Persistent macroplastics in the stomach contents of the green turtle Chelonia mydas (Linnaeus, 1758) on the northern coast of Peru

Santillán L.; Jimenez A.; Pingo S.; Alfaro-Shigueto J.; Pajuelo M.; Montes D.; Mangel J.C. · Revista Peruana de Biologia (2025) · DOI: 10.15381/rpb.v32i4.31408

Resumen

This study analyses the diet composition and macroplastic ingestion in green turtles (Chelonia mydas) from Sechura Bay, northern Peru, based on digestive tract samples collected during two periods: 2001-2004 and 2013-2014. A total of 67 specimens were examined, revealing a significant increase in macroplastic ingestion over time, particularly among juvenile individuals. Dietary analysis showed a predominance of animal prey in the earlier period, with a negative correlation between animal prey and macroplastic occurrence. In contrast, algae consumption showed no significant relationship with macroplastic ingestion. Size composition analysis revealed a marked reduction in curved carapace length (CCL) in the second period, indicating a shift toward younger individuals. The presence of macroplastics was more frequent and diverse in recent samples, suggesting increased environmental exposure. These findings highlight Sechura Bay as a critical feeding ground for immature green turtles and underscore the growing impact of marine plastic pollution on vulnerable life stages. The study supports the hypothesis that macroplastic ingestion may be influenced by ecological interactions, such as biofouling and olfactory cues, rather than accidental intake alone. Conservation efforts should prioritize pollution control and habitat protection to mitigate long-term risks to green turtle populations in the Southeast Pacific. © Los autores. Este artículo es publicado por la Revista Peruana de Biología de la Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos. Este es un artículo de acceso abierto, distribuido bajo los términos de la Licencia Creative Commons Atribución 4.0 Internacional. (https://creativecommons.org/licenses/by/4.0/deed.es) que permite Compartir (copiar y redistribuir el material en cualquier medio o formato), Adaptar (remezclar, transformar y construir a partir del material) para cualquier propósito, incluso comercialmente.

Instituciones: Universidad Científica del Sur; Universidad San Ignacio de Loyola