Rat

Colonic temperature of rats during handling

When rats are gently handled, their core temperature rises as a stress response.

Year Published: 1970Animal Type: Rat, Rodent

Citation: Briese, E., deQuijada, M. G. 1970. Colonic temperature of rats during handling. Acta Physiologica Latinoamerica 20, 97-102.

Animals respond for food in the presence of free food

Pigeons pecked a response disk to gain access to grain rewards while identical grain was freely available ... Similarly, rats pressed a lever for food pellets while free pellets were present. ... The act of producing food can serve as...

Year Published: 1969Animal Type: All/General, Bird, Other Bird, Rat, Rodent

Citation: Neuringer, A. J. 1969. Animals respond for food in the presence of free food. Science 166, 399-401.

Conditions producing psychogenic polydipsia in animals

Psychogenic polydipsia is reported in rats.

Year Published: 1969Animal Type: Rat, Rodent

Citation: Falk, J. L. 1969. Conditions producing psychogenic polydipsia in animals. Annals of the New York Academy of Sciences 157, 569-593.

The effect of light intensity on the breeding and development of rats and golden hamsters

It was noticed that animals subjected to an illumination of 2000 lux were tame and playful with handling, while those at lower light intensities resisted handling and tried to bite when vaginal smear was taken. ... The weight of some...

Year Published: 1969Animal Type: Hamster, Rat, Rodent

Citation: Weihe, W. H., Schidlow, J., Strittmatter, J. 1969. The effect of light intensity on the breeding and development of rats and golden hamsters. International Journal of Biometeorology 13, 69-79.

Environmental influence on brain and behavior of year-old rats

The beneficial effects of environmental enrichment are not restricted to a brief cricial period in development. Positive effects occur also in rats aged 300 days when first placed in an enriched environment.

Year Published: 1971Animal Type: Rat, Rodent

Citation: Riege, W. H. 1971. Environmental influence on brain and behavior of year-old rats. Developmental Psychobiology 4, 157-167.

Reinforcing properties of spontaneous activity in the rat

Required 21 male sprague-dawley rats to bar press on an ascending sequence of fixed-ratio requirements in order to run in either a voluntary treadmill or a braked running wheel. In both testing situations the duration of the burst of running...

Year Published: 1971Animal Type: Rat, Rodent

Citation: Collier, G. H., Hirsch, E. 1971. Reinforcing properties of spontaneous activity in the rat. Journal of Comparative and Physiological Psychology 77, 155-160.

Physiological responses to blood collection methods in rats

Plasma glucose levels are related to the length of handling time during blood collection.

Year Published: 1971Animal Type: Rat, Rodent

Citation: Besch, E. L., Chou, B. J. 1971. Physiological responses to blood collection methods in rats. Proceedings of the Society for Experimental Biology and Medicine 138, 1019-1021.

Circadian alteration of audiogenic seizure susceptibility in rats

Genetically determined audiogenic seizure susceptibility in Wistar albino rats showed distinct rhythmicity with its increase and decrease during night and day, respectively. This rhythmicity is apparently regulated by light since its trend can be readily reversed by artificially reversing the...

Year Published: 1970Animal Type: Rat, Rodent

Citation: Wada, J. A., Asakura, T. 1970. Circadian alteration of audiogenic seizure susceptibility in rats. Experimental Neurology 29, 211-214.

Nesting material as a reinforcer for operant behavior in the rat

Rats will readily work for the acquisition of nesting material. Paper strips serves as an adequate reinforcer. .. Prior to parturiation, only a small daily nest was built and barpressing occurred only in the dark part of the lighting cycle....

Year Published: 1970Animal Type: Rat, Rodent

Citation: Oley, N. N., Slotnick, B. M. 1970. Nesting material as a reinforcer for operant behavior in the rat. Psychonomic Science 21, 41-43.

Effects of environmental enrichment and impoverishment on rat cerebral cortex

The first part of this paper deals with rat brain anatomy as affected by variations of starting age and of duration of exposure to enriched (complex) or impoverished (restricted) environmental conditions. Cerebral cortical depth measurements and weights of brain samples...

Year Published: 1972Topics: Environmental EnrichmentAnimal Type: Rat, Rodent

Citation: Diamond, M. C., Rosenzweig, M. R., Bennett, E. L. et al. 1972. Effects of environmental enrichment and impoverishment on rat cerebral cortex. Journal of Neurobiology 3, 47-64.