[Costs for preventive measures against predators]

aliment pour animaux arrendamiento bail cercado control methods costos costs crianza extensiva economic analysis effectif du cheptel extensive husbandry farm inputs feeds fencing insumos agricolas leases livestock management livestock numbers losses manejo del ganado moyen de production agricole noruega norway ovin ovinos pastizales pastures perte piensos predation sheep transport d'animaux transport of animals transporte de animales