Imagine a beach where the threat of shark encounters is minimized without harming marine life. This is the promise of shark-spotting drones, which are set to become a regular sight on Queensland's beaches.
A groundbreaking study has revealed that drones are twice as effective as nets in detecting sharks. In a four-year trial across 10 beaches, drones spotted 676 sharks, including 190 larger than 2 meters, compared to only 284 and 133, respectively, caught in adjacent nets. But here's the catch: despite this evidence, Queensland's Department of Primary Industries insists on maintaining traditional measures like nets and drum lines, known to have fatal consequences for dolphins, whales, turtles, and dugongs.
Drones, according to Rob Adsett, chief remote pilot at Surf Life Saving Queensland, offer a comprehensive view of beach activities. They assist in data collection, shark risk management, and search and rescue operations. The ability to track sharks in real-time allows lifeguards to make informed decisions without overreacting. This is a significant improvement from the past, when a shark sighting could lead to an hour-long beach closure, only to find out it was a false alarm.
The Queensland government report highlights the multi-faceted benefits of drones. When a large shark is detected, swimmers can be evacuated, and drones can assist in rescuing those caught in rip currents or searching for missing persons. Moreover, drones have a significantly lower environmental impact, with only 123 non-target animals caught during the trial, compared to the nets' bycatch of 13 dolphins, 8 whales, 45 turtles, 2 dugongs, and numerous protected fish species, half of which were already dead upon retrieval.
Controversially, the Crisafulli government has decided to expand the use of shark nets, despite recent incidents of whales becoming entangled. This decision has sparked debate, with some experts advocating for 'smart drum lines' that catch, tag, and release animals instead of lethal nets.
Professor Robert Harcourt, a marine ecologist, confirms the effectiveness of drones in clear waters with sandy beaches. He suggests that while drones cannot prevent sharks from entering, they enable lifeguards to clear the water promptly, ensuring everyone's safety. But is this approach enough?
The debate continues as the Department of Primary Industries plans to expand drone operations to 20 beaches by 2029. While acknowledging the benefits, they maintain that drones cannot yet replace traditional gear. This stance is supported by Australian research, which found no significant difference in shark interactions at netted and non-netted beaches since the 2000s.
As Queensland embraces drone technology, the question remains: can we strike a balance between beach safety and marine life protection? Share your thoughts in the comments below.
