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Showing posts with label sharks. Show all posts
Showing posts with label sharks. Show all posts

Thursday, April 20, 2017

The Great White shark, climate change and ocean carbon cycles


The latest media 'hysteria' about shark attack arises from a tragic fatal bite incident when WA teenager Laeticia Brouwer was mauled by a shark at the popular surf break - Kelp Beds - near Esperance (south coast of Western Australia) just before 4pm on Easter Monday (2017).

The paramedic who was first on the scene said the teenager suffered tremendous blood loss and couldn’t be saved despite quickly receiving first aid.

While sharks are relatively common in coastal waters, attacks are exceptional given the overwhelming presence and numbers of people in the surf zone. You are more likely to be killed in a road accident, riding a horse or a vending machine, than by a shark.

Federal Environment Minister Josh Frydenberg says WA isn’t doing enough to protect people from sharks urging shark culls and drum lines, according to the West Australian. "In light of the recent shark attack, the Commonwealth would welcome any proposal to protect human life first and foremost,” he said. “This could include the newest drum-line technology, shark exclusion nets, culling or other measures which WA sees fit.”

WA Fisheries Minister Dave Kelly has ruled out the idea of a shark cull in response, according to the ABC. "We're not going down the path of a cull because there's no evidence that it actually makes our beaches safer," he said, "...no evidence that that actually reduces the likelihood of future attacks," Kelly said.

Like on climate change, we are seeing the issue of shark conservation or culling being politicised rather than public education and options for shark incident mitigation. Our Federal Environment and Climate Change Minister should know better. The oceans are the domain of sharks and they have an important role to play as apex predators as part of the ocean carbon cycle. When we swim in the oceans we need to be mindful of the risks involved, including utilising the latest in public shark warning and repellent devices.

Mindless culling of sharks will not actually reduce the risk of shark attack without doing great harm to the ocean ecosystem trophic structure. It is as apex ocean predators that sharks do us the greatest service in maintaining the ocean carbon cycle and help keep carbon sequestered in coastal sea areas (Blue Carbon) to help us mitigate climate change.

Sunday, January 5, 2014

Sea surface temperatures unusually warm around Australia in 2013

Sea surface temperatures around Australia in 2013 were unusually warm reported the Australian Bureau of Meteorology in it's annual climate statement. Record ocean temperatures were recorded for January and February, with November the second-highest on record. This continues a long term trend for increasing sea surface temperatures around Australia and globally.

Updates: