Widespread microplastic ingestion by fish assemblages in tropical estuaries subjected to anthropogenic pressures

Last modified: 
July 20, 2017 - 10:38am
Type: Journal Article
Year of publication: 2017
Date published: 04/2017
Authors: A.L. Vendel, F. Bessa, V.E.N. Alves, A.L.A. Amorim, J. Patrício, A.R.T. Palma
Journal title: Marine Pollution Bulletin
Volume: 117
Issue: 1-2
Pages: 448 - 455
ISSN: 0025326X

Our aim was to quantify microplastic ingestion by fish assemblages in two tropical Brazilian estuaries and to evaluate whether biological and ecological factors influence the ingestion of microplastics by fish species. Of 2233 fish from both estuaries (from 69 species) examined in this study, 9% of the individuals (24 species) had microplastics in their gut contents. Microplastic ingestion occurred irrespective of fish size and functional group. The diet of fish species was analyzed based on prey items identified in the fish's full stomach contents and five feeding guilds were defined. Microplastics were common throughout all feeding guilds. Low (average ingestion values 1.06 ± 0.30 items/total fish) but widespread occurrence among estuaries also indicates proliferation of microplastic pollution. Our findings highlight the need to focus on assemblage level studies to understand the real magnitude of the problem and emphasize the urgency of mitigation measures directed at microplastic pollution in estuarine ecosystems.

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