"After four shark attacks in New South Wales in less than 48 hours, authorities on Tuesday urged beachgoers just go to a local pool instead. Sydneysiders have heard similar warnings before in the past, they've been issued for beaches polluted with faecal matter after heavy rains. The city's unique, outdated sewage management system has been linked to debris balls which have been washing up with increased frequency on Sydney beaches, including again last week at Malabar."
"The shark attacks happened on the 18, 19 and 20 of January at Vaucluse, Dee Why and Manly in Sydney, and on the mid-north coast. The NSW minister for primary industries and regional development, Tara Moriarty, has described this month's shark attacks as unprecedented. Dr Amy Smoothey at the NSW Department of Primary Industries and Regional Development analysed images of the bites from the recent attacks, and concluded bull sharks were probably involved."
Four shark attacks occurred in New South Wales within 48 hours on 18–20 January at Vaucluse, Dee Why, Manly and the mid-north coast. Authorities advised beachgoers to use local pools. Analysis of bite images indicated bull sharks were probably involved; bull sharks prefer water above 19C and peak in Sydney in January–February. Heavy weekend rainfall produced murky, brackish outflows from estuaries and flushed debris onto beaches. Sydney’s outdated sewage management has been associated with debris balls washing up. Increased nutrients and turbidity can attract plankton, then fish, and consequently sharks, while more people in the water and ocean warming raised exposure risk.
Read at www.theguardian.com
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