Tuesday, September 14, 2010
Tuesday, July 27, 2010
A Ray of Hope for Manta Rays in Brazil
Dr Andrea Marshall, also known as Queen of the Mantas from the BBC’s 2009 documentary film, has attached a satellite tag to a giant 4meter manta ray off the coast of South America. This ambassador for Brazilian manta ray conservation is the first manta ray in the Southern Atlantic Ocean to be satellite tagged and another first for Andrea, who originally discovered and tagged this second species of manta ray, Manta birostris, in 2009 in Mozambique.
The tagging is a fundamental part of a comparative worldwide research campaign called ‘Ray of Hope’ funded by the Save Our Seas Foundation (SOSF) and conducted by the Marine Megafauna Foundation (MMF), which is investigating the behaviour and movement patterns of the newly-described giant manta ray. Andrea and colleagues Dr. Simon Pierce and Dr. Juerg Brunnschweiler are travelling to several locations across the globe, teaming up with local researchers or dive operators along the way to locate these mysterious and severely understudied mantas. In Brazil Andrea is collaborating with the Laje Viva Institute and researchers from their ‘Mantas of Brazil’ project.
“This achievement is a piece of manta research history but more than that it is the start of my collaborative work in South America on this species which is currently the only research being conducted on manta rays in the southern Atlantic Ocean. It is a really important step in trying to understand how this species uses the coastline of Brazil, if it travels distances offshore, where their seasonal movements take them and what threats they face on their journeys,” said Andrea.
The tag was deployed last week on a large mature male at Laje de Santos, the largest documented aggregation site for the Manta birostris species in the Southern Atlantic Ocean, and is programmed to stay on the manta ray for 180 days. For the next six months the tag will accompany the manta on its journey through the oceans, functioning like a mini-lab and storing data critical to the investigation. As well as recording the water temperature through which the manta swims and the depths the animal reaches, it also records the light levels and its GPS position every time it breaks the surface, information used in determining the individual’s actual track.
Almost nothing is known about the lives of manta rays in South America and Andrea hopes the study will help answer a series of questions aimed at providing invaluable information for managing the region’s manta ray population and better protecting them from fishing pressure and other human induced threats such as shipping traffic. “As we continue to learn more about these ocean giants, I also continue to learn and grow as a scientist. Patience is an important skill in field research as is the determination to see difficult projects through to completion. In the end, persistence will pay off, and although we sometimes feel that we are racing against time, we are ultimately at the mercy of the animals that we study and the elements of nature. Sometimes sitting back and waiting for them to come to us is the only solution,” said Andrea.
The research is funded through the Save Our Seas Foundation (SOSF).
Tuesday, May 26, 2009
Brian Darvell - Sounding The Alarm
Mantas are in trouble. Here's his first person report:
The Chinese slaughter mantas in their thousands for their gill rakers for use in traditional 'medicine'.
The largest Chinese medicine market in China, in Guangzhou - a whole block of shops on three floors of the most amazing things. These included literally tonnes of dried seahorses - shops-full at a time, and similarly manta gills, 10s of thousands that I saw - boxes piled high.
This is NOT a small, subsistence market, by any means. It is a massive, commercial operation that somehow has evaded notice. It can be added to the foul practices of using bear bile, tiger bone, seahorses etc etc for the magical, culturally-sanctioned, devastation of wildlife of all kinds. If it moves - eat it.
It is about time that the centrality of Chinese activity in these matters was addressed properly, instead of pussyfooting around trying not to offend. Culture or long tradition is no longer an acceptable defence for anything, anywhere, now where commercial exploitation is involved. True subsistence use is hard to find, and altogether negligible in impact.
Saturday, May 23, 2009
Goblin girl... on eating manta rays!
Friday, September 5, 2008
Underwater Photography-Capturing "The Moment"
The world of underwater digital photography is fast becoming an epic horse race. At the front of the pack you have several well known faces and shooters who make a living from the imagery they bring to the world.For the most part it's stunning stuff. Case in point Ethan Gordons recent work in Scuba Diving Magazine on Chuuk Lagoon. Almost every month new images surface that take your breath away from the pack leaders.
Then there are guys like Derek Heasley who are less well known but shoot with a cool eye towards brilliance. It's not easy to "capture the moment" when it happen with wildlife. But rest assured when the "moment" happens-if Derek is within lens shot of it, he'll nail it.
Here's his website Sea Pixels