Journal of the Marine Biological Association of the United Kingdom

Short Communications

First Report of the Bacterium Thioploca in the Benguela Ecosystem off Namibia

V.A. Gallardoa1, E. Klingelhoeffera2, W. Arntza3 and M. Gracoa1

a1 Departamento de Oceanografía, Universidad de Concepción, Chile (e-mail:

a2 National Marine Information and Research Center, Ministry of Fisheries and Marine Resources, Swakopmund, Namibia.

a3 Alfred-Wegener-Polar-und Meeresforschung Institut, Bremerhaven, Germany

Thioploca are sulphur oxidizing-nitrate reducing gliding filamentous benthic bacteria belonging to the Beggiatoaceae. In this paper we report on the discovery of Thioploca resulting from a commercial fishery survey of Trachurus capensis (horse mackerel) and Merluccius capensis (hake) carried out off Namibia between 18°00·1′S and 25°00·8′S from 4–10 December 1996, on board the RV ‘Welwitschia’. The first positive finding of sheathed, presumably vacuolated, Thioploca in the Benguela Current ecosystem is now reported.