Whale fall cruise Montery Bay Canyon

Funding agency: The David and Lucille Packard Foundation


Osedax collections

23/5/2006 – 25/5/2006

Chief scientist: R. C. Vrijenhoek (Monterey Bay Aquarium Research Institute, USA)

Austrian participants: Sigrid Katz

Research Vessel Western Flyer

ROV Tiburon


                                               R/V Western Flyer                                                                                    ROV Tiburon

I was invited to collect specimens of Osedax from four whale-falls in the Monterey Bay Canyon between 385 m and 2,893 m depth.

Osedax collections

Osedax is a member of the family Siboglinidae, closely related to the symbiotic vestimentiferan tubeworms from deep-sea hydrothermal vents. Like Vestimentiferans they are living in symbiosis with bacteria. However, their symbionts are not chemoautrophs like in Vestimentiferans but heterotrophs. Also in contrast to Vestimentiferans Osedax house their symbionts within root-like structures penetrating into whale skeletons sunken to the seafloor. We collected 4 different species of Osedax to characterize the ultrastructure and cell kinetics of the symbiont housing organ of Osedax.

I would like to thank R. C. Vrijenhoek for his support. Special thanks to Shannon B. Johnson and William J. Jones for their help and pleasant collaboration. More information about the ROV Tiburon and the Western Flyer is provided on the MBARI website.



                                        Osedax on whale bone (by MBARI)                                                               Osedax frankpressi