Overfishing of sharks is harming coral reefs, study suggests eco-business.com The reefs studied are about 300 kilometres off the coast of northwest Australia where Indonesian fishers target sharks — a practice stretching back several centuries and...
The West Australian Department of Fisheries says it will conduct further research on a marine heatwave that has been linked to a recent spate of fatal shark attacks in Western Australia,
Scientists say the unprecedented heatwave occurred off the WA coast between 2010 and 2011, and could be responsible for declining fish stocks and increased shark activity.
Ocean temperatures rose up to five degrees last summer, and the Department says that has led to pockets of cooler water developing near the coastline.
The Department's research director, Dr Rick Fletcher, says this may be causing sharks to move closer to shore.
"If there is a relatively smaller area of cooler water inshore, then the sharks could be concentrated in that smaller area," he said.
Dr Fletcher says further studies will be carried out to determine the long-term effects of the heatwave on fish stocks and shark activity.
"If we actually understand a little bit more about what conditions are more or less likely to have concentrations of White Sharks or Tiger Sharks, then we can inform the public about what the conditions are likely to be," he said.
"Two years post that initial heatwave, what's happened both to the stocks but also what's happened to the oceanographic conditions, have they returned? Or has that change dissipated over the past two years."
There have been five fatal shark attacks along the WA coast in the past two years, prompting a raft of research aimed at trying to better understand the animals.
Decline of sharks mark Decline of Coral Reefs TopNews New Zealand Scientists from Australia and Canada, led by the Australian Institute of Marine Science, have discovered a sharp decline in the number of the fish that helps to keep coral reefs...
SBS (blog) Overfishing of sharks trashing coral reefs The Australian "The reefs provided us with a unique opportunity to isolate the impact of overfishing of sharks on reef resilience, and assess that impact in the broader context of climate change...
Co-author of the Impacts of climate change on Australian marine life report, Dr Alistair Hobday, says climate change is likely to have important consequences for spawning patterns and productivity cycles in the ocean.
New Wetsuits Could Be The Answer To Increased Shark Attacks Huffington Post Australian research company SAMS' (Shark Attack Mitigation Services) shark deterrent technology may by that extra source of comfort.