DNA – Page 3 – Pain In The Bud

The UK’s Big Cats Are Just Like UFOs, Existing In Blurry Photos And Human Imagination

Blurry photos and fleeting encounters keep the legend of big cats in the UK alive. Could there be leopards, pumas and other large cats roaming the countryside?

For all the advances in optics and camera technology over the last 20 years alone, there are two kinds of people who love blurry, low-resolution footage: UFO enthusiasts and people who are convinced the UK is like a cold, rainy Africa with big cats lurking in every bush and field.

To be a member of either group you’ve got to shut down critical thinking faculties, suspend disbelief and put faith in the highly improbable. (Or the impossible when it comes to people who insist little green men are zipping across the night sky in sleek ships that defy all we know about physics and aerodynamics.)

The UK’s big cat believers claim the country is home to a thriving native population of large felids. Some of them think they’re “panthers,” not specifying which species of cat they think is out there, while others claim jaguars, leopards or tigers are prowling the English countryside, spotted only fleetingly at the edges of fields or in the brush, and only by people who own two-decade-old Nokia flip phones with rudimentary cameras.

They believe a native, breeding population not only exists, but for centuries has eluded capture and avoided leaving compelling evidence.

Cheetah in London — “Pardon me, mate, could you point me toward Aldersgate Street?”

The phantom cats have remarkable stealth abilities. They’ve never tripped a trail camera or appeared in a single frame of CCTV footage. Not a single tree marked for territory, not a single pile of cow bones picked clean by giant barbed tongues, not a single clump of panthera dung. Not even a hungry cub drawn into a village by the smell of barbecue on a summer night.

The reported sightings say more about human capacity for imagination — and how poor we are at estimating size over distance — than they do about the crypto-pumas and melanistic tigers some people swear they’ve seen.

When alleged big cats are spotted in the UK, they’re always seen fleetingly and from afar. When witnesses try to confirm what they’ve seen, the animals are gone.

“I was coming up to Jolly Nice from Oxford at around 7.50pm and the car in front of me was travelling at a steady pace. I looked to the verge of the other side of the road because I saw a bright pair of eyes low down. Upon further inspection, I suddenly realised there was a large outline of a low and stocky cat that was huge.”

That’s the testimony of a UK man who told the Stroud Times, a local newspaper, that he encountered a big cat a few minutes before 8 p.m. on Friday in Nailsworth, a town of about 5,600 people a little more than 100 miles west of London. His description mirrors that of others who say they’ve spotted large felids, mostly in the UK’s countryside and small villages.

Small Cats Looking Big — Photograph from a previous “big cat sighting.” It’s typical of the photos that surface with claims of leopards and pumas stalking the countryside. Blurred details and digital zoom make it difficult to gauge distance and scale.

The story’s headline reads: “Big cat expert’s verdict: beast spotted was a leopard.”

The expert in question is Rick Minter, an amateur biologist who has made UK big cat legends into something of a cottage industry by publishing books, hosting a podcast and frequently speaking to newspapers about the phenomenon. It’s not clear how Minter decided the animal in Friday’s sighting was a “black leopard,” but he’s said in previous interviews that he believes most alleged big cat sightings in the UK are leopards, with pumas accounting for most of the others.

Neither animal is native to Europe. Pumas range from South America to the American northwest and midwest, with isolated populations in places like Florida. Leopards are native to Africa and Asia, with ranges that overlap with lions on the former continent and tigers on the latter, mostly in India.

Puma at Buckingham Palace — “I’m originally from San Diego, actually, but the expat life suits me and the British are very tasty.”

Some have floated the possibility that the mysterious felids are escaped pets who have successfully adjusted to the countryside. Minter says the evidence points to breeding populations.

If there are thriving populations, the cats would need to exist in numbers, with at least 50 on the extreme low end. If they’re escaped pets, the authorities would know.

Unlike the US, where big cat ownership was banned in the vast majority of states even before the recent Big Cat Public Safety Act was passed, owning a massive carnivore slash killing machine isn’t illegal in the UK. But owners have to register their animals, seek approval for the habitats and enclosures they’ve built, and submit to annual inspection.

There have been a handful of escapes over the decades and each time the authorities were able to capture or kill the animals, often tracking them via livestock kills. Pet tigers and leopards might be dangerous, but they’re still at a disadvantage compared to their wild brethren, meaning they go for the easy, guaranteed kills when they’re hungry. Nothing’s easier than a docile farm animal that’s never seen a big cat.

Tiger at a pub — “Oi, wanna have a pint and watch Man U vs Arsenal on the telly?”

More recently, big cat hunters in the UK have tried to find more compelling evidence than a couple of blurry photographs of house cats out for a stroll. They’ve touted suspicious-looking pug marks, and in August 2022 found black fur on a barbed wire fence. According to the believers, a UK lab confirmed the fur belonged to a leopard, but there was no chain of custody, no documentation of how the sample was found and handled. Big cat experts remain skeptical.

Our research team carried out field work in fife over the weekend off the back of a recently sighted big cat 😊 #fife #BigCats #bigcatsightings #bigcatsscotland #bigcatsuk pic.twitter.com/CeUjEXJto0

— Big Cat Sightings In Scotland (@BCSI_Scotland) October 24, 2022

Indeed, Oxford’s Egil Droge, a wildlife conservationist, points out that in places where big cats live, you don’t have to go hunting for evidence. It’s everywhere.

“I’ve worked with large carnivores in Africa since 2007 and it’s obvious if big cats are around. You would regularly come across prints of their paws along roads. The rasping sound of a leopard’s roar can be heard from several kilometres,” Droge wrote, noting that leopards in particular are not discriminating about what they kill and leave ample evidence of their handiwork when they’ve hunted.

Still, as improbable as the sightings are, the big cat enthusiasts of the UK have one up on UFO enthusiasts and hunters of cryptics like Big Foot, the Loch Ness Monster and the Jersey Devil: the creatures they’re looking for actually exist and may surprise us yet.

Cat Domestication Was The Start Of A Beautiful Friendship

Domestication’s real goal: to make cats cuddly as well as great mousers.

Cats have been doing things their way since the very beginning.

Unlike literally every other domesticated animal, cats were not domesticated by humans. They did it to themselves.

As if that didn’t make them unique enough, they lay claim to another major distinction: they’re the only species of obligate carnivores to undergo domestication in the entire history of human existence.

That explains why cats, more than any other animal that depends on humans, so closely resemble the wild animals they were before signing up for the good life of naps, warmth, endless rodents to hunt and free food from their new human friends.

In a new essay for The Conversation, evolutionary biologist Jonathan Losos, author of The Age of Cats: From the Savanna to Your Sofa, notes new DNA analysis settles the question of where cats came from once and for all.

Domestic cats are descended from North African wildcats, specifically the species felis sylvestris lybica. Unlike dogs, who underwent telltale physical transformations when they evolved from wolves, house cats “appear basically indistinguishable from wildcats.”

“In fact,” Losos writes, “only 13 genes have been changed by natural selection during the domestication process. By contrast, almost three times as many genes changed during the descent of dogs from wolves.”

While the change in genetics that happen with domestication left cats pretty much as they were physically, the process made dramatic changes in the feline brain, reducing regions governing fear and expanding those related to social behavior. The result? The major difference between house cats and their wildcat ancestors is disposition.

In other words, domestication made cats cuddly.

Notably, felis sylvestris lybica had to be pretty friendly in the first place, as well as bold and driven by the now-legendary feline curiosity to risk padding into human settlements with their bright lights, strange smells, open flames and the two-legged giants striding around them.

They didn’t have a way of negotiating or signaling their intent. They couldn’t say: “Hey guys, we’re here to kill and eat the tasty rodents who have been giving you problems by chowing down on your yums, but we don’t want your yums for ourselves. Plants are disgusting!”

So they had to demonstrate their usefulness, prove their worth, and enjoy the fruits of it by curling up in front of warm fires or on human laps.

That explains why it was the African wildcat that became a human companion species and not European wildcats, whom Losos notes are often “hellaciously mean” in interactions with people, even if they’re raised around humans when they’re young. It was also a matter of being in the right place at the right time, as nascent human civilization took root in the Fertile Crescent.

But ultimately, just like cats decided to domesticate themselves and didn’t really bother to consult us about it, so too do they bend us to their will with an entire repertoire of manipulative behavior, from solicitation purrs to incessant meowing and having a talent for looking their cutest when they want something.

While we may think we set the rules and parameters of our relationship with the furry little ones, as Losos notes, “cats usually train us more than we train them.”

Read the whole thing here:

Feline evolution: How house cats and humans domesticated each other

Another Study Finds Cat Hair Can Place Suspects At Crime Scenes

Through a new resequencing technique, forensics can yield more information from a single cat hair than ever before, with major implications for crimes in places where felines are present.

Last year a forensic study broke new ground by proving there’s usable human DNA in cat fur which can prove a person was in a home or interacted with a particular pet.

Now a new study looked at the opposite situation, establishing that a single cat hair on a person’s clothes can tie them back to an individual cat — and the scene of a crime.

The general public, criminals included, are more aware of DNA and forensic techniques than they’ve ever been thanks to ubiquitous police procedurals, some of which focus heavily on the investigation and evidence-gathering aspect of police work.

But even the most fastidious criminal who is careful not to leave a single print or strand of his own hair at a crime scene can be undone by cat fur clinging to clothes. In fact it’s almost impossible for a person to spend more than a few minutes inside a cat-occupied home without picking up at least some fur, the research team said.

Detective Buddy — “Detective Inspector Buddy, at your service. Now tell me about the missing turkey…” Credit: Pain In The Bud

The paper, published this month in Forensic Science International: Genetics, outlines a new method for sequencing genetic information found on strands of cat fur.

“Hair shed by your cat lacks the hair root, so it contains very little useable DNA,” said Emily Patterson, the paper’s lead author.

Previously it wasn’t possible to narrow down with certainty whether a strand of hair belonged to a particular cat, but the research team found a new way to resequence DNA in a way that can link it to individual felines. The team’s new method doesn’t require any additional hair or roots, solving the original problem.

To prove their method works, they extracted fur from the body of a deceased cat and were able to match it to her surviving brother.

“In criminal cases where there is no human DNA available to test, pet hair is a valuable source of linking evidence, and our method makes it much more powerful,” said Mark Jobling, a geneticist at the University of Jobling and co-author of the new study. “The same approach could also be applied to other species — in particular, dogs.”

While dog hair can potentially be used in the same way, cat hair may have more forensic value from a prosecurorial standpoint because cats are territorial and many don’t leave their homes. It’s much easier to prove a suspect was inside a home if he or she is linked to an indoor-only cat than if the suspect’s clothes have fur from a dog who is walked around the neighborhood a few times a day.

Cats May Be Able To Help Detectives Solve Crimes

An Australian team decided to look for DNA evidence in a novel place: cat fur. Their findings could give law enforcement a powerful new tool to identify crime suspects.

Check out our newest feature, catwire!

When you think of a crime scene, you probably picture uniformed officers manning the perimeter, crime scene tape cordoning off the room where the deed was done, detectives trying to reconstruct what happened, and techs collecting evidence.

Those techs might swab surfaces for traces of a suspect. Drinking cups and water bottles might be dusted for fingerprints, stray hair might be bagged and sent back to the laboratory for analysis. Discarded cigarette butts, door handles, buzzers — they can all yield evidence, to say nothing of cell phones, USB sticks and smart appliances.

But what about the pets? If a suspect was especially careful not to leave prints or touch anything at the crime scene, could the fur of a cat harbor DNA?

A team comprised of scientists from Australia’s College of Science and Engineering at Flinders and the Victoria Police Forensic Services Department wanted to know if cat fur could indeed hold critical evidence at crime scenes, so they conducted a study involving 20 pet cats from different homes, and what they found could provide an important tool for law enforcement. Their findings were published in the journal Forensic Science International.

If detectives are trying to piece together the identities of robbers who, say, broke into a home, brutalized the people there at gunpoint and stole their valuables, they can’t interview the victims’ pet cats about what they saw, but it turns out they can swab the kitties’ fur and have an excellent chance of retrieving useful DNA.

Blacksad is a famous feline detective in his own series of comic books. He may have to be careful not to leave his stray fur all over his own crime scenes.

The research team swabbed the fur of pet cats in their test households, took DNA samples of the adults living in those homes — who were the stand-ins for victims — and asked the human participants to fill out surveys asking about their cats, what they do on a typical day, and whether or not they have interaction with people outside the home.

After the team conducted DNA analysis on the fur swabs “[d]etectable levels of DNA were found in 80% of the samples and interpretable profiles that could be linked to a person of interest were generated in 70% of the cats tested,” the study authors wrote.

While most of the samples matched the DNA of people who lived in the homes — as expected — samples from six cats revealed the presence of DNA from other people. The research team didn’t take DNA samples of minors, and two of the positive fur swab samples came from cats who lived in a home with a child and slept in that child’s bed most evenings. But four other samples turned up “mystery” DNA even though no one else had visited those homes for at least several days.

For DNA from pets to have any real evidentiary value, prosecutors have to prove a “chain of custody” of sorts, establishing that suspects could not have had contact with the animals in question unless they were inside a home where a crime has taken place. If the cat is allowed to roam outdoors every day, for example, it becomes much more difficult to prove a suspect’s DNA was transferred to a pet inside a home rather than on the street.

That’s why the research team is hopeful, but also cautions that their study is a first step toward understanding more about how human DNA is transferred to fur, whether it requires a person to be physically present (as opposed to their DNA being passed along secondhand in stray hair or skin cells), how long a cat’s fur can harbor human DNA, and other questions prosecutors will have to answer.

“This type of data can help us understand the meaning of the DNA results obtained, especially if there is a match to a person of interest,” said study co-author Mariya Goray, a DNA transfer expert. “Are these DNA finding a result of a criminal activity or could they have been transferred and deposited at the scene via a pet?”

The team recommends more research “on the transfer, persistence and prevalence of human DNA to and from cats and other pet animals and the influences animal behavioral habits, the DNA shedder status of the owners and many other relevant factors.”

If they do answer the aforementioned questions and prosecutors believe they can establish a suspect’s presence at a crime scene thanks to feline-provided evidence, it might not be too long before we see a cat-centric episode on future seasons of Law & Order or CSI, both of which are scheduled to be revived as police procedurals enjoy a resurgence on TV.