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Here we show that several cetacean species have very high mean blubber PCB concentrations likely to cause population declines and suppress population recovery. In a large pan-European meta-analysis of stranded (n\u2009=\u2009929) or biopsied (n\u2009=\u2009152) cetaceans, three out of four species:- striped dolphins (SDs), bottlenose dolphins (BNDs) and killer whales (KWs) had mean PCB levels that markedly exceeded all known marine mammal PCB toxicity thresholds. Some locations (e.g. western Mediterranean Sea, south-west Iberian Peninsula) are global PCB \u201chotspots\u201d for marine mammals. Blubber PCB concentrations initially declined following a mid-1980s EU ban, but have since stabilised in UK harbour porpoises and SDs in the western Mediterranean Sea. Some small or declining populations of BNDs and KWs in the NE Atlantic were associated with low recruitment, consistent with PCB-induced reproductive toxicity. Despite regulations and mitigation measures to reduce PCB pollution, their biomagnification in marine food webs continues to cause severe impacts among cetacean top predators in European seas.<\/jats:p>","DOI":"10.1038\/srep18573","type":"journal-article","created":{"date-parts":[[2016,1,14]],"date-time":"2016-01-14T14:15:22Z","timestamp":1452780922000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":353,"title":["PCB pollution continues to impact populations of orcas and other dolphins in European waters"],"prefix":"10.1038","volume":"6","author":[{"given":"Paul D.","family":"Jepson","sequence":"first","affiliation":[]},{"given":"Rob","family":"Deaville","sequence":"additional","affiliation":[]},{"given":"Jonathan L.","family":"Barber","sequence":"additional","affiliation":[]},{"given":"\u00c0lex","family":"Aguilar","sequence":"additional","affiliation":[]},{"given":"Asunci\u00f3n","family":"Borrell","sequence":"additional","affiliation":[]},{"given":"Sin\u00e9ad","family":"Murphy","sequence":"additional","affiliation":[]},{"given":"Jon","family":"Barry","sequence":"additional","affiliation":[]},{"given":"Andrew","family":"Brownlow","sequence":"additional","affiliation":[]},{"given":"James","family":"Barnett","sequence":"additional","affiliation":[]},{"given":"Simon","family":"Berrow","sequence":"additional","affiliation":[]},{"given":"Andrew A.","family":"Cunningham","sequence":"additional","affiliation":[]},{"given":"Nicholas J.","family":"Davison","sequence":"additional","affiliation":[]},{"given":"Mariel","family":"ten Doeschate","sequence":"additional","affiliation":[]},{"given":"Ruth","family":"Esteban","sequence":"additional","affiliation":[]},{"given":"Marisa","family":"Ferreira","sequence":"additional","affiliation":[]},{"given":"Andrew D.","family":"Foote","sequence":"additional","affiliation":[]},{"given":"Tilen","family":"Genov","sequence":"additional","affiliation":[]},{"given":"Joan","family":"Gim\u00e9nez","sequence":"additional","affiliation":[]},{"given":"Jan","family":"Loveridge","sequence":"additional","affiliation":[]},{"given":"\u00c1ngela","family":"Llavona","sequence":"additional","affiliation":[]},{"given":"Vidal","family":"Martin","sequence":"additional","affiliation":[]},{"given":"David L.","family":"Maxwell","sequence":"additional","affiliation":[]},{"given":"Alexandra","family":"Papachlimitzou","sequence":"additional","affiliation":[]},{"given":"Rod","family":"Penrose","sequence":"additional","affiliation":[]},{"given":"Matthew W.","family":"Perkins","sequence":"additional","affiliation":[]},{"given":"Brian","family":"Smith","sequence":"additional","affiliation":[]},{"given":"Renaud","family":"de Stephanis","sequence":"additional","affiliation":[]},{"given":"Nick","family":"Tregenza","sequence":"additional","affiliation":[]},{"given":"Philippe","family":"Verborgh","sequence":"additional","affiliation":[]},{"given":"Antonio","family":"Fernandez","sequence":"additional","affiliation":[]},{"given":"Robin J.","family":"Law","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2016,1,14]]},"reference":[{"key":"BFsrep18573_CR1","doi-asserted-by":"publisher","first-page":"425","DOI":"10.1016\/S0141-1136(01)00128-3","volume":"53","author":"A Aguilar","year":"2002","unstructured":"Aguilar, A., Borrell, A. & Reijnders, P. 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