Microplastics found in the World Heritage Site Cocos Island National Park, Costa Rica

Authors

  • Angélica Astorga Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica
  • Andrea Montero-Cordero Fundación Amigos de la Isla del Coco (FAICO), Barrio Escalante, de la Rotonda La Bandera 300 metros oeste Oficentro Casa Holanda oficina 11, 2603-1000 - San José, Costa Rica
  • Geiner Golfin-Duarte Sistema Nacional de Áreas de Conservación (SINAC), Costa Rica
  • Andrea García-Rojas Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica
  • Hannia Vega-Bolaños Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica
  • Fausto Arias-Zumbado Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica
  • Daniela Solís-Adolio Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica
  • Karol Ulate Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica

DOI:

https://doi.org/10.47193/mafis.3532022010907

Keywords:

Marine ecosystem, freshwater ecosystem, sediments, oceanic island, fish, lobsters, shrimps

Abstract

Microplastics (MPs) defined as ‘small’ pieces of plastic < 5 mm have been found in almost every marine habitat around the world, and studies have shown that we can find them in the ocean surface, the water column, the seafloor, the shoreline, in biota and in the atmosphere-ocean interface. This study aimed to assess both marine and freshwater environments of Cocos Island, Costa Rica, in the Pacific Ocean, by sampling sediments and biota to determine the presence and abundance of this pollutant. Sediment samples were superficial and weighed one kilogram each. For the sampling of freshwater fish and shrimps, nonselective capture with small nets was made in rivers with access by land, while fishing rods were used for the marine fish sampling, and cage and scuba diving for lobsters. Plastics were found in all types of samples: 93% of marine sediments, 32% of freshwater sediments, 20% of freshwater fish, 15% of freshwater shrimps, 27% of marine fish, and 51% of marine lobsters. Like many reports around the world, it was expected to find MPs at marine samples, and it was concluded that ocean currents, tourism activities, and discarded fishing gear from illegal fishing activities could be the sources of marine pollutants. In contrast, the amount of MPs found in freshwater environments was not expected. Their possible sources are unclear at this moment.

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Author Biographies

Angélica Astorga, Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica

Andrea Montero-Cordero, Fundación Amigos de la Isla del Coco (FAICO), Barrio Escalante, de la Rotonda La Bandera 300 metros oeste Oficentro Casa Holanda oficina 11, 2603-1000 - San José, Costa Rica

Andrea García-Rojas, Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica

Hannia Vega-Bolaños, Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica

Fausto Arias-Zumbado, Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica

Daniela Solís-Adolio, Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica

Karol Ulate, Universidad Nacional, Avenida 1, Calle 9 Heredia 86, 40101 - Heredia, Costa Rica

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Published

2022-08-10

How to Cite

Astorga, A., Montero-Cordero, A., Golfin-Duarte, G., García-Rojas, A., Vega-Bolaños, H., Arias-Zumbado, F., Solís-Adolio, D. and Ulate, K. (2022) “Microplastics found in the World Heritage Site Cocos Island National Park, Costa Rica”, Marine and Fishery Sciences (MAFIS), 35(3), pp. 403–420. doi: 10.47193/mafis.3532022010907.