Kersey Sturdivant • Fun Science Friday, Uncategorized • April 24, 2015
You’ve been there before. You are sitting or standing around and get a mental sensation that you need to “pop your knuckles”. A swift squeeze of your fingers and the tension is relieved. Crisis averted. But why do knuckles make that popping sound when you crack them? If questions like this keep you up at night… maybe you need to reevaluate your priorities. But, if the start of this article has piqued your interest, you will be pleased to know that a a team of researchers, led by the University of Alberta Faculty of Rehabilitation Medicine, have confirmed the reasons for knuckle popping.
Pull My Finger experiment. The radiofrequency coil inside the clear housing (left).
The metocarpophaangeal (MCP) joint of interest centred over the bore of the radiofrequency coil (middle). The participant’s hand within the imaging magnet (right). (Photo credit: Kawchuck et al. 2015, PLoS ONE)
Andrew David Thaler • deep sea, marine science, Natural Science, Science • April 23, 2015
Fig 3. Temporal sequence of landscape at/around Hole D/E. From Nakajima et al. 2015.
A longtime submariner I know tells the story of a most unusual dive. On this particular plunge, they went down into the briny deep to place what can best be described as a giant manhole cover on the seafloor. There was a hole, and, by all accounts, the sea was draining in to it.
For more than half-a-century, we’ve been drilling holes in the bottom of the sea. Some reveal the buried history of the evolution of our oceans. Others uncover vast wells of crude oil. Science, exploration, and exploitation have all benefited from ocean drilling programs. But what happens to the seafloor when you punch a hole in the ocean? In my friend’s case, the drilling program opened a sub-sea cavern, resulting in changes to local current regimes, potentially disturbing the surrounding benthic community. The most practical solution was to simply plug the hole.
We’ve punched a lot of holes in the seafloor, but despite a few anecdotes and scant research, we know precious little about how these holes actually alter the marine environment. This is particularly worrying, as deep-sea mining at hydrothermal vents, manganese nodule fields, and oceanic crusts are slowly creeping out of the realm of science fiction and into our oceans. Ocean drilling in the deep sea is perhaps the closest analog to industrial-scale deep-sea mining. Understanding the potential impacts is critical to designing management and mitigation regimes that protect the delicate deep seafloor.
Chris Parsons • Life in the Lab, Personal Stories •
Conference season is fast approaching, and around the hallowed halls of academia frantic graduate students are rushing around trying to cat herd committee members for thesis drafts and preparing the capstone to all of their recent study and research: the thesis defense. For the past two weeks my life has largely been back to back student presentations, and on the whole they were excellent. a couple of moments when nerves got the better of presenters, but generally high quality.
Then I went to an academic meeting, and I was reminded again why we are struggling to communicate environmental issues to the general public. I had forgotten quite how excruciatingly dull and painfully constructed academic presentations can be.
The presenters were completely unaware of the effect of their talks on the audience, who were checking email, napping and in one case just staring blankly at a wall, which was obviously more entertaining than the presentation at hand.
It really was a master class in how to ensure that your presentation was as dull, dense, and obtuse as possible. So for the benefit of those who what to ensure that they can give the most perfectly dull academic presentation, here are some tips:
Kersey Sturdivant • #OceanOptimism, Fun Science Friday • April 17, 2015
Happy FSF Folks!
So this news has been making the rounds, and it is too amazing not to include for FSF. So if you missed it, you are in luck because we highlight it again here. A giant sperm whale was captured by a remotely operated vehicle (ROV) piloted as part of Bob Ballard and the Corps of Exploration’s Nautilus cruise. The whale was captured by the ROV Hercules at 598 meter (1,962 ft) below the sea surface in the Gulf of Mexico off the coast of Louisiana.
Sperm whale captured at 598 meter (1,962 ft) depth by the ROV Hercules. (Photo Credit: Ocean Exploration Trust)
David Shiffman • Blogging • April 13, 2015
There are still a couple of days left to donate to the most important marine science and outreach crowdfunding campaign of our time, “buy David Shiffman a less ugly pair of sunglasses.” In the meantime, new rewards have been unlocked! For a $30 donation, you’ll receive a small 3D printed megalodon tooth, one of the first of its kind anywhere in the world! And, as a special reward for everyone who has been helping us to support this cause, Andrew and I will do a synchronized Netflix viewing of James Cameron’s Deepsea Challenge tomorrow (Tuesday) at 8 p.m. eastern! To participate, start the documentary on Netflix streaming at exactly 8 p.m. eastern time on Tuesday evening, and follow along with #DeepSeaChat on twitter!
Thanks for your support of marine science and outreach!
Guest Writer • marine science, Natural Science, Science, sharks •
Dr. Ryan Kempster is a shark biologist in the Neuroecology Group at the University of Western Australia. Ryan founded the shark conservation group Support Our Sharks to inform the world about the plight of the most vulnerable shark species. His research focuses on the sensory biology and conservation of sharks and rays. Sharks have always been his passion, and protecting them his goal. To do this, Ryan has embarked on a career in research to better understand sharks. He takes every opportunity to communicate his findings to the general public in the hope that he can inspire others to follow in his passion for protecting these amazing animals.
Effective management of sharks starts with an understanding of their population status, which ultimately instructs their future conservation. Unfortunately, many shark species are at significant risk of unrecoverable decline, with some species having declined to near extinction in recent years. We believe that Citizen Science could hold the key to improving our understanding and management of shark populations, whilst also advancing community education. This is why we have developed SharkBase, a global shark encounter database helping to map the distribution and population structure of sharks worldwide (you can also record ray and skate sightings).
Andrew David Thaler • #OceanOptimism, Popular Culture, Science • April 10, 2015
Last week, we launched a novel little experiment in crowdfunding marine science and conservation – Buy David Shiffman a Less Ugly Pair of Sunglasses – ostensibly about replacing David’s legendarily hideous sunglasses with something a bit more aesthetic. Of course, anyone digging into the stretch goals quickly realized that this was less about sunglasses and more about funding some cool research and outreach projects we’re currently working on; projects like a hammerhead conservation genetics analysis, building a marine ecology drone, and sending students from underserved schools of a shark tagging trip. This was made more explicit when we hit our first goal in the first 36 hours of funding.
With the first funding goal achieved, I decided we needed a cool perk, something not particularly expensive to produce but completely novel and cool enough to justify making a heftier donation. And, of course, it needed to be thematically related to the spirit of the project.
Enter the Megalodon.
Andrew David Thaler • Science • April 8, 2015
I submitted the following to the FAA regarding docket number FAA-2015-0150: Operation and Certification of Small Unmanned Aircraft Systems. Comments can be filed online, but I also sent an actual, physical letter. If you care about the regulation of drone in US airspace, you have until April 24, 2015 to submit you own.
I am a marine ecologist based in Virginia, with plans to operate small Unmanned Aircraft Systems in the conduct of marine ecologic research.
With regards to the FAA’s recently proposed regulations for the Operation and Certification of Small Unmanned Aircraft Systems, I find that the vast majority of suggested restrictions and requirements to be both reasonable and not particularly onerous for those wishing to operate UAS’s for commercial purposes. I commend the FAA for taking a pragmatic approach to UAS regulation. In particular, I support the requirement for a comprehensive knowledge test, which will be separate from and less expensive than a full pilot’s license. I also appreciate the recognition that UAS technology is advancing so quickly that a certification of airworthiness for specific airframes will place an undue burden on commercial pilots and force them to operate vehicles several generation behind the state of the art. I also approve of a special exemption for “microdrones”, which have significantly a lower safety risk and allow UAS pilots additional freedom in their use of very small vehicles.
I approve of the requirement that operators maintain visual line-of-sight, however, in the proposed regulations, there are make no provisions for autonomous flight. Autonomous flight dramatically changes the relationship between the aircraft and the operator and is an essential component of ecological surveys, allowing drones to fly straight transects and pinpoint sampling sites. This points to a more specific problem with the proposed regulations: in current form, there is little clarity regarding the role of scientists and other researcher in relation to UAS use. Will ecologists fall under the same restrictions as commercial drone pilots, or will they be treated more similar to hobbyist?
I urge the FAA to adopt a “Science Flyer” certification, similar to the American Association of Underwater Scientists “Science Diver” program. To wit, science divers have enhanced training requirements over recreational SCUBA divers, but less than professional commercial divers. A Science Flyer program could span a similar gap, with more training requirements than a hobbyist but fewer restrictions than a commercial UAS operator and could also provide additional training and certification to allow for autonomous operation.
Guest Writer • Blogging, Conservation, fisheries, marine science, Natural Science, Science • April 6, 2015
Stacy Aguilera is an Abess Fellow at the University of Miami. Her dissertation research focuses on why certain small-scale fisheries in California are relatively successful, from a social and ecological perspective. Follow her on Twitter here!
As my favorite little green guy once said, “Difficult to see. Always in motion is the future.” Yoda may have never shared some brewskies after work with a bunch of fishery managers, but boy would they cheers to this. Managing fisheries is a tough job, especially considering all the many factors that can quickly and drastically change a fishery. We’ve got markets bouncing here and there, climate varying in short blurps and over a long time, technology is getting better, and new regulations are proposed and passed all the time. You have to think about all the people involved while also thinking about the species and broader ecosystem as a whole. All these things happening at once means fishery managers, and especially fishermen, processors, and buyers, are dealing with an uncertain future and while some things are predictable, the future is indeed difficult to see.
So how do we manage and fish to keep our fishing industry alive, while also keeping our oceans healthy and full of life? One way is to manage for flexibility. As our recent paper published this March in PLoS ONE explains, managing fisheries adaptively is difficult, but allowing participants to fish multiple fisheries is a strategy that can help. When fishery participants can access many fisheries, they can then support themselves and the local fishery in difficult years, tapping in to multiple resources. This in turn also helps the environment, as shifting fishing effort from one species that isn’t doing so well relieves pressure when fishing then targets another species that may be doing much better at that time.