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1. Light-dark and societal synchronization of respiratory and motor activities in laboratory mice, rats, guinea-pigs and quails

Author

Maurice Stupfel, Davergne M, A. Perramon, J.-L. Monvoisin, Huguette Thierry, J. Da Silva, Véronique Gourlet, and C. Lemercerre

Subjects
Synchronization (alternating current), Physiology, General Medicine, Circadian rhythm, Respiratory system, Biology, Locomotor activity, Ultradian rhythm
Abstract

1. 1. In small adult laboratory vertebrates, kept under controlled environmental conditions: LD12:12 (L = 100 lx), temperature: 20–21°C, humidity: 60–90%, food and water ad libitum, continuous respiratory and displacement activity recordings, performed on isolated, separated and 5–10 grouped animals, in alternating light and dark (L-D) or in constant illumination, show statistically significant different circadian and ultradian rhythms. 2. 2. Comparative studies show a strong respiratory and locomotor activity synchronization by interindividual contacts in mice, and by L-D in quails. 3. 3. In rats, interindividual synchronization is as important as L-D synchronization. 4. 4. An ultradian societal rhythmicity has been demonstrated in guinea-pigs.

Published
1981
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3. [Ultradian (between 5 and 70 minutes) respiratory (VO2, VCO2) rhythms of 4 small vertebrates used in biomedical research].

Author

Stupfel M, Davergne M, Perramon A, Lemercerre C, and Gourlet V

Subjects
Animals, Displacement, Psychological, Drinking Behavior physiology, Feeding Behavior physiology, Female, Humans, Male, Periodicity, Coturnix physiology, Guinea Pigs physiology, Mice physiology, Quail physiology, Rats physiology, Respiration
Abstract

Four laboratory Vertebrate species with a predominant activity, either diurnal (Coturnix coturnix japonica), nocturnal (Rattus norvegicus, Mus musculus), or equivocal (Cavia porcellus), present, in usual housing conditions (temperature 20 degrees C, hygrometry 60-70%, acoustical background 70 dB, LD12:12 lighting L = 150 lx), food and water ad libitum, ultradian respiratory (VO2, VCO2) rhythms of short periods. The frequencies of these rhythms are independent of food intake and activity variations correlated to the lighting phase and regimen (LD, LL). The period (tau) of these ultradian respiratory rhythms is in isolated animals, between 5 and 70 min., according to the species studied. Grouping of several individuals of a same species, in a ventilated chamber, modifies the statistical distribution of the periods of the ultradian rhythms, but does not change the interspecies differences.

Published
1979

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