Radioactive marking in the study of locomotion in small mammals.

摘要: Abstract A technique is described for continuous recording of locomotor activity in small mammals. radioactive source (Ag 110 m ), enclosed a drop resin, fixed to the animal's cranium. The experimental chamber Plexiglas cylinder center which radiation detector, whose electrical signals are integrated and recorded on moving paper. Each displacement animal gives rise variation intensity thus amplitude. Locomotor quantified by counting number significant displacements unit time. sufficiently sensitive bring out differences between two strains mice. In rat, effects tryptophan deprivation time spent feeding have been studied. applicability this method very wide, because it allows measurement movement any air, water, or dry land. It at moment even being applied study vertical migration plankton.