Rodent

Behavior adaptation to fixed-interval and fixed-time food delivery in golden hamster

Food-deprived golden hamsters in a large enclosure received food every 30 sec contingent on lever pressing, or free while their behavior was continuously recorded in terms of an exhaustive classification of motor patterns. As with other species in other situations,...

Year Published: 1977Animal Type: Hamster, Rodent

Citation: Anderson, M. C., Shettleworth, S. T. 1977. Behavior adaptation to fixed-interval and fixed-time food delivery in golden hamster. Journal of the Experimental Analysis of Behavior 25, 33-49.

The behaviour of Mongolian gerbils in a semi-natural environment with special reference to ventral marking, dominance and sociability

Gerbils do not show stereotyped bar-gnawing in cages which are provided with a lid [dark areas in cage].

Year Published: 1977Animal Type: Gerbil, Rodent

Citation: Roper, T. J., Polioudakis, E. 1977. The behaviour of Mongolian gerbils in a semi-natural environment with special reference to ventral marking, dominance and sociability. Behaviour 61, 207-237.

Genetics, Environment and Intelligence

Social grouping versus isolation aids subsequent learning and retention. ... Enriched-experienced rats perform better than colony - or impoverished-experience rats.

Year Published: 1977Animal Type: Rat, Rodent

Citation: Oliverio, A. 1977. Genetics, Environment and Intelligence. Elsevier, Amsterdam, Netherlands.

Behavioral persistence following switchovers between environmental enrichment and impoverishment in mice

Early life experiences in a particular level of environmental complexity need not permanently modify behavior.

Year Published: 1978Animal Type: Mouse, Rodent

Citation: Klippel, J. A. 1978. Behavioral persistence following switchovers between environmental enrichment and impoverishment in mice. Developmental Psychobiology 11, 541-557.

Influence of visible light on organ weights of mice

Light affected the weights of the pituitary, adrenals, kidneys and prostate in male mice and the adrenals, thyroid and pineal glands in females. The weight of adrenal glands of both males and females were most sensitive to changes in lighting.

Year Published: 1979Animal Type: Mouse, Rodent

Citation: Saltarelli, C. G., Coppola, C. P. 1979. Influence of visible light on organ weights of mice. Laboratory Animal Science 29, 319-322.

Effects of prior housing on endocrine responses to differential caging in male TO-strain mice

The results support the suggestion that changing the housing condition of mice [e.g., from single-housing to pair-housing and vice versa] is stressful as measured in elevated corticosterone levels.... The influence of re-housing was sufficient to produce higher basal corticosteroide titers...

Year Published: 1979Animal Type: Mouse, Rodent

Citation: Benton, D., Brain, P. F., Goldsmith, J. F. 1979. Effects of prior housing on endocrine responses to differential caging in male TO-strain mice. Physiological Psychology 7, 89-92.

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.