Abstract
This study provides the first evidence of microplastic (MP) occurrence in gill and gastrointestinal tract (GIT) of Pontastacus leptodactylus (N = 37), a commercially important crayfish in Turkey. MPs were found in the GIT of all examined individuals with an average of about 11.9 ± 9.7 (male: 13.6 ± 8.3 and female: 10.1 ± 10.9) MPs/ind. Female crayfishes ingested less MPs than males potentially due to being more sedentary as well as interruption in feeding during spawning and hatching periods. The concurrencies of tangled balls of fibers were detected as 47 % in males and 28 % in females. The majority of extracted microplastic were fiber (97 %), black (56 % in the gill and 38 % in the GIT) and 1–2.5 mm in size (35 % in the gill and 39 % in the GIT). High MPs contamination observed in this study highlights the concerns related to the consumption of seafood since Pontastacus leptodactylus is commercially used.
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