Rodent

Bedding preferences of pregnant laboratory-reared mice

Pregnant mice invariably preferred aspen shaving bedding over nine other commercially available bedding materials.

Year Published: 1975Animal Type: Mouse, Rodent

Citation: Mulder, J. B. 1975. Bedding preferences of pregnant laboratory-reared mice. Behavior Research Methods and Instrumentation 7, 21-22.

Cage size as a factor in environmental enrichment

Cage size significantly affected 38-day gross body weight, open-field activity and defecation, running-wheel activity, exploration, and water consumption. .. Rearing in large cages, either wire or Plexiglas, appears to reduce emotionality... The results of this experiment indicate that cage size...

Year Published: 1975Topics: Environmental Enrichment, HousingAnimal Type: Mouse, Rodent

Citation: Manosevitz, M., Pryor, J. B. 1975. Cage size as a factor in environmental enrichment. Journal of Comparative and Physiological Psychology 89, 648-654.

Deleterious effect of infantile stimulation in the golden hamster

Unlike in rats, early handling makes hamsters timid and wild when they are adults.

Year Published: 1975Animal Type: Hamster, Rodent

Citation: Lawlor, M. M., Wells, P. A., Weinberg, J. 1975. Deleterious effect of infantile stimulation in the golden hamster. Experimental Brain Research 23(Supplement), 120 (Abstract).

Effects of clean and soiled sawdust substrates and of different urine types upon aggressive behaviour in male mice

Greatest levels of aggression were found in cages that had ungergone incomplete cleaning, such as renewal of substrate only.

Year Published: 1975Animal Type: Mouse, Rodent

Citation: Jones, R. B., Nowell, N. W. 1975. Effects of clean and soiled sawdust substrates and of different urine types upon aggressive behaviour in male mice. Aggressive Behavior 1, 111-121.

Opportunity for interaction as reinforcer in a T-maze

Used 2 forms of handling as reinforcement in a 'T' maze for 34 male Sprague-Dawley albino rats. In a 12-day experiment, those receiving gentling learned to avoid reinforcement, while those receiving fondling learned to obtain it. In a 6-day follow-up,...

Year Published: 1976Topics: Handling, Social Housing & CompanionshipAnimal Type: Rat, Rodent

Citation: Werner, C., Anderson, D. F. 1976. Opportunity for interaction as reinforcer in a T-maze. Personality & Social Psychology Bulletin 2, 166-169.

Attenuation of gastric lesions by psychological aspect of aggression in rats

In a study with 80 male albino rats, Ss that fought with each other in response to electric shock showed reduced gastric lesions in comparison with Ss that received the same shocks alone so that fighting behavior did not occur....

Year Published: 1976Animal Type: Rat, Rodent

Citation: Weiss, J. M., Pohorecky, L. A., Salman, S. et al. 1976. Attenuation of gastric lesions by psychological aspect of aggression in rats. Journal of Comparative and Physiological Psychology 90, 252-259.

Sex differences in circadian wheel running rhythms in the Mongolian gerbil

Gerbils run up to 8 km/24 h in running wheels.

Year Published: 1976Animal Type: Gerbil, Rodent

Citation: Roper, T. J. 1976. Sex differences in circadian wheel running rhythms in the Mongolian gerbil. Physiology and Behavior 17, 549-551.

Adaptation of the glucocorticosterone response to novelty

Novelty of the environment is a powerful stimulus to activate the pituitary-adrenal axis. With respect to adaptation of the response to the novel environment, the present findings suggest that more than 2 hr and up to 4 hr is required...

Year Published: 1976Animal Type: Rat, Rodent

Citation: Pfister, H. P., King, M. G. 1976. Adaptation of the glucocorticosterone response to novelty. Physiology and Behavior 17, 43-46.

Incidence of pup mortality in the rat with particular reference to nesting material, maternal age and parity

Better breeding results were obtained when animals had access to woodwool instead of paper tissue as nesting materials. With paper tissues for nesting purposes 60% of the young were lost compared with 18% with woodwool.

Year Published: 1976Animal Type: Rat, Rodent

Citation: Norris, M. L., Adams, C. E. 1976. Incidence of pup mortality in the rat with particular reference to nesting material, maternal age and parity. Laboratory Animals 10, 165-169.

Environmental enrichment and crowding: Behavioral and hormonal effects

Environmental enrichment and available refuge did ameliorate the usual hormonal responses to crowding. [p. 740]

Year Published: 1976Topics: Environmental Enrichment, Stocking DensityAnimal Type: Gerbil, Rodent

Citation: Hull, E. M., Kastaniotis, C., L'Hommedieu, G. et al. 1976. Environmental enrichment and crowding: Behavioral and hormonal effects. Physiology and Behavior 17, 735-741.