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Microplastics in the fish Dormitator maculatus from the Alvarado Lagoon, Veracruz, Mexico
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Researchers found 1,134 microplastic particles in the gills and digestive tracts of 127 fat sleeper fish from Mexico's Alvarado Lagoon, with an average of about 9 MPs per fish, and identified correlations between MP burden and biological health parameters in the sampled organisms.
This work analyzed the presence of microplastics (MP) in the gills and digestive tract of the fish Dormitator maculatus and its relationship with biological parameters in the Alvarado Lagoon (AL). In 127 organisms, 1,134 MP were found: 561 in the digestive tract and 573 in the gills, with an average of 8.9 MP per individual. Central tendency, Mann-Whitney, Kruskal-Wallis, and linear regression tests were performed to examine the relationship between the number of MP and the biological parameters of D. maculatus. A slight correlation was found between the number of MP in the gut and gills. The biological parameters analyzed - weight, length, condition index, and gut fullness - lacked a relationship between the amount of MP present in the gut and gills. The MPs were classified by color and type: fibers, pellets, films, and fragments. All fish analyzed presented MP in digestive tracts and gills, which indicates a uniform distribution of contamination and suggests that it originates from nearby populations, resulting from daily activities such as washing synthetic clothes and fishing. Fibers were the most dominant material (97.53%), comprising 62% blue and 12% transparent fibers. The presence of these is a threat to the health of both fauna and humans.
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Microplastics in the Digestive Tract and Gills of Dormitator maculatus (Perciformes, Eleotridae) from Alvarado Lagoon
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Researchers analyzed microplastic contamination in the digestive tracts and gills of 127 Dormitator maculatus fish from the Alvarado lagoon, recovering 1,134 microplastic particles -- predominantly blue fibers comprising 97.53% of the total -- from both tissue types. The study documents high microplastic ingestion rates in this nearshore fish species and highlights fiber pollution as the dominant microplastic form in the lagoon.
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Researchers found microplastics in 316 particles across 240 gastrointestinal tracts from six commercially consumed fish species in Campeche Bay, Mexico, with average ingestion of 1.31 MPs per fish, and found that fish feeding in mid-water column tended to ingest denser polymer types reflecting their depth distribution.
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This study documented plastic ingestion in the neotropical Pacific fat sleeper fish from an Ecuadorian wetland for the first time, finding plastics in 50% of individuals with an average of 30 particles per fish. Microplastics dominated the ingested plastic load, showing that wetland fish in South America are exposed to plastic pollution.
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