[Occurence and ecology in cod [gadus], flounder, sea trout [salmo trutta] and pelagic fish in the Grenland fiords]

animal migration bacalao cabillaud cod comportement alimentaire ecologia marina feeding habits fiordo fiords fishery resources fjord flet flounders marine ecology migration animale niveau trophique noruega norway platija pollution des mers population density recursos pesqueros ressource halieutique salmo trutta sea pollution trophic levels