Estrus- and steroid-induced changes in circadian rhythms in a diurnal rodent, Octodon degus
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چکیده
منابع مشابه
Estrus- and steroid-induced changes in circadian rhythms in a diurnal rodent, Octodon degus.
Diurnal Octodon degus exhibited marked alterations in activity and temperature in conjunction with the 3 wk estrous cycle when housed in LD12:12 light cycle. On the day of estrus, mean daily activity increases 109%, mean core temperature rises .4 degree C, activity onset is advanced 2 h, and amplitudes of both rhythms decline compared with the 3 days prior to estrus. On the day following estrus...
متن کاملLocomotor and feeding activity rhythms in a light-entrained diurnal rodent, Octodon degus.
The wheel running (WR) and feeding activity (FA) of Octodon degus, a new laboratory rodent characterized by its diurnal habits, were recorded under different lighting conditions. Under 12:12-h light-dark (LD 12:12) cycles, WR activity exhibited a crepuscular pattern with two peaks, M and E, associated with "dawn" and "dusk," respectively. In both cases, an anticipatory activity was patent, sugg...
متن کاملGonadal hormone effects on entrained and free-running circadian activity rhythms in the developing diurnal rodent Octodon degus.
The slowly maturing, long-lived rodent Octodon degus (degu) provides a unique opportunity to examine the development of the circadian system during adolescence. These studies characterize entrained and free-running activity rhythms in gonadally intact and prepubertally gonadectomized male and female degus across the first year of life to clarify the impact of sex and gonadal hormones on the cir...
متن کاملOctodon degus: a diurnal, social, and long-lived rodent.
Octodon degus is a moderate-sized, precocious, but slowly maturing, hystricomorph rodent from central Chile. We have used this species to study a variety of questions about circadian rhythms in a diurnal mammal that readily adapts to most laboratory settings. In collaboration with others, we have found that a number of fundamental features of circadian function differ in this diurnal rodent com...
متن کاملOdor-specific effects on reentrainment following phase advances in the diurnal rodent, Octodon degus.
Reentrainment following phase shifts of the light-dark (LD) cycle is accelerated in Octodon degus in the presence of olfactory social cues (i.e., odors) produced by conspecifics. However, not all odors from conspecifics were effective in facilitating reentrainment after a phase advance. In the current experiments, we examined whether nonanimal odors, odors from another species, or conspecific o...
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ژورنال
عنوان ژورنال: Physiology & Behavior
سال: 1995
ISSN: 0031-9384
DOI: 10.1016/0031-9384(95)00096-2