[Can melatonin be used in out-of-season reproduction in domestic mammals?].
Melatonin, synthetized by the pineal gland, is the chemical messenger which allows seasonal animals to perceive day length changes. The nervous message, transformed into a hormonal one, triggers pulsatile activity of the LHRH neurons. Its sites and mode of actions are not completely elucidated. The most frequent mode of distribution is the sub-cutaneous implant, which induces an advance of the cyclical ovulatory activity of ewes and goats. The date of fertilization is advanced and fecundity of females is improved. It can be used alone, or in association with other hormonal treatments, or after an artificial photoperiodic treatment. Under these conditions, it allows a quantitative and qualitative increase in out-of-season sperm production in rams and he-goats.
Chemineau
P
P
INRA Unité de neuro-endocrinologie sexuelle, Station de physiologie de la reproduction des mammiferes domestiques, Nouzilly, France.
Berthelot
X
X
Daveau
A
A
Maurice
F
F
Viguié
C
C
Malpaux
B
B
D000818:Animals; D000829:Animals, Domestic; D001947:Breeding / Q000379:methods*; D002986:Clinical Trials as Topic; D004343:Drug Implants; D005260:Female; D005298:Fertility / Q000187:drug effects; D006041:Goats / Q000502:physiology*; D008027:Light; D008297:Male; D008550:Melatonin / Q000494:pharmacology* / Q000502:physiology; D011966:Receptors, LHRH / Q000187:drug effects; D012098:Reproduction / Q000187:drug effects*; D012621:Seasons; D012756:Sheep / Q000502:physiology*
D004343:Drug Implants; D011966:Receptors, LHRH; D008550:Melatonin
La mélatonine permet-elle la reproduction à contre-saison chez les mammifères d'élevage?