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Invasive species on drilling rig

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  • Bob Conrich
    From Radio Saint FM, St. Helena Since the Tug Zouros Hellas departed Tristan on Saturday the 29th July without being able to remove the rig, the Tristanians
    Message 1 of 1 , Sep 29, 2006
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      From Radio Saint FM, St. Helena


      Since the Tug Zouros Hellas departed Tristan on Saturday the 29th July without being able to remove the rig, the
      Tristanians have been waiting anxiously to see what was to become of it.

      Arriving on the South African research ship SA Agulhas were Marine Biologist/Photographer Sue Scott from Scotland and
      Geoff Fridjhon from South Africa to do an Environmental Assessment. However due to bad weather conditions they have not
      been able to do much surveying at the rig because of heavy swells breaking in the harbour and around the island.

      Conditions have been marginal for diving at the rig, with a viority [variety?] of swell and poor visibility. Since the
      tug departed the island the rig has tilted slightly to seaward, which wasn’t obvious when they departed.

      Two dives have taken place and the outcome was, there appeared to be more growing on the legs than originally thought,
      the legs were coated with large quantities of dead coral, barnacle and oyster shells, while the horizontal sections had
      less coral but more oyster and other bivalve shells, a few small hard corals, a few large mussels, large dark red
      anemones etc, some which at depth were alive, and are non-native to Tristan.
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