[Pollution: jeopardy to the Sint Lawrence beluga whale. Pollution and destruction: three centuries of threats on the belugas]

aromatic hydrocarbons bifenilos policlorados delphinapterus leucas estuaire estuaries estuarios hydrocarbure aromatique life tables necropsie organochlorine compounds pathologie pathology patologia polychlorinated biphenyls population dynamics postmortem examination quebec substance toxique supervivencia survie survival tablas de mortalidad table de survie toxic substances