Home pageVietnam web designThe insects

Insects just enough fear death 

The Canadian researchers said that, in the presence of a predator can cause enough stress to kill prey, even when predators do not actually catch and eat their prey, according to news agency UPI.

Expert Group of the University of Toronto said their findings could apply to all organisms facing a certain stress level.

"How prey respond to the fear of being eaten is an important topic in ecology, and we already know a lot about these reactions affect the interaction between prey and hunt animals bait like "evolutionary biologist Locke Rowe said.

  In an experiment, newborn dragonfly larvae reared in tanks. Some are kept separate, and the rest are kept together in tanks where they can see and smell the scent of predators, though animals can not really eat them.

"What we found is surprising, many dragonflies died when predators shared their habitat with," Mr. Rowe said.

Larvae face predatory fish or insects have lower survival rates 2.5 to 4.3 times higher than larvae not in such circumstances.

And then 11% of fish larvae were faced with death when they try to transform into the adult stage, compared to only 2% in the larvae of fish-free environments.

"We have a new birth of dragonflies to go through metamorphosis stages to become adults, and found that the child grew up around predators likely failed to complete the process transform higher, and often died while undergoing this process, "he stressed.

Others news
  1. Homoptera
  2. Fossils and evolution of insects
  3. Ants - insects oldest living planet
Here\'s my Clover weevil. Obviously a very old man, he\'s completely bald.   We can not determine at this yet, so for the time being, we can only show you the image without further ...
In armor is just a slit to allow live animals: the mouth, through which food is absorbed, the excretion hole in the back to get rid of useless things and trachea, open a small, usually on both sides ...
Ant species baby small is so but pulse around them always have very many dangerous stalking, such as species Caterpillars blue, a threat of species of ants! Caterpillars green Larvae of ...