Conditioned gonadal response of Japanese quail to cyclic photoperiod

Autor:	T. D. Siopes, W. O. Wilson
Rok vydání:	1967
Předmět:	photoperiodism endocrine system Atmospheric Science medicine.medical_specialty Ecology Health Toxicology and Mutagenesis Period (gene) Biology Dark period Quail Endocrinology Phase shifted Internal medicine biology.animal Darkness medicine
Zdroj:	International Journal of Biometeorology. 11:289-295
ISSN:	1432-1254 0020-7128
DOI:	10.1007/bf01426651
Popis:	The conditioning effect of cyclic photoperiods was studied in 9 experiments. Quail after 1 day of age were exposed to repeated cycles of 6 hr of light and 18 hr of darkness during their first 4 weeks.Afterwards the groups were established to study the effect of (a) ahemeral (unnatural daylength); (b) phase shifted, and (c) abbreviated photoperiods. The quail were kept on such regimens for 3 weeks. The results based on the 7-week testicular weights indicated that quail did not respond to a phase shift in the light period but responded to an abbreviation of a previously established photoperiod.Quail responded to unnatural daylength even when the actual and relative length of the dark period increased.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2a7f8200ba86708c1293296cf3d5838f https://doi.org/10.1007/bf01426651 Zobrazit plný text záznamu Full text from SpringerLink