Attack of the Clones: crayfish in the news Wed Feb 07, 2018, venus fly traps sea monkeys

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Attack of the Clones: crayfish in the news Wed Feb 07, 2018, venus fly traps sea monkeys

Post by redpill on Wed Feb 07, 2018 2:55 pm

Wed Feb 07, 2018

i click on the news and my news feed is dominated by a rather unusual news item

Attack of the Clones: Creature That Started as Pet Now Multiplying Out of Control
Mutant, all-female crayfish spreading rapidly through Europe can ...
All-female mutant crayfish that clone themselves are taking over ...
'They're coming!': Mutant all-female crayfish are cloning themselves .



atlas wrote:
The marbled crayfish looks much like any other freshwater crustacean. It has two claws, ten legs, and an attractive blue-brown marbled shell. Yet this six-inch creature, found in streams and lakes around the world, is far more sinister than you might expect. Its new scientific name gives a few clues: Procambarus virginalis. Every marbled crayfish is female—and they reproduce by cloning themselves.

Frank Lyko, a biologist at the German Cancer Research Center, first heard about the marbled crayfish from a hobbyist aquarium owner, who picked up some “Texas crayfish” at a pet shop in 1995. They were strikingly large, and they laid enormous batches of eggs—hundreds, in a single go. Soon, the New York Times reports, the hobbyist was beset with so many crayfish he was giving them away to his friends. And soon after that, the marmorkrebs, as they are known in German, were showing up in pet stores in Europe.

There was something very strange about these crayfish. They were all female, and they all laid hundreds of eggs without mating. These eggs, in turn, hatched into hundreds more females—with each one growing up fully able to reproduce by herself. In 2003, scientists sequenced their DNA and confirmed what many owners already believed to be the case: Each baby crayfish was a clone of its mother, and they were filling Europe’s fishtanks at alarming speed. “People would start out with a single animal, and a year later they would have a couple hundred,” Lyko told the Times.

Just 25 years ago, the marbled crayfish did not exist at all. Now, they can be found in the wild by the millions in Germany, Czechia, Hungary, Croatia, Ukraine, Japan, and Madagascar.

Online advice to marmorkreb owners is clear: They breed like bunnies. “While a 10 gallon [aquarium] is fine for a couple of months,” one site cautions, “that 10 gallon is going to get smaller and smaller as these animals reproduce. … A good rule of thumb is—the bigger the colony, the bigger the tank. Start with at least a 40 gallon and go bigger if you can afford it.” Hobbyists have discovered this truth to their cost, leading many to dump their extra pets in lakes and streams.

Whatever the conditions, the crayfish thrive. Marmorkrebs, it turns out, are as hardy as they are prolific. And when there are too many of them in a water body, they simply relocate. The Times reports that they will walk hundreds of yards to find new lakes or streams, where a single specimen can produce an entire population.

Over the past five years, Lyko and his colleagues have sequenced the genome of the marbled crayfish, publishing their findings this week in the journal Nature Ecology & Evolution. The crayfish seem to be the result of a single drastic mutation in a slough crayfish, native to the Satilla River in Florida and Georgia. Around three decades ago, two slough crayfish mated. In normal reproduction, each sex cell has a single copy of each chromosome. But there was something awry with one of these initial two crayfish—a mutation that left it with two copies in its sex cell. Somehow, the offspring was hardy and in perfect condition. Incredibly, it had three copies of each chromosome, and the ability to reproduce asexually, without requiring any input from a male.

So, will an army of female marbled crayfish clones take over the earth? It depends, Lyko told the Times. “Maybe they just survive for 100,000 years. That would be a long time for me personally, but in evolution it would just be a blip on the radar.” There are advantages and disadvantages to their asexual reproduction, he said. Population growth is explosive, with a single specimen able to produce hundreds of fertile offspring. But they are vulnerable, too. With no genetic variation, if a disease can bring down one clone, all the others are as likely to be obliterated. How long it takes for such a pathogen to come along, however, is a mystery. In the meantime, across the globe, the crayfish are making themselves at home.

when i was a kid one of my fav pastimes was to go to small ponds and streams, over turn rocks, or pick up used beer and coke cans and find tiny crayfish and bring them home and raise them as pets.

i had a pet crayfish i actually kept alive for several years until one day i noticed it was missing.

years later when we moved i finally found it completely dried up in a closet, so obviously it must have crawled out of the tank and wound up in the closet on same floor as the tank.

i kinda lost interest in pet crayfish, but reading this in the news brings up memories.

it's winter time right now, and i don't have a fish tank anymore. and they don't sell crayfish in pet stores.

i'm surprised so many news outlets from cnn to cbs to bbc are all discussing this crayfish, and they are discussing it now. its like one person decided to make this news so they are.

the other things i liked as a kid

once a year my local grocery store and Frank's nursey sold the venus fly trap

i asked my parents to buy it and they did, but these things die very quickly and easily.

then and now i have no ability to keep these things alive



sea monkeys which wow, talk about false advertising



my second and third grade elementary class there was a fish tank with standard fish and a fish bowl that had a newt. it was considered something of an honor so to speak to get me and my classmates to volunteer to clean it. looking back you can get salmonella from newts making the school liable. but at the time seeing a newt was kinda neat since it's alive but not something you can see everyday.

at this time i have zero interest in all pets, except super nice cats, which i happened to find one and adopt but after 12 years developed kidney failure and i had to put her to sleep

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Re: Attack of the Clones: crayfish in the news Wed Feb 07, 2018, venus fly traps sea monkeys

Post by TracyB on Thu Feb 08, 2018 6:26 am

i'm surprised so many news outlets from cnn to cbs to bbc are all discussing this crayfish, and they are discussing it now. its like one person decided to make this news so they are.

I used to be fascinated by how news stories became news stories, how they spread, how the public's interest could fuel or kill it, etc.

Its what helped push my temporary interest in journalism sophomore year...along with my crime interest.

As this era we're in continued to accelerate, my interest declined as social media, "trends", memetic engineering, the use of AI, etc. were manufacturing the news and how we perceive the world.

We're living in a historic moment in history and I'm not sure many people understand that. Everything is crazy yet it is the calm before the storm....the trans human era is on the way as we get closer to the singularity.

My mom hates the world now. I've seen her cry about it. She thinks about her past a lot and wishes she could go back. She knows the world will never be the same again....

and she's right.

THat crayfish story is crazy. There's a lot of stories and studies being done on animals and we're finding out some interesting things. They're finding out whales can mimic human speech...which is absolutely frightening.

Just wait until we figure out how to communicate with dolphins. It's going to happen.

My grandma was a little nutty...bless her heart....but she predicted years ago that the animals will eventually speak to us....and what they tell us isn't going to be good. When I hear stories like this, I remember her words.

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Re: Attack of the Clones: crayfish in the news Wed Feb 07, 2018, venus fly traps sea monkeys

Post by redpill on Thu Feb 08, 2018 9:01 am

TracyB wrote:
i'm surprised so many news outlets from cnn to cbs to bbc are all discussing this crayfish, and they are discussing it now. its like one person decided to make this news so they are.

I used to be fascinated by how news stories became news stories, how they spread, how the public's interest could fuel or kill it, etc.

Its what helped push my temporary interest in journalism sophomore year...along with my crime interest.

As this era we're in continued to accelerate, my interest declined as social media, "trends", memetic engineering, the use of AI, etc. were manufacturing the news and how we perceive the world.

We're living in a historic moment in history and I'm not sure many people understand that. Everything is crazy yet it is the calm before the storm....the trans human era is on the way as we get closer to the singularity.

My mom hates the world now. I've seen her cry about it. She thinks about her past a lot and wishes she could go back. She knows the world will never be the same again....

and she's right.

THat crayfish story is crazy. There's a lot of stories and studies being done on animals and we're finding out some interesting things. They're finding out whales can mimic human speech...which is absolutely frightening.

Just wait until we figure out how to communicate with dolphins. It's going to happen.

My grandma was a little nutty...bless her heart....but she predicted years ago that the animals will eventually speak to us....and what they tell us isn't going to be good. When I hear stories like this, I remember her words.

the crayfish are all females. there's an episode of outerlimits called lithia where the entire planet is filled only with women and girls. no men. men all died. it's obviously a fictional story.

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Re: Attack of the Clones: crayfish in the news Wed Feb 07, 2018, venus fly traps sea monkeys

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