The role of random movements in the orientation of Porcellio scaber to light.

Open Access
Publisher Website
Google Scholar
Abstract
Examined the tropic movements of orientation, in Porcellio scaber (a species of sow-bug). Varying number of Ss were involved. In the 1st method, the sensitive individuals were exposed suddenly to lateral illumination, the direction, with reference to the light of the first movement of the organism out of its course was recorded. The 1st movement was found to be away from the light. The 2nd method showed that Ss responded more readily to light coming from behind, than from the front of the S. Porcellio is easily guided in any desired direction by changing the direction of light falling on it from above. The lack of consistency in the direction of the S was attributed to the relatively large angular diameter of the source of light, and partly to the inequalities in the sensitiveness of the 2 eyes of certain Ss to light. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

This publication has 0 references indexed in Scilit: