Suescún-Ospina, Sandra T ; Ocampo-Duran, Álvaro
Altmann J. Observational study of behavior: sampling methods. Behaviour. 1974; 48: 227-267. Andersen IL, Berg S, Bøe KE. Crushing of piglets by the mother sow (Sus scofa)-purely accidental or a poor mother? Appl Anim Behav Sci. 2005; 93: 229-243. Araque H, González C, Fuentes A, Sulbarán Ly J, Mora F. Efecto de dos tipos de raciones y cuatro alojamientos sobre el comportamiento productivo de cerdas gestantes. Venezuela. Avances en Investigación Agropecuaria. 2012; 16(3): 53-62. Auvigne V, Leneveu P, Jehannin C, Peltoniemi O, Salle E. Seasonal infertility in sows: A five year field study to analyze the relative roles of heat stress and photoperiod. Theriogenology. 2010; 74: 60-66. Baxter M, Jarvis S, Sherwood L, Robson K, Ormandy E, Farish M, Smurthwaite K, Roehe R, Lawrence B, Edwards S. Indicators of piglet survival in an outdoor farrowing system. Livest Sci. 2009; 124(1): 266-276. Bell W, Urioste J, Barlocco N, Vadell A, Pérez R. 2013. Factores g....  , 2015