[1] Pontificia Univ Catolica Chile, Fac Agron & Ingn Forestal, Dept Ciencias Anim, Santiago, Chile
[2] Univ Fed Santa Catarina, Dept Zootecnia & Desenvolvimento Rural, Lab Etol Aplicada, Florianopolis, SC, Brazil
[3] Pontificia Univ Catolica Chile, Fac Agron Ingn Forestal, Dept Econ Agr, Santiago, Chile