Genetic parameters of spontaneous spring ovulatory activity in Mérinos d'Arles sheep Eric Hanocq, Loys Bodin, Jacques Thimonier, Jacques Teyssier, Benoit Malpaux and Philippe Chemineau Genet. Sel. Evol., 31 1 (1999) 77-90 DOI: 10.1051/gse:19990105