams have already visited these areas several times (BICOSE and BICOSE2, HERMINE). They consequently follow the evolution of populations and observe their behaviour according to the time of year of each visit.
One of the first tasks of the day was to collect the shrimp, Rimicaris exoculata, with the FISH sampler which was then brought back up to the surface by means of an elevator lowered into area near the work site.
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Marie-Anne's work on the seabed was not however over, as fluid samples, chemical measurements and temperature measurements of the smokers were to be made on the different habitats. Back onboard, these data will provide more than enough work for the fluid geochemistry team. The aim is to understand the habitat of these shrimps at different moments of their lives (juveniles- red shrimps or adults- white shrimps with their 'cheeks' coloured by their symbiotic bacteria).
Not be outdone, the rock team recovered two samples of atacamite.