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Australia closes beaches on the east coast after shark attacks

Heavy rains have muddied the waters and made them more attractive to sharks. Several beaches on Australia's east cost, including Sydney, were closed Tuesday following four shark attacks within two days.

A man who was surfing in Port Macquarie (about 400 km north of Sydney) had been bitten earlier that day. Health authorities reported that he is in stable condition in hospital.

Steven Pearce told reporters that the beaches were unsafe at this time.

"We have such poor water that is really conducive for some bull shark activity."

The closures occur during the summer months in Australia, when the beaches are usually crowded with tourists and locals.

SHARK ATTACKS

Emergency services were called on Monday night to Manly Beach in Sydney after reports that a surfer aged in his 20s was bitten by shark. Max White, an eyewitness, said that another surfer kept the man alive by using the leg rope of his board as a tourniquet.

He told ABC that "he was conscious, but not breathing. We just tried to keep him awake."

The paramedics treated him for severe leg injuries and then took him to the hospital in critical condition.

On Monday, a boy aged 10 escaped without injury after a shark bit into his surfboard. A day earlier, a boy in critical condition was bitten on a city beach.

Police have announced that all beaches along the Northern Beaches council area, which straddles Sydney's northern coast, will remain closed until further notification.

BRACKISH WTER

Bull sharks are suspected of being behind the attacks. Days of heavy rain washed in to the harbour and nearby beaches. The species thrives when exposed to brackish waters.

In a Sydney Morning Herald column, Chris Pepin-Neff wrote that sharks don't normally bite humans. However, the turbid waters reduce their visibility, which increases the chance of them bumping into something. At this point, "they bite defensively or curiously and then bite twice again", an expert in shark behavior.

He added that heavy rain increases sewage runoff and attracts bait fish, which sharks feed upon.

According to conservation groups, Australia has around 20 shark attacks each year. Of these, fewer than 3 are fatalities. The drownings that occur on Australia's beaches dwarf those numbers. (Reporting and editing by Himani Sarkar in Sydney)

(source: Reuters)