First Evidence of Microplastic Ingestion by an Arboreal Primate

Area of Science:

• Environmental Science
• Ecology
• Zoology

Background:

• Plastic pollution is a global environmental concern.
• Microplastic contamination has been documented in various ecosystems and species.
• Limited research exists on microplastic ingestion in arboreal primates.

Purpose of the Study:

• To report the first evidence of microplastic ingestion in arboreal primates.
• To investigate the source and potential implications of microplastic contamination in red howler monkeys.

Main Methods:

• Necropsy of two red howler monkeys (Alouatta juara) from central Amazonian várzea forests.
• Identification and characterization of ingested microplastic fibers found in stomach contents.

Main Results:

• Green-colored microplastic fiber filaments (<5 mm) were identified in the stomachs of both individuals.
• The microplastics are inferred to originate from decomposed ghost nets deposited during seasonal floods.

Conclusions:

• Arboreal primates, specifically red howler monkeys, ingest microplastics.
• Plastic pollution poses a threat to forest-dwelling species and ecosystems.
• Further research is needed to assess the extent and health consequences of plastic ingestion in wildlife.