Reproduction in Domestic Animals

Seasonality of Reproduction in Mammals 47secretion by melatonin in the ewe. I. Simultaneous delayedincrease in LHRH and luteinizing hormone pulsatile secretion.Biol Reprod 52, 1114–1120.Yenikoye A, 1984: Annual variations in estrual behavior, rateand possibilities for ovulation in Peulh ewes from Niger.Reprod Nutr Dev 24, 11–19.Author’s address (for correspondence): P Chemineau, UMR Physiologiede la Reproduction et des Comportements, INRA, CNRS,Université F. Rabelais, Haras Nationaux, 37380 Nouzilly, France.E-mail: philippe.chemineau@tours.inra.frConflict of interest: P Chemineau has received a research grant fromCEVA Animal Health and has no potential conflicts to declare.J-C Thiéry has received a research grant from ‘‘Institut de RechercheServier’’ and has no potential conflicts to declare.D Guillaume has no potential conflicts to declare.M Migaud has received a research grant from ‘‘Institut de RechercheServier’’ and has no potential conflicts to declare.M-T Pellicer-Rubio has no potential conflicts-to declare.B Malpaux has received a research grant from ‘‘Institut de RechercheServier’’, from ‘‘CEVA Animal Health’’ and has no potential conflictsto declare.Ó 2008 The Authors. Journal compilation Ó 2008 Blackwell Verlag