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Colonization of Sulfurovum sp. on the gill surfaces of Alvinocaris longirostris , a deep‐sea hydrothermal vent shrimp
Author(s) -
Tokuda Gaku,
Yamada Akinori,
Nakano Kazuma,
Arita Nao O.,
Yamasaki Hideo
Publication year - 2008
Publication title -
marine ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.668
H-Index - 58
eISSN - 1439-0485
pISSN - 0173-9565
DOI - 10.1111/j.1439-0485.2007.00211.x
Subject(s) - hydrothermal vent , biology , gill , chemosynthesis , shrimp , proteobacteria , zoology , invertebrate , crustacean , ecology , 16s ribosomal rna , bacteria , fishery , hydrothermal circulation , paleontology , fish <actinopterygii>
Deep‐sea hydrothermal vents are unique light‐independent ecosystems that are sustained by chemosynthetic bacteria. For many of the invertebrates inhabiting in such environments, bacteria play essential roles in both energy acquisition and detoxification of potentially toxic gases such as H 2 S. In this study, the bacterial flora present on the gills of Alvinocaris longirostris (Bresiliidae: Caridea), a shrimp inhabiting hydrothermal vents (1532 m depth) at the Hatoma Knoll of the Okinawa Trough, was investigated. Bacterial 16S rDNA fragments were successfully amplified from the gills and 70% of these fragments showed an identical pattern in the restriction fragment length polymorphism analysis. These fragments were assigned to the ribotype AL‐1. Phylogenetic analyses suggest that AL‐1 forms a monophyletic clade with Sulfurovum spp. (ε‐Proteobacteria). Fluorescence in situ hybridization for AL‐1 and electron microscopy showed the presence of short‐rod bacteria lining up on the cuticular layer of the surface of the gill filaments. These results suggest that bacterial association with gills also occurs in bresiliid shrimps.