[Marine predators in fish farming. Collective report for North-Troendelag, Nordland, Troms og Finnmark]

arctic region bacalao cabillaud carnivore carnivoros carnivory caza caza con trampa chars chasse coasts cod control methods cormoran cormorants costa costos costs damage economic value estres fish fish culture fletan foca garza halibut herons hunting jeune animal losses loutre minks noruega norway omble otters perte pescado phoque piscicultura pisciculture poisson (aliment) predation salmon salvelino saumon seals stress trapping trout trucha truite vison young animals