Changes in sexual behaviour and semen quality associated with age and type of enclosure of Saint Croix rams in different seasons of the year oleh Sandra Ivon Santos, Fernando Sánchez-Dávila, José Fernando Vázquez-Armijo, Rogelio Alejandro Ledezma-Torres, Alejandro Sergio del Bosque-González, Carlos Luna Palomera, Hugo Bernal-Barragán