Multiple mating and paternity determinations in domestic swine (Sus scrofa) Ulises Aguilera-Reyes, Guadalupe Zavala-Páramo, Juan José Valdez-Alarcón, Horacio Cano-Camacho, Georgina I. García-López and Nazario Pescador-Salas Anim. Res., 55 5 (2006) 409-417 Published online: 14 November 2006 DOI: 10.1051/animres:2006024