This result coincides with the observation that mosquitoes do not randomly choose the water for oviposition, but prefer cloudy, dark waters with as many nutrients as possible. Dark areas return the light polarized to a higher percentage than bright areas because they only reflect waves with a certain orientation but absorb others.
Mosquitoes can perceive this directional light and thus explore suitable oviposition sites, the researchers explain. This is also supported by the results of a second experiment, in which the researchers used different cloudy water. Again, the female mosquitoes preferred the darkest water for oviposition, as this returned the highest percentage of polarized light, making it the most nutritious nursery for the female.
Mollusks are a common mosquito family closely related to the mosquitoes. The name derives from the convulsions that the animals perform in peace. Although these insects do not sting, they spread the bacterium Vibrio cholerae, which is dangerous for humans and can be absorbed through contaminated drinking water. displayAmit Lerner (Hebrew University Jerusalem, Israel) et al .: Journal on Experimental Biology, Vol. 211, p. 3536 ddp / science.de? Stefan Pröll