February 2, 2023

Male spiders catapult away from partners to avoid sexual cannibalism

3 min read

New research has revealed that Floponella prominin are social spiders, meaning they live in groups, but soon after being with them, the male orchid has to jump fast to avoid being eaten by his female partner.

Little spiders live in communities up to 215 and form cobwebs, According to a study Published in the journal Current Biology.

According to Xichang Zhang, an associate professor at Hubei University in China and author of the study, they make their home in the forests of central China in places like Hubei, Hunan and Jiangxi provinces.

Other species of spiders, such as the redback, practice sexual disobedience, but this is the first report of a spider species that moves very fast to avoid being eaten by its mate.

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The researchers examined 155 successful meetings in a laboratory setting. In 152 of the mix, the male spiders managed to get to safety, while the three male spiders did not eat their mates.

Zhang said of the three spiders that did not jump to safety, “their ability to sense danger is low, or they are tired during mating, or just can’t perform catapults.”

Using a high-speed camera to capture acrobatic movements, the scientists determined that the male spiders pressed their forelegs against the substance, then pushed faster to release the hydraulic pressure and reached 34.5 inches per second. Reached a speed of 88 cm per second. To escape

According to research, orchids can jump up to 469 per second to avoid sexual predation.

“I think it’s mainly to avoid women, catapulting and walking makes it harder for women to catch up,” Zhang said.

If the researchers removed one or both front legs, the male spiders presented potential female partners but they made no attempt to mate, meaning both legs were necessary for a successful mating.

When Zhang’s team prevented some male spiders from escaping, all of them were eaten by their female partners, which led researchers to believe that catapulting is a necessary survival skill.

Female spiders choose sperm.

Zhang said the mating ends with the female spider, and once the male partner senses his counterpart’s aggression, he jumps to safety.

Zhang said it is not known why female spiders try to eat male spiders after mating, but it could be a test of sexual selection to determine if males are reproductive partners, Zhang said. ۔

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Unlike mammals, the female spider has a sac in its reproductive tract called a spermathika that holds sperm and prevents it from attaching to the egg. Zhang said that after inserting a man’s sperm into his body, he keeps it there until he decides whether to use it or not.

She said that if she wanted to use it, she would squeeze the sperm from her spermatozoa to fertilize her egg. Zhang added that if she did not want to, she could squeeze the sperm from her body or change the pH level of the spermatheca to kill the sperm.

“Women can accept male sperm that can catapult but eliminate male sperms that can be easily caught through it,” he said.

Hanging there

Zhang said that in sectarian nets, the female Feluponella celebrities rarely emerge, while their male counterparts go to other nets for mating and mating with the female spider six times before moving on to another. Can jol.

Prior to mating, the male spiders were attached to a protective line of silk thread on the edge of the female partner’s web and used it to help them escape.

According to the research, when the researchers cut the safety line during mating, they found that the males were still moving away, but they would fall to the ground instead of climbing the safety line.

Zhang said male spiders often repeat the mixing behavior, jumping and then crawling back to the same female, Zhang said.

In the future, Zhang would like to investigate whether there is a link between the ability of male Floponella prominence to catapult and its ability to reproduce successfully..

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