Categorized | Animals

Spider studies

Adanson jumping spider

Jumping spiders falls under the category of invertebrates. For many years scientist was really amazed as how spiders manage a sophisticated nervous system with their hunting behavior. A detailed research was done on Adanson
jumping spiders who fall in the category of eight eyed spiders. Four eyes are present of the face of the spider and have the sharpest vision. The jumping spiders have four distinct layers of light sensitive at the back of the eyes but the uses of these four light sensitive tissues had not been found so far. It is found that if any object falls on the base layer that object cannot be seen on the next layer up and the object becomes blurrier.

Detailed analysis on spiders:

A detailed study was done by a group of scientist from Osaka City University in Japan. In this research the study was conducted by using gene expression, electrophysiology and other method to give the conclusion that two bottom layers of jumping spiders are very sensitive to green light. The other two layers also responded weekly to red light. So finally they concluded that even the bright color object like red will appear like dim green on their retina. These colors of light are helpful to them in different varies when it come to grabbing of insects such as flies.

In a green light only one single bound can get them their prey whereas in case of red light it becomes difficult for them to snatch the flies because according to the study made on them they are unable to cover the required distance in their single jump. The brains are small when they are compared other insects such as flies and along with their eyes are really helpful to them in getting them the approximate measurements of the distance.



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