Projects:

Release Experiment

Collection of Tubeworm baby’s

 

09/05/2010 – 29/05/2010

Chief Scientist: LALLIER François (STATION BIOLOGIQUE DE ROSCOFF)

Research Vessel: L’Atalante

Submersible: Nautile

Austrian Participant:

Mario Schimak After invitation by François Lallier I attended the cruise to collect baby traps and carry out a new bacteria release experiment. Thank you for this great opportunity and my first dive to the ocean floor in a submersible!

Collection:

As part of a long running colonization study at deep-sea hydrothermal vents we collected previously deployed Tubeworm Artificial Settlement Cubes (TASC’s) and collected baby tubeworms attached to the devices. An experiment, in which the release of the endosymbiotic bacteria within the trophosome and their ability to “escape” back into the water column, was planned and conducted under pressure. Tissue samples of adult Riftia pachyptila were taken and fixed for electron microscopy work back in Vienna.

The Nautile

The French owned submersible Nautile was used to collect all samples and conduct in situ experiments.

 

Deployment of the submersible Nautile for a dive to – 2500 meters.

 

The laboratory on the L’Atalante showing the set up for the release experiment.