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Simon Thorrold holding a PSAT tag.

Simon Thorrold holding a PSAT tag.
Simon Thorrold holding a PSAT tag.
Simon Thorrold holding a PSAT tag.
Simon Thorrold holding a PSAT tag.
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Kleindinst, Thomas N.
Simon Thorrold holding a PSAT tag.
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07/22/2013
graphics/S_Thorrold_P-SAT_Tag/_DSC3036.jpg
The tags are attached to the sharks in this case via an intramuscular dart and short tether. The tags record temperature, depth and light levels every 3-5 seconds. The two tags that look like little boats also have a GPS unit on them that can log a GPS position when they are on the surface for a couple of minutes. Then at a predetermined time the tag releases from the shark, floats to the surface and then begins to download a summary of data to the researcher via the ARGOS satellite system.
Caption from Oceanus magazine, vol. 50, no. 2, page 36:
A conversation with WHOI scientist Simon Thorrold.
Caption from Oceanus magazine, Vol. 52, No. 1, pg. 34:
Blue sharks like these were once abundant in the open ocean, but they have been fished without catch limits. Satellite tags like the one that WHOI biologist Simon Thorrold (inset) is holding are giving scientists an unprecedented ability to follow sharks and begin to understand their habitats and behavior. That information is essential for determining management strategies to ensure that the sharks are not overfished.
Photo by Tom Kleindinst
© Woods Hole Oceanographic Institution
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