Rodent

Noise as an environmental problem

Audiogenic seizures, changes in parameters of the stress syndrome, and disturbance of acoustic communication in rodents are discussed as possible harmful effects of noise and evaluated in regard to standards published in Germany for man. These standards are insufficient to...

Year Published: 1974Animal Type: Rodent

Citation: Pfaff, J. 1974. Noise as an environmental problem. Laboratory Animals 8, 347-354.

Bedding preferences of mice over long-term confinement

Mice prefer aspen shaving bedding.

Year Published: 1974Animal Type: Mouse, Rodent

Citation: Mulder, J. B. 1974. Bedding preferences of mice over long-term confinement. Laboratory Animal Digest 9, 54-56.

Bedding selection by rats

Rats showed a preference for aspen shaving bedding

Year Published: 1974Animal Type: Rat, Rodent

Citation: Mulder, J. B. 1974. Bedding selection by rats. Laboratory Animal Digest 9, 27-30.

The effects of acute stress on the secretion of LH, FSH, prolactin and growth hormone in the normal male rat, with comments on their statistical evaluation

Restraint stress is associated with a significant rise in plasma prolactin and LH levels.

Year Published: 1974Animal Type: Rat, Rodent

Citation: Krulich, L., Hefco, E., Illner, P. et al. 1974. The effects of acute stress on the secretion of LH, FSH, prolactin and growth hormone in the normal male rat, with comments on their statistical evaluation. Neuroendocrinology 16, 291-311.

Corticosterone, prolactin, and growth hormone responses to handling and new environment in the rat

The effects of handling and novel environment on cortisol, prolactin and growth hormone were assessed and different control mechanisms discussed. Handling and novelty of the environment are powerful stimuli to activate the pituitary-adrenal axis.

Year Published: 1974Animal Type: Rat, Rodent

Citation: Brown, G. M., Martin, J. B. 1974. Corticosterone, prolactin, and growth hormone responses to handling and new environment in the rat. Psychosomatic Medicine 36, 241-247.

Effects of acute stress on serum LH and prolactin in intact, castrate and dexamethasone-treated male rats

Placing rats into transfer boxes and moving them to another room triggers a significant rise in plasma prolactin and LH.

Year Published: 1975Animal Type: Rat, Rodent

Citation: Euker, J. S., Meites, J., Riegle, G. D. 1975. Effects of acute stress on serum LH and prolactin in intact, castrate and dexamethasone-treated male rats. Endocrinology 96, 85-92.

The rat’s long-term preference for complexity in its environment

Single-housed rats demonstrated a marked preference for high complexity during 'day' conditions probably because spatial complexity elicited shelter/relaxation responses. Complexity seemed to reduce the arousal level of the subject. .... The most attractive compartment [of the test cage], in terms...

Year Published: 1975Animal Type: Rat, Rodent

Citation: Denny, M. S. 1975. The rat's long-term preference for complexity in its environment. Animal Learning and Behavior 3, 245-249.

The importance of laboratory lighting as an experimental variable

The importance of light and illumination as extraneous variable is discussed. My suggestion is that the cage conditions are too crowded in our present racks, and there should be the same lighting for all cages in the bottom shelf as...

Year Published: 1974Animal Type: Rodent

Citation: Ott, J. N. 1974. The importance of laboratory lighting as an experimental variable. In: Environmental Variables in Animal Experimentation . Magalhaes, H. (ed), 39-57. Bucknell University, Lewisburg, PA.

Self-sustaining activities and reinforcement in the nest building behaviour of mice

Mice will readily work in order to get nesting material. It is concluded that gathering is at least to some extent authonomously controlled, and that it is a weak positive reinforcer.

Year Published: 1975Animal Type: Mouse, Rodent

Citation: Roper, T. J. 1975. Self-sustaining activities and reinforcement in the nest building behaviour of mice. Behaviour 59, 40-57.

Nest material and food as reinforcers for fixed-ratio responding in mice

Mice will readily work in order to get nesting material.

Year Published: 1975Animal Type: Mouse, Rodent

Citation: Roper, T. J. 1975. Nest material and food as reinforcers for fixed-ratio responding in mice. Learning and Motivation 6, 327-343.