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Field work with Nature Live

2 Posts tagged with the ocean_hole tag
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Today we invited the local school children to SWIMS (Spanish Wells Institute of Marine Science, remember!) to have a look at what we have been up to. They really enjoyed sieving for worms in the sand but I think they thought we were all crazy for wearing summer clothes in March!

 

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Above: Diva and Leigh leading a sieving workshop on the beach

 

While we were sieving with the pupils we came across a tiger shark tooth. Yet more evidence that they are abundant in these waters ... but we still haven’t managed to actually see one on this field trip!

 

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Above: More evidence of sharks - but still no sighting

 

After the schools children left the team got back to work looking at samples under the microscopes. The big question on everyone’s lips was whether the goat skull we found yesterday had any Osedax on it.

 

The scientists spent a long time studying the skull and debating the findings. They can see tubes on the skull that belong to a worm but that doesn’t necessarily have to be Osedax.

 

Adrian is not convinced that it’s Osedax at all. He believes they may have found another polychaete worm from the family Terebellidae.

 

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Above: Terebellidae found on the goat skull

 

However, if it is Terebellidae then it shouldn’t be living on a goat skull. Usually they live in limestone crevices but the goat skull may be close enough for it to call home. Basically you can see how sometimes discoveries can create more questions than answers! I don’t think we are going to get a conclusive answer before we get back to the Museum.

 

We only have one day left here in the Bahamas but here are some of the great pieces of footage that REX has shot over the last week.

This is the moment that REX went over the Grand Bahaman Canyon that goes down to 3,000m …

 

 

For me, some of the most amazing footage we have seen was when REX went through the purple bacteria in Ocean Hole. Also, look out for when REX meets the goat skull…

 

 

Tonight is our last night in the Bahamas. We’re saying goodbye in an appropriate manner – a drink on the beach at sunset!

 

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Above: Our last sunset in the Bahamas

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Today we had an early start to begin the 200 mile round-trip to Ocean Hole on south Eleuthera.

 

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The inland lake called Ocean Hole

(Click images to see them full size)

 

Ocean Hole is an inland lake, a mile from the oceans, that rises and ebbs with the tides. When we arrived we attracted a large gathering from a local school and Nick spoke to them about what we were doing with REX and why.

 

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Above: Nick doing some educational outreach

 

Amongst the crowds that had gathered was Ronald Horton, who is the administrator of Ocean Hole, and I asked him his thoughts…

 

 

 

 

REX went in and immediately descended to 40m. He didn't see any mermaids but when it was looking at the rubbish littering the floor of Ocean Hole it stumbled upon a goat skull.

 

REX carefully brought the skull up to the surface and, although it’s not a whale bone, everyone was excited at the idea that Osedax maybe be living on the bones, albeit in the most unlikely of places. It would have definitely made up for the earlier setbacks with the sharks!

 

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Above: Helena inspecting the goat skull

 

The team will now spend the best part of tomorrow trying to determine whether the worms found on the goat skull are Osedax. I’ll keep you posted!

 

When REX went in for a second time he descended to 38m. As he ventured down he saw this amazing purple glowing layer. From where we were sitting in the control room it looked very similar to the aurora. We nicknamed it the purple haze but what it is actually a type of bacteria.

 

None of the team had ever seen anything like this before. We didn't record any difference in temperature as REX descended so Adrian thinks that this purple haze may indicate the point when freshwater and sea water meet. Either way, the bacteria looked amazing on film…

 

 

 

 

Tomorrow we’re going to be analysing the goat skull under the microscope to see if we can find any evidence of Osedax. If the worm is on the goat skull it wouldn’t have been how we expected to find it, but every cloud…