Microplastics in beluga whales (Delphinapterus leucas) from the Eastern Beaufort Sea

MARINE POLLUTION BULLETIN

卷:150

Article

Moore, R. C.^1,2  Loseto, L.³  Noel, M.¹  Etemadifar, A.¹  Brewster, J. D.³  MacPhee, S.³  Bendell, L.²  Ross, P. S.¹ 

[1] Ocean Wise Conservat Assoc, 845 Avison Way, Vancouver, BC V6G 3E2, Canada

[2] Simon Fraser Univ, Biol Sci, 8888 Univ Dr, Burnaby, BC V5A 1S6, Canada

[3] Dept Fisheries & Oceans Canada, 501 Univ Crescent, Winnipeg, MB R3T 2N6, Canada

关键词: Microplastic;    Marine mammal;    Beluga whale;    Arctic;    Beaufort Sea;   

DOI  :  10.1016/j.marpolbul.2019.110723

来源: Elsevier

【 摘 要 】

Microplastics (MPs, particles < 5 mm) represent an emerging global environmental concern, having been detected in multiple aquatic species. However, very little is known about the presence of MPs in higher trophic level species, including cetaceans. We worked with community based monitors and Inuvialuit hunters from Tuktoyaktuk (Northwest Territories, Canada) to sample seven beluga whales (Delphinapterus leucas) in 2017 and 2018. Microplastics were detected in the gastrointestinal tracts in every whale. We estimate that each whale contained 18 to 147 MPs in their GI tract (average of 97 +/- 42 per individual). FTIR-spectroscopy revealed over eight plastic polymer types, with nearly half being polyester. Fibres made up 49% of MPs. The diversity of MP shapes and polymeric identities in beluga points to a complex source scenario, and ultimately raises questions regarding the significance and long-term exposure of this pollutant in this ecologically and culturally valuable species.

【 授权许可】

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