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Sulphur-isotopic composition of the deep-sea mussel Bathymodiolus marisindicus from currently active hydrothermal vents in the Indian Ocean
Yamanaka, T.; Mizota, C.; Fujiwara, Y.; Chiba, H.; Hashimoto, J.; Gamo, T.; Okudaira, T. (2003). Sulphur-isotopic composition of the deep-sea mussel Bathymodiolus marisindicus from currently active hydrothermal vents in the Indian Ocean. J. Mar. Biol. Ass. U.K. 83(4): 841-848
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Yamanaka, T.
  • Mizota, C.
  • Fujiwara, Y.
  • Chiba, H.
  • Hashimoto, J.
  • Gamo, T.
  • Okudaira, T.

Abstract
    Sulphur-isotopic composition of soft tissues from Bathymodiolus marisindicus collected from hydrothermal vents in the Indian Ocean was reported. The [delta]34S values of the soft tissues (+3[similar]+5‰ vs Cañyon Diablo troilite) were nearly identical to those from the associated hydrothermal fluid and chimney sulphides (+5 to +8‰), but were significantly different from that of the common seawater sulphate (+21‰), which suggested that the endosymbiotic bacteria used sulphide in the fluid as an energy source. Transmission electron microscopic observation of the endosymbionts also suggested that the symbiont is a thioautotroph. Bathymodiolus species, which depend on either sulphide or methane oxidation, or both, have a worldwide distribution. Bathymodiolus marisindicus from the Indian Ocean has a close relationship with congeners in the Pacific Ocean as evidenced by form of symbiosis. Biogeography and migration of the genus Bathymodiolus based on the relevant data are briefly discussed.

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