Reference : Seasonal changes in some plasma hormones in pigeons from different environments.
Scientific journals : Article
Life sciences : Environmental sciences & ecology
Life sciences : Zoology
http://hdl.handle.net/2268/95785
Seasonal changes in some plasma hormones in pigeons from different environments.
English
Saarela, S. [> > > >]
Hissa, R. [> > > >]
Etches, R. [> > > >]
Balthazart, Jacques mailto [> > > >]
Rintamaki, H. [ > > ]
1986
Comparative Biochemistry and Physiology
Pergamon Press
84
1
25-31
Yes (verified by ORBi)
International
0010-406X
Oxford
United Kingdom
[en] Acclimatization ; Animals ; Columbidae/blood ; Corticosterone/blood ; Female ; Follicle Stimulating Hormone/blood ; Hormones/blood ; Luteinizing Hormone/blood ; Male ; Prolactin/blood ; Radioimmunoassay ; Seasons ; Thyroxine/blood ; Triiodothyronine/blood
[en] Seasonal variation in the plasma concentration of lutropin (LH), follitropin (FSH), prolactin (PRL), thyroxine (T4), triiodothyronine (T3) and corticosterone (B) were measured in the pigeon by RIA methods. Pigeons were maintained indoors under constant ambient temperature (Ta) and simulated natural daylight (LD), 12:12 L:D regimens or outdoors exposed to seasonal variations in temperature and photoperiod at Oulu, Finland. Only slight changes of gonadotropins (LH, FSH) were observed throughout the year, without any clear photosensitive or photorefractory period. In the indoor (natural LD) group, LH stayed elevated from May until October. Interdependence between the circannual hormonal fluctuation and photoperiod could not be shown, although the amplitude of FSH, T4 and T3 fluctuation of pigeons maintained in laboratory conditions were greater than that of natural LD and outdoor pigeons, whose circannual rhythms were similar. A high concentration of plasma PRL in autumn and the peak value of B in winter for all groups are thought to be correlated to lipid metabolism. Two peaks, the first in winter and the second in autumn, observed in T4 and T3 hormone profiles, may be due to molting of the pigeons.
http://hdl.handle.net/2268/95785

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
96_1986 CBP Saarela Diurnal.pdfPublisher postprint626.88 kBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.