Publications

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.

Social responding in dogs: heart rate changes to a person

This paper reports the variable conditional effects of a person on the heart rate of nine mongrel dogs. There were three experimental procedures: person present and playing a passive role, person present and playing an active role (petting the dog),...

Year Published: 1969Animal Type: Dog

Citation: Lynch, J. J., McCarthy, J. F. 1969. Social responding in dogs: heart rate changes to a person. Psychophysiology 5(4), 389-393.

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.

Effects of visual complexity during rearing on chicks’ reactions to environmental change

Reaction to novel change was less in birds whose rearing conditions had been made more complex by the presence of a moving object or mirror.

Year Published: 1969Animal Type: Bird, Chicken

Citation: Broom, D. M. 1969. Effects of visual complexity during rearing on chicks' reactions to environmental change. Animal Behaviour 17, 773-780.

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.

The Life of Reptiles (Volumes 1 & 2)

Year Published: 1969Animal Type: Reptile

Citation: Bellairs, A. 1969. The Life of Reptiles (Volumes 1 & 2). Weidenfeld and Nicolson, London, UK.

Safety procedures for handling monkeys

Photographic demonstration of the traditional enforced injection method. All monkeys are dangerous [p. 207]. ... Monkeys should not be handled in the fully-conscious state [p. 211].

Year Published: 1969Animal Type: Nonhuman Primate

Citation: Ackerley, E. T., Stones, P. B. 1969. Safety procedures for handling monkeys. Laboratory Animal Handbooks 4, 207-211.