Villagómez-Velez, S.I., E., Noreña-Barroso, F., Galván-Magaña, R., González-Armas, G., Rodríguez-Fuentes & A.J., Marmolejo-Rodríguez (2024). Persistent organic pollutants in whale whark (Rhincodon typus) skin biopsies from Bahía de Los Ángeles, Mexico. Bulletin of Environmental Contamination and Toxicology. 112(18): 1-8. DOI: https://doi.org/10.1007/s00128-023-03841-2.
Stephanie Itzel Villagómez-Velez 1, Elsa Noreña-Barroso 2, Felipe Galván-Magaña 1, Rogelio González-Armas 1, Gabriela Rodríguez-Fuentes 3 y Ana Judith Marmolejo-Rodríguez 1
The whale shark (Rhincodon typus) is a filter-feeding organism that can be considered a sentinel species, and Bahía de losÁngeles (BLA) in the Gulf of California is an important sighting site for these elasmobranchs. This filter-feeding organismcan be considered a pollutant sampler from the marine environment. Persistent organic pollutants are toxic compounds withhigh mobility and environmental persistence, bioaccumulation and trophic transfer. Among these are polycyclic aromatichydrocarbons (PAHs) and organochlorine pesticides (OCPs). The present work aimed to determine concentrations of PAHsand OCPs in whale shark skin biopsies, collected in 2021 at BLA. Mean detected levels of PAHs and OCPs were 279.4ng/g dw (dry weight) and 1478.1 ng/g dw, respectively. Analysis of similarities between the ordered sizes (4.2–7.6 m) andthe concentrations of PAHs and OCPs indicated no significant differences. Individual PAHs detected indicate pyrogenicand petrogenic sources; the presence of pesticides at levels higher than those of hydrocarbons may be related to agriculturalactivity in the areas surrounding the Baja California peninsula. This study is the first report of PAH levels in R. typus for theGulf of California and Mexico.
Palabras clave: Gulf of California; Hydrocarbons; pesticides; Skin biopsies; Whale shark
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