Rodent

Effects of enriched environment upon hoarding

95 mice from 2 inbred strains were exposed to a postweaning enriched environment or to a standard environment. The design allowed assessment of effects due to environment, genotype, and genotype * environment interactions. Environment enrichment differentially affected hoarding performance in...

Year Published: 1968Topics: Environmental EnrichmentAnimal Type: Mouse, Rodent

Citation: Manosevitz, M., Campenot, R. B., Swencionis, C. F. 1968. Effects of enriched environment upon hoarding. Journal of Comparative and Physiological Psychology 66, 319-324.

Housing, care, and breeding

Species-appropriate handling procedures are described/demonstrated.

Year Published: 1968Animal Type: Hamster, Rodent

Citation: Magalhaes, H. 1968. Housing, care, and breeding . In: The Golden Hamster - Its Biology and Use in Medical Research. Hoffman, R. A., Robinson, P. F., Magalhaes, H. (eds), 15-23. Iowa State University Press, Ames, Iowa.

Social and nonsocial attraction in rats

Single rats show a reduction of fear in a strange environment when another - though anesthetized - rat is present.

Year Published: 1968Animal Type: Rat, Rodent

Citation: Latane, B., Glass, D. 1968. Social and nonsocial attraction in rats. Journal of Personality and Social Psychology 9, 142-146.

Effect of differential environmental enrichment on brain weight and on acetylcholinesterase and cholinesterase activities in mice

Two inbred strains of mice were used in a replication of the Berkeley rat studies on the cerebral effects of differential environmental enrichment. Those raised in a complex environment and given extensive maze training showed significantly heavier brain weights and...

Year Published: 1968Topics: Environmental EnrichmentAnimal Type: Mouse, Rodent

Citation: La Torre, J. C. 1968. Effect of differential environmental enrichment on brain weight and on acetylcholinesterase and cholinesterase activities in mice. Experimental Neurology 22, 493-503.

Rats’ preference for earned in comparison with free food

When work demands are not too high, rats prefer earned food to free food.

Year Published: 1970Animal Type: Rat, Rodent

Citation: Carder, B., Berkowitz, K. 1970. Rats' preference for earned in comparison with free food. Science 167, 1273-1274.

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.

Effects of oestrogen and progesterone on nest building in the golden hamster

Nest building in golden hamsters was measured by daily removal and weighing of nests built with straw pulled in from a supply outside each cage. Females used increasing amounts of straw as pregnancy advanced. Similar increases were seen in spayed...

Year Published: 1969Animal Type: Hamster, Rodent

Citation: Richards, M. 1969. Effects of oestrogen and progesterone on nest building in the golden hamster. Animal Behaviour 17, 356-361.