1Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco, Chile
2AgResearch Ltd., Invermay Agricultural Centre, Private Bag 50034, Mosgiel 9053, New Zealand
375 Scurr Road, RD1, Dunedin, New Zealand
4School of Veterinary Science, Massey University, PB 11222, Palmerston North, 4442, New Zealand
5School of Agriculture and Environment, Massey University, PB 11222, Palmerston North, 4442, New Zealand