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Byron Shire
April 20, 2024

How to spot sharks before they spot you

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Save Wallum now

The Save Wallum campaign has been ongoing and a strong presence of concerned conservationists are on site at Brunswick...

Other News

Where the children can play: Lismore’s new Lego café

Walking through Lismore’s elegant Starcourt Arcade, a new burst of colour appears in one of its little shops, instantly prompting two children to squeal in delight: ‘Legoooooo!’.

Man saved by Marine Rescue NSW after vessel capsized on Bruns Bar

A rapid response by Marine Rescue Brunswick volunteers has saved a man’s life after his 4.9 metre boat rolled on Brunswick Bar this morning.

Byron U/18 girls basketballers undefeated in regional competition

The Byron Bay Beez girls U/18 squad are undefeated and sit on top of the North Eastern Junior League (NEJL) after two of four rounds.

WATER Northern Rivers says Rous County Council is wrong

WATER Northern Rivers Alliance says despite decades of objection, Rous County Council have just commissioned yet another heritage and biodiversity study in the Rocky Creek valley, between Dunoon and The Channon, in the heart of the Northern Rivers.

Alternate facts?

According to David Shoebridge of the Greens in a recent sitting in the senate, the UN has named Australia...

Reef snapshot details widespread coral bleaching on the Great Barrier Reef

Latest CSIRO research shows that the fifth major bleaching event since 2016 is still unfolding, but bleaching was just one of the disturbances on the reef over summer.

Recently on television there was a series of programs on preventing attacks on humans by predators. The three animals featured were crocodiles, polar bears and great white sharks. None of the solutions in relation to great white sharks seemed to be very effective and it occurred to me that it might be possible to use radar as a shark protection device.

One of the reasons fish stocks are so depleted in the ocean is that trawlers use radar to locate schools of fish in order to net them more effectively. If a radar device were attached to a buoy out to sea it could be connected to a computer programmed to recognise large fish which could automatically activate a siren or some other warning device without the need for human intervention. Because dolphins and sharks move differently – dolphins undulate, sharks glide – it should also be possible to create a program that could distinguish between sharks and cetaceans.

Drones have been suggested as a possible solution. The limitation of drones is that they would need to travel along a beach and if a shark happened to be in deep water at the time it passed over it may not be spotted.

The advantage of radar attached to a buoy is that it would be permanent and have a much greater reach than a visual system and it would still operate in murky waters. A similar system could be used for both sharks and crocodiles in the far north.

David Gilet, Byron Bay

 

 


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