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Land-based receivers can significantly increase data recovery and are able to detect signals in a range of 80-90 km. However, since Argos satellite availability averages only 6-12 minutes per hour in Hawaiʻi, land-based receivers were installed at high elevations around Maui and Oʻahu to augment the satellite array and increase data throughput from fin-mounted tags. In the past, data from tagged sharks were solely transmitted through the orbiting satellites system whenever the animal surfaced. This is the first example of using “sharks as oceanographers.” Data will be made available in near-real time to databases that inform models to predict ocean circulation patterns (e.g., to improve weather forecasting). The tags are also capable of acquiring GPS–quality positional “fixes” associated with these profiles. In addition to the sharks’ locations, this new generation of tags records important oceanographic data, such as ocean temperature and oxygen profiles, and sea surface temperature. Second, the project is testing two new technologies a new type of satellite tag and a new way of detecting transmissions from those tags.Ī tiger shark in the Hawaiian Islands with the latest generation of satellite tags. First, the Shark Research Group from the Hawaiʻi Institute of Marine Biology expects to gain valuable insights about shark behavior and habitat selection. Note that the accuracy of these “fixes” varies from within several yards to up to a mile from the shark’s actual location. The square pink symbol indicates the original tagging location and the bright yellow dot shows the last reported detection. Placing your cursor over a location spot gives you the date and time of the event.
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Pick a shark from the slider to watch tracks from recently tagged sharks. These tags are attached to the shark’s dorsal fin and send a signal every time the fin breaks the surface. This map shows the movements of Hawaiʻi tiger sharks fitted with the latest generation of satellite tags. Tagged Tiger Sharks to Collect Behavioral and Oceanographic Data 2016 – present 15 encounter took place off Oahu's North Shore and also involved tiger sharks feeding on a whale carcass, according to local media reports.DISCLAIMER: This is not a warning system and does not provide real-time monitoring. In video later shared widely on social media, the gargantuan creature swam up to the crew's dive cage and poked around curiously before disappearing back into the blue.Īround the same time that Gray, Mohler, Jeffries and their colleagues spotted Deep Blue earlier this year, a separate group also spotted what appeared to be the same shark off the Hawaiian coast. The massive shark swam into the internet spotlight several years ago when a film crew spotted her during a Shark Week shoot off Mexico's Guadalupe Island. It's not the first time Deep Blue has been caught on camera. Jeffries told National Geographic that wind and water conditions were perfect for shooting crystal-clear footage of the sharks. In total, the crew spent three days observing Deep Blue and other mature female great whites who dropped by to feed on the whale carcass. "We had shots and video and it was more than enough to present to at least the scientific community for identification," Jeffries explained, adding that authorities agreed that the massive shark pictured was likely Deep Blue.
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It's thought that she could be more than 50 years old.īased on the appearance of the shark's stomach, the crew also posited she could be pregnant - though the sumptuous sperm whale feast could also be responsible for her enlarged stomach. "I was thinking, 'What in the world is this?' Because it was way bigger than any shark I'd expect," Gray said of the encounter.ĭeep Blue is estimated to measure a staggering 20 feet long and is likely still growing by several millimeters each year. The underwater footage shot by photographer Mark Mohler showed marine biologist Andrew Gray and fellow photographer Kimberly Jeffries swimming just feet from Deep Blue, cameras in hand as they captured rare footage of the creature. Footage from that January encounter is featured in the National Geographic SharkFest special "World's Biggest Great White?" on Sunday, July 21, at 8 p.m. New footage has emerged showing what appears to be Deep Blue, one of the largest great white sharks ever caught on camera, feasting on a whale carcass off the coast of Hawaii earlier this year.Ī group of Hawaii-based scientists and biologists filmed a shark matching Deep Blue's description several miles off the coast of Waikiki.