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Porn Users Forum » Female dragonflies fake sudden death to avoid male advances
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10-25-17  09:17am - 2615 days Original Post - #1
lk2fireone (0)
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Registered: Nov 14, '08
Location: CA
Female dragonflies fake sudden death to avoid male advances

https://www.newscientist.com/article/212...avoid-male-advances/


New Scientist


27 April 2017
Female dragonflies fake sudden death to avoid male advances

By Sandrine Ceurstemont

Female dragonflies use an extreme tactic to get rid of unwanted suitors: they drop out the sky and then pretend to be dead.

Rassim Khelifa from the University of Zurich, Switzerland, witnessed the behaviour for the first time in the moorland hawker dragonfly (Aeshna juncea). While collecting their larvae in the Swiss Alps, he watched a female crash-dive to the ground while being pursued by a male.

The female then lay motionless on her back. Her suitor soon flew away, and the female took off once the coast was clear.

“I was surprised,” says Khelifa, who had never previously seen this in 10 years of studying dragonflies.

Female moorland hawkers are vulnerable to harassment when they lay their eggs since, unlike some other dragonflies, they aren’t guarded by their male mates. A single sexual encounter with another male is enough to fertilise all eggs and copulating again could damage their reproductive tract.

Khelifa found that the females often retreat to dense vegetation near ponds at this time, probably to hide. And they often act dramatically when they emerge.
High-speed plunge

He observed 27 out of 31 females plummeting and playing dead to avoid males, with 21 of these ploys successful. Plunging at high speed is risky though, and according to Adolfo Cordero-Rivera at the University of Vigo in Spain, it may be a strategy that they use only in areas with lots of dragonflies. “Females may only behave in this way if male harassment is intense,” he says.

Few animals have been caught feigning death to trick suitors. The behaviour has been seen in a species of spider (the males use it to improve their chances of mating), two species of robber fly and a type of mantis.

Playing dead to avoid predators, however, is more common and has been observed in dragonflies. “It’s likely that females expanded its use to overcome male coercion,” says Khelifa.

Khelifa is interested in finding out whether the behaviour is unique to species that lay eggs alone or whether it is more widespread. Using extreme tactics to resolve sexual conflict isn’t unique to moorland hawkers: in their damselfly relatives, for example, females eat their partner.

Journal reference: Ecology, DOI: 10.1002/ecy.1781

© Copyright New Scientist Ltd.

10-26-17  04:31pm - 2614 days #2
RagingBuddhist (0)
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All well and good for the females - until a male comes along that's into necrophilia. Sarcasm is a body's natural defense against stupidity.

10-27-17  06:42am - 2613 days #3
Amanda (0)
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Posts: 534
Registered: Jul 02, '15
Location: Montreal, Quebec
Originally Posted by RagingBuddhist:


All well and good for the females - until a male comes along that's into necrophilia.


Ha ha ha! So true!

10-28-17  08:29pm - 2611 days #4
Drooler (0)
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Seems like a case of make it 'til you fake it. I wanted something new, so I left England for New England.

10-30-17  04:01pm - 2610 days #5
biker (0)
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Location: milwaukee, wi
That will all end when the female discovers the effectiveness of pepper spray. Warning Will Robinson

10-31-17  07:07am - 2609 days #6
iknowwazzup (0)
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Posts: 132
Registered: Jan 06, '16
Location: United States
But really who hasn't faked a death to get out of a date? I tried it once, but it got complicated. My cousin called my poor mother and demanded to know why she was the only family member at my fake wake.

10-31-17  07:35am - 2609 days #7
lk2fireone (0)
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Posts: 3,618
Registered: Nov 14, '08
Location: CA
iknowwazzup, DID YOUR COUSIN AT LEAST HAVE PLENTY OF GOOD LIQUOR TO KEEP HER COMPANY, AND TO DROWN HER SORROWS?


I REMEMBER GETTING INTO AN ELEVATOR ONE DAY, YEARS AGO, AND
SUZANNE PLESHETTE (THE ACTRESS FROM THE BOB NEWHART SHOW) WAS INSIDE.
I THINK I SAID I WAS A FAN, AND REALLY ENJOYED HER ACTING.
HER RESPONSE: SHE SAID SHE COULDN'T TALK TO ME, BECAUSE A FRIEND OF HERS HAD JUST DIED.

SOME ACTORS ARE VERY APPROACHABLE, AND WILL TALK TO FANS, OR AT LEAST ACKNOWLEDGE THEM. BUT OTHERS PREFER TO REMAIN PRIVATE.

I ALWAYS WONDERED, AFTERWARD, IF A FRIEND OF HERS HAD REALLY DIED, OR IF IT WAS A POLITE WAY TO SAY BUZZ OFF.

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