Killer whale populations are likely to collapse due to persistent PCB contamination. Image: Audun Rikardsen
Collapse of killer whales from PCBs expected - life science news

Scientists found that killer whales are amongst the most highly polychlorinated biphenyls (PCBs) contaminated mammals in the world. PCB contamination affects reproduction and immune function, and threatens viability of killer whale populates. PCBs have been banned in most countries already more than 30 years ago, but their presence in the environment is persistent and accumulate in the tissues of top predators. The current study shows that especially the killer whale populations living near industrialized regions , or feeding at high trophic levels independent of location are at high risk of collapse.

Read the full story: Aarhus University
Scientific publication: Science