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Quote:Australian filmmakers contracted for a marine investigation are baffled as to what could have eaten a 3m great white shark they tagged as part of the study.
A film crew tagged the 3m great white female as part of a contract to get a greater insight into the movements of the supposed apex predators of the sea.
But the tag later washed ashore only 4km from where the shark was tagged, the data revealing a story that shocked the researchers.
According to the readings from the tag, the shark took a high-speed deep dive down the side of Australia's continental shelf to a depth of 500m.
Then the shark tag recorded a large temperature change from 9 degrees to 24.5 degrees where it remained for eight days.
"The question that not only came to my mind but everyone else's mind who was involved was 'what did that?'" filmmaker Dave Riggs said.
The film-making investigators drew only one conclusion — the great white had been eaten by a "super predator" of the deep.
The hypothesis is floated in a new documentary series to be aired on the Smithsonian Channel in the US titled Hunt for a Super Predator.
Read more at http://news.ninemsn.com.au/technology/20...ERRQ3Of.99
I take it 24.5 C is somebody's body heat?

Maybe it was eaten by a human in a diving bell.
Sharks being eaten by super predators is nothing new.

https://en.wikipedia.org/wiki/Shark_fin_soup
giant squid
(06-09-2014 07:10 AM)skyblue1 Wrote: [ -> ]giant squid

Possibly. I find a colossal squid to be more likely, though.
It could have been pulled apart and eaten by a pack of orcas and the tag just sort of floated off by itself, the tag itself may never have been inside an animal and was just registering the temp of the surrounding water.

Some_Bloke

[Image: cthulhu_rise_by_lochapowa-d4lsyp8.jpg]
(06-09-2014 08:57 AM)Alison Wrote: [ -> ]It could have been pulled apart and eaten by a pack of orcas and the tag just sort of floated off by itself, the tag itself may never have been inside an animal and was just registering the temp of the surrounding water.

Is the temperature usual for that area?
(06-10-2014 02:44 PM)LanguageWolf Wrote: [ -> ]
(06-09-2014 08:57 AM)Alison Wrote: [ -> ]It could have been pulled apart and eaten by a pack of orcas and the tag just sort of floated off by itself, the tag itself may never have been inside an animal and was just registering the temp of the surrounding water.

Is the temperature usual for that area?

Depends which area we're talking about. Bearing in mind that Australia is the sixth-largest country in the world, an island continent which has a total coastline length of 35,876 km (22,292 mi) with an additional 23,859 km (14,825 mi) of island coastlines. We straddle the Pacific Ocean to the east, the Indian Ocean in the west, and the Southern Ocean in the south. I'd imagine there would be temperature variations, so I'd really have to have more information as to where it was to say if it's usual or not.
But at five hundred meters, though? If I have my conversion right, 24.5 is almost room temperature. According to this, it shouldn't have been more than 20
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