Monday , March 1 2021

Keep sharks and humans safe; The effectiveness of the drum "very debated"



shark, drumline, leah gibbs

While SMART batteries cause less damage to marine life than shark networks, a social scientist has affirmed that the question of the effectiveness of technology was maintained to protect people from ocean predators. The Department of Primary Industries of NSW has proposed a trial of the percussion lines on the beaches of Tathra, Pambula and Merimbula to begin this summer, but still have to confirm whether the operation will be carried out or not. SMART hard lines (Shark-Management-Alert-in-Real-Time) are a new technology. When a shark is captured, it activates an alarm to alert the authorities to allow them to be tagged, move 1 km to the outside and release them alive. But Dr. Leah Gibbs, a geography professor at the University of Wollongong, who has relationships with people with nature, including environmental governance, said that there was not enough research to say whether or not they were effective in preventing them the population was safe from potentially dangerous sharks. "Its effectiveness is very debated," he said. He said that authorities should examine a "cut strategy" that includes multiple types of approaches at the same time. "There is no strategy that works all the time in all places, this is important to keep in mind," he said. "But there are many different strategies that prove to be successful in different places." These include terrestrial or aerial human observation, labeling and satellite monitoring, electronic deterrents such as Shark Shields, visual deterrents as neoprene with camouflage or warning design and installation. Workers of artificial kelp forests like sharks do not like being in these forests. Exclusion barriers might be appropriate for some places, but not where surfing was great. In addition, a very new approach was to suspend a blimp on a beach to look for sharks – a project that is being developed in Kiama by a UOW doctoral student. "If we face the challenge in a distorted way, I think this is much more effective instead of looking for a silver bullet solution," said Dr. Gibbs. She said that the shark networks in use between Newcastle and Wollongong could catch any swim that happened. The traditional lines were more oriented, but often led to the death of animals, including non-destined animals. The new SMART drumline directed system alerted the authorities when an animal had been captured, which allowed them to release it alive. Labeling the sharks captured on the drum line could help scientists study animals. But Dr. Gibbs said there were a number of concerns about the use of this technology. "I think there is a high level of concern for the community about the animal's capture history and the possible damage it can do," he said. "Some of the animals captured on the drum line will die. The survival rate after its release is unknown. And SMART scrubs will continue to capture animals that do not represent a threat to people." Dr Gibbs said so far that IPR seemed to be very successful with the goal of releasing white animals of white sharks, tigers and bulls 1 km from the shore after being trapped Liberate The animals were a contrast to a program that they studied in Western Australia a few years ago, and the existing program in Queensland, where target animals were shot. In his findings published in Marine Policy, he found that "the efficacy of lethal approaches to reduce the risk of shark shark is not compatible with consistent and convincing evidence." He also said that many people opposed the drum lines that supported them, saying that "killing sharks does not make ocean users feel safer, and do not believe they reduce the risk for themselves" . But he did not want to suggest that the same results would occur on the Far South coast. "I think it's very important to hear what people who live on the site think," he said. She said the results seemed to be much better for the SMART lines than for the shark networks established with regard to the reduction of incidental catch, which was the capture of non-destined species, which did not represent any threat to people. "So I think there's a great promise to replace the existing networks -used between Newcastle and Wollongong- with SMART drumlines," he said. "But there is still a question about why they will introduce drum lines to a place, such as the Bega Valley, which never before had a technique like this one in operation." Bega District News

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