Rodent

Comparison of bedding material: Habitat preference of pregnant mice and reproductive performance

Pregnant mice exhibit a definite preference for a processed sawdust bedding material as opposed to a commercial deodorized cellulose.

Year Published: 1968Animal Type: Mouse, Rodent

Citation: Iturrian, W. B., Fink, G. B. 1968. Comparison of bedding material: Habitat preference of pregnant mice and reproductive performance. Laboratory Animal Care [Laboratory Animal Science] 18, 160-164.

Effect of noise in the animal house on seizure susceptibility and growth of mice

Year Published: 1968Animal Type: Mouse, Rodent

Citation: Iturrian, W. B., Fink, G. B. 1968. Effect of noise in the animal house on seizure susceptibility and growth of mice. Laboratory Animal Care [Laboratory Animal Science] 18, 557-560.

Comparison of behavioural development in socially isolated and grouped rats

Single-housed males showed reduced activity and a greater incidence of stereotypical tail manipulation [substitute social response?] and pawing with hind legs than males housed in groups.

Year Published: 1967Animal Type: Rat, Rodent

Citation: Baenninger, L. P. 1967. Comparison of behavioural development in socially isolated and grouped rats. Animal Behaviour 15, 312-323.

The effect of corncob bedding on reproductivity and leucine incorporation in mice

Preweaning mortality was increased when the mice were housed on corncob bedding (22%) when compared with pine sawdust bedding (13%).

Year Published: 1969Animal Type: Mouse, Rodent

Citation: Port, C. D., Kaltenbach, J. P. 1969. The effect of corncob bedding on reproductivity and leucine incorporation in mice. Laboratory Animal Care [Laboratory Animal Science] 19, 46-49.

Social factors and resistance to malaria in the mouse: Effects of group vs

Mortality rate of malaria-infected mice was related to number of animals per cage, population sizes ranging from 1 to 20. This was independent of age, sex, and number of animals per cage infected. Individually housed mice died as fast as...

Year Published: 1969Animal Type: Mouse, Rodent

Citation: Plaut, S. M., Ader, R., Friedman, S. B. et al. 1969. Social factors and resistance to malaria in the mouse: Effects of group vs. individual housing on resistance to Plasmodium berghei infection. Psychosomatic Medicine 31, 536-552.

Food hoarding behaviour in the golden hamster (Mesocricetus auratus): effects of body weight loss and hoard-size discrimination

Two experiments investigated some of the factors that influence food hoarding behaviour in the golden hamster (Mesocricetus auratus). In Experiment 1, hamsters given limited access to food failed to increase the amount of food they consumed at each meal. Instead,...

Year Published: 1969Animal Type: Hamster, Rodent

Citation: Phillips, J., Robinson, A., Davey, G. 1969. Food hoarding behaviour in the golden hamster (Mesocricetus auratus): effects of body weight loss and hoard-size discrimination. Quarterly Journal of Experimental Psychology [B] 41, 33-37.

Gregariousness and fear in laboratory rats

In a novel open-field environment rats showed less signs of fear [number of fecal boluses excreted] when tested in pairs versus alone. The presence of a caged companion was less effective than a free-moving companion in reducing fear.

Year Published: 1969Animal Type: Rat, Rodent

Citation: Latane, B. 1969. Gregariousness and fear in laboratory rats. Journal of Experimental Social Psychology 5, 61-69.

Paper as a positive reinforcer for acquisition of a barpress response by the golden hamster

A hamster will readily work in order to get access to nesting material.

Year Published: 1969Animal Type: Hamster, Rodent

Citation: Jansen, P. E., Goodman, E. D., Jowaisas, D. et al. 1969. Paper as a positive reinforcer for acquisition of a barpress response by the golden hamster. Psychonomic Science 16, 113-114.

Effects of postweaning enrichment and isolation upon emotionality and brain weight in the mouse

At weaning (21 days) 60 male C57BL/6J mice were placed into isolation cages while 60 others were grouped in enriched environments. Fifteen days later half of each group was shifted to the opposite housing condition while the other half continued...

Year Published: 1969Animal Type: Mouse, Rodent

Citation: Denenberg, V. H., Wehmer, F., Werboff, J. et al. 1969. Effects of postweaning enrichment and isolation upon emotionality and brain weight in the mouse. Physiology and Behavior 4, 403-406.

Rat brain: Effects of environmental enrichment on wet and dry weights

Wet weight of rat cerebral cortex was increased by exposure to an enriched environment [10 or 12 animals in large cage with toys], as compared with standard colony [2 or 3 animals in small cage] or impoverished conditions [single-housing].

Year Published: 1969Animal Type: Rat, Rodent

Citation: Bennett, E. L., Rosenzweig, M. R., Diamond, M. C. 1969. Rat brain: Effects of environmental enrichment on wet and dry weights. Science 163, 825-826.