Fun Science FRIEDay – Gut Enzyme Turns Blood Into Type O

The process of blood transfusions, started in the late 19th century and perfected in the early 20th century, were a big advancement in modern medicine and the treatment of human health. Part of the improvements in this procedure was the discovery of the various blood types in humans, and how that affects how the immune system responds to and “accepts” blood transfusions. Recently, researchers from the University of British Columbia may have found a reliable way to use a bacterial enzyme from the human gut to convert any type of blood into type O – which is compatible with nearly everyone.

Animation of red blood cells (Photo credit: meghanmecrazy)

Read More

Canada announced new marine protected area standards. Here’s how science and conservation professionals reacted.

Recently, the Canadian government released the Final Report of the National Advisory Panel on Marine Protected Area Standards. This report is a set of guidelines and goals for the creation of new marine protected areas in Canada, and comes as Canada is hoping to greatly increase the number and quality of MPAs. I reached out to MPA experts and environmental nonprofits to ask what they think.

Read More

Barndoor skates, once a textbook example of overfishing, have recovered enough to allow fishing

Barndoor skates were once thought to be so overfished that a highly-publicized paper from 1998 noted that they had been “driven to near extinction without anyone noticing.” One of the largest skates, barndoor skates can reach over 5 feet in wingspan, which is large enough that their diet includes small sharks like spiny dogfish; for a skate, that’s about as close as it gets to charismatic megafauna!

Recently, NOAA Fisheries announced that Barndoor skate populations off the Northeastern United States had finally recovered enough that fishing for them could resume. This move comes after a 2009 NOAA Fisheries report showed that the species had begun to recover enough that they could be removed from the species of concern list, though they remained protected at the time. “This is good news,” Mike Ruccio, a Supervisory Fishery Policy Analyst for NOAA Fisheries Greater Atlantic Regional Fisheries Office, told me. “Rebuilding overfished stocks is one of the cornerstones of the US domestic policy on fisheries.”

Read More

What to do after the first fatal shark bite in Massachusetts since 1936: 3 experts respond

Two weeks ago, tragedy struck in New England as a boogie boarder was killed by a great white shark. Though shark bites* in general and fatal shark bites* specifically are incredibly rare (Mr. Medici was the first person killed by a great white shark in Massachusetts waters in 82 years), emotions are running high. Some Cape Cod residents are explicitly calling for a cull (targeted killing) of great white sharks.

Such a cull would be devastating for a recovering but still protected shark species, has been shown not to effectively reduce shark bites, and is opposed by shark experts around the world, but what, if anything, should local governments do instead? I’ve written in the past about alternatives to lethal shark control here and here, but not every solution is applicable for every location; local oceanographic conditions vary, as well as local laws and cultural norms. I reached out to three experts to ask what, if anything, they think should be done here. Here’s what they had to say:

Read More

The rise of low-cost ROVs and community submersibles

The following appeared this Monday on the DSM Observer, the only trade journal committed to covering all aspects of the emerging deep-sea mining industry. Though written for the deep-sea mining community, the subject is broadly relevant to a host of ocean industries, so we reprint it below. 


The submarine Noctiluca cruises across the surface. Photo Courtesy Shanee Stopnitzky.

The submarine Noctiluca cruises across the surface. Photo Courtesy Shanee Stopnitzky.

As a community, we discuss mining, management, and monitoring, as well as the regulations that shape them, in terms of governments, major corporations, and research institutions. The deep-sea mining community is small and the complexities of working at abyssal depths engenders collaboration, cooperation, and, in the case of exploitation, compromise. While there are many stakeholders potentially affected by deep-sea mining, only a small proportion of them will ever directly engage with the deep seafloor.

A few extremely wealthy individuals have access to private submersibles and ROVs and have on occasion made them available for research and exploration, but they are the exception. The tools necessary to reach the depths of a hydrothermal vent or polymetallic nodule field are simply too expensive.

That may soon change.

Read More

Shark Week 2018 overall thoughts and episode reviews

The 30th anniversary of Shark Week was the biggest ever, with 22 episodes. It was, as usual, a bit of a mixed bag, though nothing was anywhere near as bad as the bad old days of Megalodon, and there was some pretty good stuff. As has become tradition here at Southern Fried Science, here are some overall thoughts on this year’s Shark Week, as well as reviews for each episode (not counting the clip shows, which I didn’t watch- even I have limits).

Overall thoughts:

  • I heard more references to shark conservation this year, though almost exclusively offhand references to how the Bahamas is a Shark Sanctuary (there was one mention of shark fin trade bans in the Shark Tank show).
  • There were more women scientists and non-white scientists than I can remember, but still some major issues with diversity of scientists. (The white male scientists were still treated differently, including being given their full titles, and in one case a white male with a Masters was called Dr. while a woman with a Ph.D. was not called Dr.).
  • 22 shows is too many shows. I may be the only one in the world who actually tried to watch them all and I had to skip the clip shows because even I have limits.

Rather than organizing episode reviews in chronological order or air date, this year I’m going to organize them by theme.

Read More

Fun Science FRIEDay – Resurrection

Life has unbelievably complex and diverse strategies to ensure survival. Organisms are able to go dormant during unfavorable conditions, and resuscitate once the environment becomes ideal again. This can play out over relatively short time periods such as when animals hibernate, or over longer periods where organisms can go into stasis, e.g. reviving bacteria from 250 million year old salt crystals.

Researchers in Russia recently thawed out permafrost sediment frozen for the past 42,000 years, and revealed once frozen and now living nematodes. Yes you heard that correctly, worms birthed and subsequently frozen during the Pleistocene (42,000 years earlier) were just resurrected in the 21st century. Frankenstein, eat your heart out.

Eophasma jurasicum, a fossilized nematode. (Photo credit: Ghedoghedo)

Read More

I built a head-mounted LiDAR array that lets you see the world like a dolphin via vibrations sent through your jaw.

I’m Andrew Thaler and I build weird things.

Last month, while traveling to Kuching for Make for the Planet Borneo, I had an idea for the next strange ocean education project: what if we could use bone-conducting headphones to “see” the world like a dolphin might through echolocation?

The author wearing a head mounted LiDAR array, looking very pensive.

Spoilers: You can. Photo by A. Freitag.

Bone-conducting headphones use speakers or tiny motors to send vibrations directly into the bone of you skull. This works surprisingly well for listening to music or amplifying voices without obstructing the ear. The first time you try it, it’s an odd experience. Though you hear the sound just fine, it doesn’t feel like it’s coming through your ears. Bone conduction has been used for a while now in hearing aids as well as military- and industrial-grade communications systems, but the tech has recently cropped up in sports headphones for people who want to listen to music and podcasts on a run without tuning out the rest of the world. Rather than anchoring to the skull, the sports headphones sit just in front of the ear, where your lower jaw meets your skull.

This is not entirely unlike how dolphins (and at least 65 species of toothed whales) detect sound.  Read More

Fun Science FRIEDay – The Break-up

Our lives are a blip in the space time continuum. As a result, it can seem that the Earth is relatively static, with many of the large scale dynamic changes that shape our sphere largely unnoticeable to us occurring on geological time-scales. One such change is the movement of landmasses on earth, better known as plate tectonics.

Earth’s landmasses are not static but in constant flux. The Earth’s lithosphere (formed by the crust and the upper part of the mantle) is broken up into a number of tectonic plates that move relative to each other at varying speeds, “gliding” over a viscous asthenosphere. There is still ongoing debate about what force or forces causes this movement, but whatever the forces are they can also cause the plates to rupture, forming rifts, and potential leading to the development of new plate boundaries. When this happens landmasses break-up and new continents forms; this is currently happening in the East African Rift in southwestern Kenya.

View of East African Rift in Kenya from space (Photo credit: Google Earth. Data SIO, NOAA, US Navy, NGA, GEBCO).

Read More

ACTION ALERT: Protect Florida sharks from harmful fishing practices

After years of scientists and conservationists complaining about problems with common land-based shark fishing practices, the Florida Fish and Wildlife Conservation Commission is finally taking action! At their April meeting, FWC formally announced that they are considering revising regulations governing this activity with the goal of restricting the unnecessary and cruel handling practices that result in killing protected species of sharks.

(For background on this topic, please read my detailed open letter, or this summary of my research).

Here are the options that FWC is considering.

Examples of unequivocally illegal shark fishing from Shiffman and Friends 2017

 

How can you help? Either physically attend a workshop or send a formal comment online!

 

Read More