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Microplastic Occurrence in the Gastrointestinal Tract of a Risso’s Dolphin Grampus griseus in the Northeastern Mediterranean Sea

AQUATIC SCIENCES AND ENGINEERING 2022 7 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Nebil Yücel, Ece Kılıç, Cemal Turan, Sefa Ayhan Demirhan

Summary

A stranded Risso's dolphin in the northeastern Mediterranean was found to contain 454 microplastic particles in its gastrointestinal tract. Fibers and fragments were the most common forms, including polypropylene and polyethylene. This case study documents microplastic ingestion by a cetacean species and contributes to growing evidence of widespread plastic contamination in Mediterranean marine mammals.

Body Systems

Risso’s dolphin Grampus griseus was stranded on the coast of Arsuz-Uluçınar, Iskenderun Bay, Turkey in the northeastern Mediterranean on 29 March 2022. This study was conducted to reveal the relationship between G. griseus and microplastic debris in the northeastern Mediterranean Sea. The gastrointestinal tract (GIT) of one stranding G. griseus was examined, and 454 microplastics particles were extracted. Of all, the majority of them were fibers (96%), black in colour (62%), and 0.5-1 mm in size (38%). This paper represents the first data indicating the microplastic abundance in G. griseus from the northeastern Mediterranean Sea. Also, it creates a baseline to understand the relationship between cetaceans and microplastics in this region.

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