4.7 Article

Monitoring the occurrence of microplastic ingestion in Otariids along the Peruvian and Chilean coasts

Journal

MARINE POLLUTION BULLETIN
Volume 153, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2020.110966

Keywords

Microfragments; PET; Microfiber; Bioindicator; Pinnipeds

Funding

  1. Rufford Foundation [N 18815-1]
  2. Direccion de Investigacion y Doctorados, Universidad Andres Bello
  3. CONICYT-FONDECYT [11150548, 116504, 111609059]
  4. Instituto Antartico Chileno Grant [INACh RT_12_17]
  5. Conicyt PCI [REDI 170292, REDI 170403]
  6. Ministerio de Economia, Fomento y Turismo through Iniciativa Cientifica Milenio (Nucleo Milenio INVASAL)
  7. Direccion de Investigacion Universidad de Valparaiso [DIUV 38/2013]
  8. Morris Animal Foundation fellowship [N D16ZO-413]
  9. Saint Louis Zoo
  10. Chicago Zoological Society
  11. Kansas City Zoo
  12. Woodland Park Zoo

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Repeated reports of microplastic pollution in the marine pinniped diet have emerged in the last years. However, only few studies address the drivers of microplastics presence and the potential implications for monitoring microplastic pollution in the ocean. This study monitored their in the scats (N = 205) of four pinniped species/subspecies at five different locations in the southern Pacific Ocean (Peru and Chile). Samples from all rookeries contained microplastics, and overall, 68% of the examined scats contained fragments/fibers, mostly blue colored. We confirmed that 81.5% of the fragments/fibers were anthropogenic in origin , but only 30% were polymers. Scats from Juan Fernandez Archipelago presented higher microplastic concentrations than continental rookeries. Also, the common diet in each location may influence the levels found in the samples. This study presents a useful non-invasive technique to track plastic pollution in top predator diets as bioindicators for future surveillance/management plans applied to different location.

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