Comparative analysis of sensory information in dwarf hamsters (Rodentia, Cricetidae)

An experimental studying the role of sensory information (tactile, visual a nd olfactory) in orientation of three dwarf hamsters (Phodopus campbelli, P h. Sungorus, and Ph. roborovskii) was performed in a chamber with visual de pth. The experiment consisted of four stages: control, vibrissa removal, an osmy and simultaneous vebrissa touch and olfaction deprivation. The most si gnificant differences in behavior were found between Ph. roborovskii and Ph . sungorus and the least ones between the latter and Ph. campbelli. The sex ual dimorphism was the most characteristic of Ph. campbelli, but not of Ph. roborovskii. In visual depth's tests, Ph. sungorus rely on visual informat ion to a greater degree than two other species, and Ph. roborovskii on vibr issa touch. The found differences in behavior of three species are proposed to be due to specific features of their way of life.