Publications

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.

Elevation of adrenal Tyrosine hydroxylase and phenylethanolamine-N-methyl transferase by repeated immobilization of rats

Immobilization result in a neuronally dependent elevation of tyrosine hydroxilase in the adrenal medulla.

Year Published: 1970Animal Type: Rat, Rodent

Citation: Kvetnansky, R., Weise, V. K., Kopin, I. 1970. Elevation of adrenal Tyrosine hydroxylase and phenylethanolamine-N-methyl transferase by repeated immobilization of rats. Endocrinology 87, 744-749.

Adrenal and urinary catecholamines in rats during adaption to repeated immobilization stress

Rats subjected to daily immobilization for up to one year still excreted greater amounts of epinephrine than did control animals or animals after their first immobilization. These increases levels of urinary ephinephrine were not accompanied by a decrease in adrenal...

Year Published: 1970Animal Type: Rat, Rodent

Citation: Kvetnansky, R., Mikulaj, L. 1970. Adrenal and urinary catecholamines in rats during adaption to repeated immobilization stress. Endocrinology 87, 738-743.

Stress in sheep resulting from management practices

Separation from conspecifics causes a sharp increase in cortisol concentration.

Year Published: 1970Animal Type: Sheep

Citation: Kilgour, R., de Langen, H. 1970. Stress in sheep resulting from management practices. Proceedings of the New Zealand Society of Animal Production 30, 65-76.

Brain weight increases resulting from environmental enrichment: a directional dominance in mice

Sets of our male and sets of four female C3HxBALB hybrid mice were raised in (1) small standard cages [280 cm2] that were barren, vs.(2) large test cages [1375 cm2] that were barren, vs.(3) large test cages [1375 cm2] that...

Year Published: 1970Animal Type: Mouse, Rodent

Citation: Henderson, N. D. 1970. Brain weight increases resulting from environmental enrichment: a directional dominance in mice. Science 169(947), 776-778.

Studies of brain weight and RNA content after short periods of exposure to environmental complexity

Rats in Environmental Complexity (EC) were compared with litter mates maintained in Impoverished Conditions (IC) for various times. An initial relatively fast onset of the difference between the cerebral weight of the EC and IC rats was observed. This phase...

Year Published: 1970Animal Type: Rat, Rodent

Citation: Ferchmin, P. E., Eterovic, V. A., Caputto, R. 1970. Studies of brain weight and RNA content after short periods of exposure to environmental complexity. Brain Research 20, 49-57.

The management and the pathology of amphibians and reptiles

Year Published: 1970Animal Type: Amphibian, Reptile

Citation: Elkan, E. 1970. The management and the pathology of amphibians and reptiles. Veterinary Record 87, 197-199.

Experimental modification of brain weight and behavior in mice: An enrichment study

The effects of environmental enrichment and isolation on cortical weight and learning ability were measured in mice from lines selectively bred for high and low brain weight and from an unselected control line from the same foundation population. Animals from...

Year Published: 1970Animal Type: Mouse, Rodent

Citation: Collins, R. 1970. Experimental modification of brain weight and behavior in mice: An enrichment study. Psychobiology 3, 145-155.

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.

A comparison of outdoor and indoor housing of rhesus monkeys (Macaca mulatta)

Survival in the outdoor pens averaged 80-90%, which was the same as for the indoor monkeys. Body weight gain in the outdoor monkeys averaged 62% increase, in comparison to 43% gain in the indoor monkeys over the same time period....

Year Published: 1970Animal Type: Macaque, Nonhuman Primate

Citation: Banerjee, B. N., Woodard, G. 1970. A comparison of outdoor and indoor housing of rhesus monkeys (Macaca mulatta). Laboratory Animal Care [Laboratory Animal Science] 20, 80-82.