Persistent organic pollutants and stable isotopes in the liver of Chelonia mydas stranded on the southeastern Brazilian coast

Among the various pollutants released into the environment, there are persistent organic pollutants (POPs). Chelonia mydas are one of the species that can be exposed to these pollutants and it is classified in the IUCN Red List as “endangered”. The present study evaluated the occurrence of POPs in 4...

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Bibliographic Details
Published in:Marine pollution bulletin 2021-12, Vol.173 (Pt B), p.113075-113075, Article 113075
Main Authors: Jarcovis, Raphael De Lucca Marcello, Taniguchi, Satie, da Silva, Josilene, Lourenço, Rafael André
Format: Article
Language:English
Subjects:
Animals
Aquatic reptiles
Biometrics
Biometry
Chelonia mydas
Environmental factors
Green turtle
Isotope ratios
Isotopes
Juveniles
Liver
Liver - chemistry
Low concentrations
Marine turtle
Organochlorine pesticides
Persistent Organic Pollutants
Pollutants
Polychlorinated biphenyls
Sea turtles
Stable isotopes
Threatened species
Turtles
Water Pollutants, Chemical - analysis
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Summary:Among the various pollutants released into the environment, there are persistent organic pollutants (POPs). Chelonia mydas are one of the species that can be exposed to these pollutants and it is classified in the IUCN Red List as “endangered”. The present study evaluated the occurrence of POPs in 49liver tissue samples of C. mydas juveniles collected on the southeastern Brazilian coast. Furthermore, the concentrations were correlated with carbon and nitrogen isotopic ratio, biometrics, and ecological factors. The main POPs found were ƴ-HCH and PCBs. Overall, the concentrations found were low and there were no significant correlations among POPs, isotopic ratios, size and weight, which may be related to the fact that the studied individuals are juveniles and occupy similar trophic positions despite the individual variations found. Despite the low concentrations, the presence of POPs, mainly PCBs, in the sea turtles' liver indicates their exposure to these compounds. •ƴ-HCH was the only organochlorine pesticide detected in most samples.•PCBs were the predominant POP found.•Juveniles from the region show a tendency for herbivory, although some individual differences.•No correlation was found between POPs and δ15N and δ13C.
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2021.113075