"Bull sharks have been in the Brisbane River since before European settlement, they're a natural part of the Brisbane River." University of Queensland professor in zoology Craig Franklin says despite up to a thousand bull sharks living in the river winding its way through the state capital, much of their behaviour is a mystery. Cr Paul Tully, who represents Goodna and suburbs along the Brisbane River, is intrigued by the National Geographic story. The Brisbane River (some indigenous people name it Maiwar ) is the longest river in South-East Queensland, Australia, and flows through the city of Brisbane, before emptying into Moreton Bay on the Coral Sea. "It's not just the Brisbane River, but also the Logan River; all tributaries that run off the east coast of Queensland and northern New South Wales are loaded with bull sharks," local expert Paul Burt said. "Dusk and dawn is when these sharks feed and hunt all the way up the river to Moggill Ferry. The river is a tidal estuary and the water is brackishfro… One was reportedly seen swimming the flooded streets of Brisbane, Queensland, Australia, during the 2010-11 Queensland floods.
Mr Johnson says bull sharks, also known as river whalers, have been reported hundreds of kilometres upstream in the Kimberleys and 3700km upstream in the Amazon River.
The penal colony of Moreton Bay later adopted the same name, eventually becoming the present city of Brisbane. Queensland Museum ichthyologist Jeff Johnson said bull sharks were a common resident of the Brisbane River but population estimates varied wildly. Particularly confounding is the sight of the sharks getting air time during warmer months. John Oxley, the first European to explore the river, named it after the Governor of New South Wales, Sir Thomas Brisbane in 1823. "Research done in the river about a decade ago put an estimate on the number of bull sharks in the river between 1,000 and 3,000," he said. Troy Marien with a bull shark caught at night near the William Jolly Bridge (Supplied: Rob) Posted 21 Jan Bull sharks give birth to live pups and are found throughout the Brisbane and Bremer rivers. In 2008, a 2.9m bull shark was caught at the Brisbane River mouth by a trophy hunter. "The bull sharks are permanently in the upper and lower reaches of the Brisbane River," he said. Bull sharks have been founds thousands of miles up the Amazon River according to the article quoted above. Populations of bull sharks are also found in several major rivers, with more than 500 bull sharks thought to be living in the Brisbane River. Bull sharks' behaviour baffles scientists.
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