CLOSE
Jebulon via Wikimedia Commons // Public Domain
Jebulon via Wikimedia Commons // Public Domain

A Project Gives Restaurant’s Leftover Oyster Shells New Life

Jebulon via Wikimedia Commons // Public Domain
Jebulon via Wikimedia Commons // Public Domain

Prior to the 20th century, New York City was considered the oyster capital of the world. Today, New York Harbor’s oyster population is a shadow of its former self, but one group is teaming up with local restaurants to change that.

As Observer reports, the Billion Oyster Project (BOP) aims to replenish the area with at least one billion live oysters by 2030. Since it was formed in 2014, the group has added 17 million of the shellfish to the bottom of the harbor.

To obtain the oyster shells used to grow new ones, BOP doesn’t have to look far. Up to half a million oysters are served in New York City eateries each week, and once they’ve been shucked and slurped clean, the shells don’t hold much value to restaurant owners. So far over 50 restaurants have signed up to donate their weekly oyster shell waste to the project. After it’s cured and prepared properly, one recycled shell can be used to grow as many as 20 new oysters.

Restoring the harbor’s oyster population to where it once was is just part of the equation. Oysters act as natural filters, with one oyster capable of cleaning up to 50 gallons of water a day. Oysters can help rid the harbor of organic waste, transforming it into a more hospitable environment for even more life. In an effort to reach their goal of one billion oysters in the next 14 years, BOP is adding several new reef sites this summer.

[h/t Observer]

Know of something you think we should cover? Email us at tips@mentalfloss.com.

nextArticle.image_alt|e
NUS Environmental Research Institute, Subnero
arrow
technology
Researchers in Singapore Deploy Robot Swans to Test Water Quality
NUS Environmental Research Institute, Subnero
NUS Environmental Research Institute, Subnero

There's something peculiar about the new swans floating around reservoirs in Singapore. They drift across the water like normal birds, but upon closer inspection, onlookers will find they're not birds at all: They're cleverly disguised robots designed to test the quality of the city's water.

As Dezeen reports, the high-tech waterfowl, dubbed NUSwan (New Smart Water Assessment Network), are the work of researchers at the National University of Singapore [PDF]. The team invented the devices as a way to tackle the challenges of maintaining an urban water source. "Water bodies are exposed to varying sources of pollutants from urban run-offs and industries," they write in a statement. "Several methods and protocols in monitoring pollutants are already in place. However, the boundaries of extensive assessment for the water bodies are limited by labor intensive and resource exhaustive methods."

By building water assessment technology into a plastic swan, they're able to analyze the quality of the reservoirs cheaply and discreetly. Sensors on the robots' undersides measure factors like dissolved oxygen and chlorophyll levels. The swans wirelessly transmit whatever data they collect to the command center on land, and based on what they send, human pilots can remotely tweak the robots' performance in real time. The hope is that the simple, adaptable technology will allow researchers to take smarter samples and better understand the impact of the reservoir's micro-ecosystem on water quality.

Man placing robotic swan in water.
NUS Environmental Research Institute, Subnero

This isn't the first time humans have used robots disguised as animals as tools for studying nature. Check out this clip from the BBC series Spy in the Wild for an idea of just how realistic these robots can get.

[h/t Dezeen]

nextArticle.image_alt|e
iStock
arrow
science
There May Be an Ancient Reason Why Your Dog Eats Poop
iStock
iStock

Dogs aren't known for their picky taste in food, but some pups go beyond the normal trash hunting and start rooting around in poop, whether it be their own or a friend's. Just why dogs exhibit this behavior is a scientific mystery. Only some dogs do it, and researchers aren't quite sure where the impulse comes from. But if your dog is a poop eater, it's nearly impossible to steer them away from their favorite feces.

A new study in the journal Veterinary Medicine and Science, spotted by The Washington Post, presents a new theory for what scientists call "canine conspecific coprophagy," or dogs eating dog poop.

In online surveys about domestic dogs' poop-eating habits completed by thousands of pet owners, the researchers found no link between eating poop and a dog's sex, house training, compulsive behavior, or the style of mothering they received as puppies. However, they did find one common link between the poop eaters. Most tended to eat only poop that was less than two days old. According to their data, 85 percent of poop-eaters only go for the fresh stuff.

That timeline is important because it tracks with the lifespan of parasites. And this led the researchers to the following hypothesis: that eating poop is a holdover behavior from domestic dogs' ancestors, who may have had a decent reason to tuck into their friends' poop.

Since their poop has a high chance of containing intestinal parasites, wolves poop far from their dens. But if a sick wolf doesn't quite make it out of the den in time, they might do their business too close to home. A healthier wolf might eat this poop, but the parasite eggs wouldn't have hatched within the first day or two of the feces being dropped. Thus, the healthy wolf would carry the risk of infection away from the den, depositing the eggs they had consumed away in their own, subsequent bowel movements at an appropriate distance before the eggs had the chance to hatch into larvae and transmit the parasite to the pack.

Domestic dogs may just be enacting this behavior instinctively—only for them, there isn't as much danger of them picking up a parasite at home. However, the theory isn't foolproof. The surveys also found that so-called "greedy eaters" were more likely to eat feces than dogs who aren't quite so intense about food. So yes, it could still be about a poop-loving palate.

But really, it's much more pleasant to think about the behavior as a parasite-protection measure than our best pals foraging for a delicious fecal snack. 

[h/t The Washington Post]

SECTIONS

arrow
LIVE SMARTER
More from mental floss studios