Rodent

Surface choice and behavior in adult Mongolian gerbils

Both males and females clearly chose to be most frequently on the sand, follwed by the wood chip bedding material.

Year Published: 1978Animal Type: Gerbil, Rodent

Citation: Pettijohn, T. F., Barkes, B. M. 1978. Surface choice and behavior in adult Mongolian gerbils. The Psychological Record 28, 299-303.

Effect of handling and forced immobilization on rat plasma levels of epinephrine, norepinephrine, and dopamine-beta-hydroxylase

Forced immobilization of rats triggers activation of adrenal-medullary discharge of ephinephrine (EPI) [ and adrenocortical secretion of cortisol] and sympathetic neuronal release of norepinephrine (NE). Plasma levels of EPI reach peak values, which are about 40-fold greater than undisturbed rats,...

Year Published: 1978Animal Type: Rat, Rodent

Citation: Kvetnansky, R., Sun, C. L., Lake, C. R. et al. 1978. Effect of handling and forced immobilization on rat plasma levels of epinephrine, norepinephrine, and dopamine-beta-hydroxylase. Endocrinology 103, 1868-1874.

Reversibility of reinforcement between eating and running by schedule changes: a comparison of hypotheses and models

Rats increase feeding time if wheel-running is contingent.

Year Published: 1979Animal Type: Rat, Rodent

Citation: Timberlake, W., Wozny, M. 1979. Reversibility of reinforcement between eating and running by schedule changes: a comparison of hypotheses and models. Animal Learning and Behavior 7, 461-469.

Lighting in the animal environment

What we basically have done to date is to provide lighting suitable to our needs and assumed it was all right for the animal. [p. 441] Light intensities in stacked cages vary substantially.

Year Published: 1980Animal Type: Rat, Rodent

Citation: Bellhorn, R. W. 1980. Lighting in the animal environment. Laboratory Animal Science 30, 440-450.

Assessing laboratory evidence for neoplastic activity

Mortality and tumor incidence in corcinogenesis experiments differ between mice caged in the top vs. bottom of the rack.

Year Published: 1980Topics: Housing, Husbandry & ManagementAnimal Type: Mouse, Rodent

Citation: Mantel, N. 1980. Assessing laboratory evidence for neoplastic activity. Biometics 36, 381-399.

Discrimination of odours from stressed rats by non-stressed rats

Placing a rat into a new cage triggers release of corticosterones. This endocrine response is augmented if the new environment is one in which other rats had previously been subjected to stress.

Year Published: 1980Topics: Husbandry & ManagementAnimal Type: Rat, Rodent

Citation: Mackay-Sim, A., Laing, D. G. 1980. Discrimination of odours from stressed rats by non-stressed rats. Physiology and Behavior 24, 699-704.

Specific hormonal and neurochemical responses to different stressors

The neuroendocrine and neurochemical responses of rats to 5 min of cold exposure versus 5 min of forced immobilization were determined and compared. We found that plasma hormones and brain neurochemical systems responded differently to the two different stressors. Plasma...

Year Published: 1980Topics: RestraintAnimal Type: Rat, Rodent

Citation: Lenox, R. H., Kant, G. J., Sessions, G. R. et al. 1980. Specific hormonal and neurochemical responses to different stressors. Neuroendocrinology 30(5), 300-308.

Energetics of mice in stable and unstable social conditions: evidence of an air-borne factor affecting metabolism

Male mice kept individually have a 15% higher metabolic rate than mice kept in stable same gender pairs.

Year Published: 1980Topics: Social Housing & CompanionshipAnimal Type: Mouse, Rodent

Citation: Herreid, C. F., Schlenker, E. H. 1980. Energetics of mice in stable and unstable social conditions: evidence of an air-borne factor affecting metabolism. Animal Behaviour 28, 20-28.

Paradoxical sleep and memory (I): Selective alterations following enriched and impoverished environmental rearing

Mice were reared in either enriched (EE), social control, (SE), or impoverished (IE) environments for 30 days. Environmental enrichment results in a significant and selective increase in paradoxical sleep (PS, or REM sleep) and also enhances recall of a multiple-trial,...

Year Published: 1980Topics: Environmental Enrichment, Social Housing & CompanionshipAnimal Type: Mouse, Rodent

Citation: Gutwein, B. M., Fishbein, W. 1980. Paradoxical sleep and memory (I): Selective alterations following enriched and impoverished environmental rearing. Brain Research Bulletin 5(1), 9-12.

Stress response of rats to handling and experimental procedures

Serum corticosterone levels increased significantly within four minutes, reached a peak at 15 minutes and were back to control values 60 minutes after cage displacement. Prolactin, TSH, LH and FSH serum concentrations were also affected by cage movement. The results...

Year Published: 1980Topics: HandlingAnimal Type: Rat, Rodent

Citation: Gartner, K., Buttner, D., Dohler, R. et al. 1980. Stress response of rats to handling and experimental procedures. Laboratory Animals 14, 267-274.