The rodents’ golden-brown fluff made them internet stars, but some scientists were skeptical that such a creation brought the field any closer to bringing back woolly mammoths. And a new preprint to be posted soon counters one common critique of the work, showing that dire wolves may be more closely related to modern wolves than previously thought. By making a handful of genetic changes, “we’ve brought these extinct genes back to life in a living animal,” she says. But that type of thinking “kind of misses the point,” says Beth Shapiro, chief science officer at Colossal Biosciences in Dallas. Their names are Romulus, Remus and Khaleesi, and they’re the first dire wolves to walk the Earth in over 10,000 years — or so one biotech company and a flurry of recent headlines say.
Medicine
Animal welfare legislation may make it illegal to boil lobsters alive, requiring swifter, less painful methods to kill the animals. Such findings could drive changes in how we treat the animals in our care. They’re finding thought-provoking answers amid a wide array of animals. We take our own lived experiences and fill in gaps with our imaginations to better understand and relate to the animals we encounter. At least, that’s what we may think animals feel when they act the way they do.
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Selection for tameness
- Canis is the group that includes wolves, dogs and coyotes.
- Scientists studying animal behavior and animal welfare are making important strides in understanding how the creatures we share our planet with experience the world.
- Researchers have set out several biological criteria that should determine when silver foxes, or other animals, cross the line that divides merely tame from fully domesticated.
- “I think the concept of conserving species that are critically endangered is fantastic,” she says.
- The rodents’ golden-brown fluff made them internet stars, but some scientists were skeptical that such a creation brought the field any closer to bringing back woolly mammoths.
- Then some people, somewhere, brought wild things under human control.
People often misjudge cues about animal emotions, though these two dogs sure look happy. Animal welfare researchers are getting creative to pin down subjective experiences Susan Milius is the life sciences writer, covering organismal biology and evolution, and has a special passion for plants, fungi and invertebrates. “Some people will do anything for money,” he says. By the time the cow’s meal reaches the intestinal zone for nutrient absorption, big tough molecules have become tidbits in easy-to-absorb slosh.
Across the internet and social media, critics of Colossal’s work have been vocal about dire wolves not actually being wolves at all. The researchers modified a coat color gene called CORIN, for example, which gave the pups their light fur. If scientists analyzed that cheek sample, they’d see hundreds of millions of DNA letters, like long paper streamers. As soon as an animal dies, its DNA “starts to get chopped up into really tiny pieces,” Shapiro says.
Science News
- Palaeolithic dog skulls at the Gravettian Předmostí site, the Czech Republic.
- Facial expressions are a more direct way to assess pain or other types of distress in animals, Leach says.
- We are at a critical time and supporting science journalism is more important than ever.
- Those prizes were part of nearly $4 million in scholarships, tuition grants and scientific trips and equipment awarded at the world’s largest high-school science competition.
- Bonds between humans and their animal companions may be more important than rigid biological criteria, Larson and other researchers argue.
It costs farmers about $1 to $3 per head to treat their livestock with either procedure, notes animal scientist Michael J. Fields of the University of Florida in Gainesville. Moreover, he notes, because all such drug treatment in Europe is illegal, illicit users tend to employ whatever is available and affordable. The Munich scientists then looked at how well the steroids survived in manure. However, Guillette adds, when one considers new German data on how long steroidal growth-promoting drugs can persist in the environment, “it’s highly likely that what we’re seeing in these wild fish is a pharmaceutical effect” derived from the farm use of these agents. These observations indicate that wild fish “are orionsbet casino review being nailed by polluting hormones,” Guillette told Science News–with males becoming somewhat feminized and females somewhat masculinized.
Pain in two parts
Relieving the animals’ boredom with extra playtime turned their interests away from the negative, Burn and her colleagues reported in February 2020 in Animal Welfare. Then, the researchers placed the animals in either a pleasing, predictable living environment or an annoyingly variable one. But “animals that are feeling well all the time don’t need this to get rid of the stress.” Hausberger, who raises horses on her farm in Brittany, began studying horse welfare about three decades ago, after observing that people who keep horses often misjudge cues about the animals’ behavior.
Mental health
In females, the researchers observed a significant increase in the ratio of androgenic to estrogenic hormone concentrations in blood. One downstream sample exhibited nearly four times the androgenicity of the upstream water. At the Copenhagen meeting, Soto reported finding that concentrations of estrogenic pollutants at two of the downstream sites were sometimes almost double those at the upstream site.
More Stories from Science News on Animals
What’s more, Colossal doesn’t currently have a breeding population of the animals, so their pups don’t really have a pack to live and hunt and play with. “I’d really like to see these animals,” says Adam Hartstone-Rose, a comparative anatomist at North Carolina State University in Raleigh. It’s unclear where exactly the pups are living, but according to a Colossal news release, they’re housed on an 800-hectare preserve and have 10 full-time caretakers. That’s not true for animals that have been extinct for thousands of years, which raises some ethical questions, she says. “These animals are already in the ecosystem, and we know their role.”
Because neural crest cells contribute to so many tissues in the body, altering their function could change an animal’s behavior, appearance and biology, the researchers reasoned. Selecting animals for tameness, they said, could alter genes that control a group of developmentally important cells called neural crest cells. But scientists didn’t have a unifying explanation for why the physical traits of domestication syndrome were linked to tameness until three years ago. Many people think it was about the relationship; tameness and docility were the most attractive qualities in potential animal pals. By that time, the birds had been domesticated for thousands of years.
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