Rodent

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.

Long-term isolation stress and its effects on drug response in rodents

This review of the literature has illustrated that isolation stress, especially long-term isolation stress in rats and mice, can affect the growth, behavior, physiological condition, and response to a wide variety of drugs. ... Isolation stress in mice produces abnormal...

Year Published: 1971Animal Type: Mouse, Rat, Rodent

Citation: Baer, H. 1971. Long-term isolation stress and its effects on drug response in rodents. Laboratory Animal Science 21, 341-349.

A record of a friendship between a baboon and a guinea-pig

Year Published: 1972Animal Type: Baboon, Guinea Pig, Nonhuman Primate, Rodent

Citation: Stephen, R. D. 1972. A record of a friendship between a baboon and a guinea-pig . Eastern Cape Naturalist 46, 12.

The effects of familiar visual and olfactory cues on the aggression behaviour of mice

Decreasing the familiarity of the environment and providing flexible avenues of escape lead to reduced levels of inter-male aggression. Greatest levels of aggression were found in cages that had ungergone incomplete cleaning, such as renewal of substrate only.

Year Published: 1973Animal Type: Mouse, Rodent

Citation: Jones, R. B., Nowell, N. W. 1973. The effects of familiar visual and olfactory cues on the aggression behaviour of mice. Physiology and Behavior 10, 221-223.

The preference of rats for free or response-produced food

The majority [but not all] of rats preferred freely available food over food that could be obtained only via lever pressing.

Year Published: 1973Animal Type: Rat, Rodent

Citation: Hothersall, D., Huey, D., Thatcher, K. 1973. The preference of rats for free or response-produced food. Animal Learning and Behavior, 241-243.

Influence of duration, intensity and spectrum of light exposure on sexual maturation of female rats

Light affects sexual maturation.

Year Published: 1973Animal Type: Rat, Rodent

Citation: Hauntzinger, G. M., Piacsek, B. E. 1973. Influence of duration, intensity and spectrum of light exposure on sexual maturation of female rats. Federation Proceedings 32, 213.

Early stimulation of rodents: a critical review of present interpretations

The perceived benefits of early stimulation of rodents is questioned.

Year Published: 1973Animal Type: Rodent

Citation: Daly, M. 1973. Early stimulation of rodents: a critical review of present interpretations. British Journal of Psychology 64, 435-460.

Effects of light intensity, wavelength and quanta on gonads and spleen of the deer-mouse

Spleen and gonad weight as well as growth rate of the whole animal is dependent on light intensity.

Year Published: 1973Animal Type: Other Rodent, Rodent

Citation: Vriend, J., Lauber, J. K. 1973. Effects of light intensity, wavelength and quanta on gonads and spleen of the deer-mouse. Nature 244, 37-38.

Relationship of thyroid and adrenal function to fur-chewing in the chinchilla

The fur-chewing chinchillas showed increased thyroid activity (P < 0·5), increased adrenalcortical function (P < 0·05) and decreased rectal temperature (P < 0·01). This study suggested that increased endocrine activity could be due to the loss of insulation over the...

Year Published: 1973Topics: Abnormal/Problematic BehaviorAnimal Type: Chinchilla, Rodent

Citation: Vanjonack, W. J., Johnson, H. D. 1973. Relationship of thyroid and adrenal function to fur-chewing in the chinchilla. Comparative Biochemistry and Physiology 45, 115-120.

The isolation syndrome in mice

Socially isolated mice differ from group-housed mice not only behaviorally, but also in their immunological responses, hormone levels, brain neurochemistry, learning ability, pain thresholds, and sensitivitiy to drugs.

Year Published: 1973Animal Type: Mouse, Rodent

Citation: Valzelli, L. 1973. The isolation syndrome in mice. Psychopharmacologia 31, 305-320.