Another tagged New Zealand great white shark has migrated to the Great Barrier Reef off Australia – 1 of nine sharks to be satellite tagged this year.
The 3.5 metre shark, nicknamed ‘Thomas,’ was tagged with a popup archival satellite tag. The tag records information on light levels (from which approximate daily latitude and longitude can be estimated) as well as water depth and temperature so that the shark’s movements can be tracked.
After a predetermined time (six months for this shark) the tag pops off the shark, floats to the surface and transmits the data to a satellite that emails the information back.
‘Thomas’ was tagged by Department of Conservation (DOC) scientist, Clinton Duffy, off Ruapuke Island in Foveaux Strait, in February. The satellite tag popped up at Swain Reefs, off Rockhampton, late in August.
"This is only 100 kilometres from where another tag popped up last year from a shark tagged at Stewart Island after having travelled over 3000 kilometres," says Mr Duffy.