Organochlorine pesticides and polychlorinated biphenyls in cod-liver oils: North Atlantic, Norwegian Sea, North Sea and Baltic Sea

atlantique nord bacalao baltic sea bifenilos policlorados bioaccumulation cabillaud chlordane clordano cod ddt dieldrin dieldrine hch heptachlor heptacloro mar baltico mar de noruega mar del norte mer baltique mer du nord north atlantic north sea norwegian sea organochlorine compounds pesticide pesticides plaguicidas pollution des mers polychlorinated biphenyls residues residuos sea pollution