title: [Testicular activity of the ferret kept for over 4 years under permanent light and constant temperature].
abstract: Five male ferrets, aged 2 months, were kept in constant light (4-5 lx) and temperature (15 +/- 1 degree C) from July 1979 to September 1983. Under these experimental conditions, the testicular size displayed spontaneous variations. Four cycles, characterized by a marked testicular enlargement followed by an equivalent decrease, were observed in three ferrets. The two others exhibited only three spontaneous cycles. The mean interval between two successive maximums equalled 340 +/- 28 days.
mesh_terms: D000818:Animals; D001683:Biological Clocks / Q000528:radiation effects; D002335:Carnivora / Q000502:physiology*; D002940:Circadian Rhythm / Q000528:radiation effects; D005289:Ferrets / Q000502:physiology*; D008027:Light; D008297:Male; D010507:Periodicity; D013696:Temperature; D013737:Testis / Q000033:anatomy & histology / Q000502:physiology*; D013997:Time Factors
vernacular_title: Activité testiculaire du furet maintenu pendant plus de 4 ans en lumiére permanente et température constante.