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Title: Incidence of 49 elements in the blood and scute tissues of nesting hawksbill turtles (Eretmochelys imbricata) in Holbox Island
Authors: Escobedo Mondragón, Maribel
Pérez Luzardo, Octavio Luis 
Zumbado Peña, Manuel Luis 
Rodríguez Hernández, Ángel 
Rial Berriel, Cristian Javier 
Ramírez-Gomez, Héctor Vicente
González-Rebeles Islas, Carlos
Aguilar Fisher, Roberto F.
Rosiles Martínez, J. Rene
UNESCO Clasification: 3105 Peces y fauna silvestre
3214 Toxicología
Keywords: Caribbean Region
Inorganic Emergent Pollutants
Rare Earth Elements, et al
Issue Date: 2021
Journal: Regional Studies in Marine Science 
Abstract: Due to progressive urban development along the Mexican Caribbean coastline, it is crucial to gauge the impact of anthropogenic contamination of marine ecosystems through biomonitoring procedures. In the current study, we quantified the concentration of 49 inorganic elements in the blood and scute tissues of clinically healthy nesting hawksbill sea turtles (Eretmochelys imbricata). The elements were classified into four groups: Group A: essential mineral elements with toxic potential; Group B: non-essential elements with high toxicity; Group C: toxic non-essential minority elements and Trace Elements (TE); and Group D: rare-earth elements (REE) and other TE. Almost all the samples in both tissues showed perceptible levels of all the quantified elements. The only element identified with a correlation between blood and scute was arsenic (As), which could indicate a fast excretion through this type of keratinized tissue. The bio-accumulation of inorganic elements is a complex process, requiring the simultaneous examination of different tissues to evaluate the exposure. Our study reinforces the usefulness of scute tissue as a non-invasive sampling technique for the evaluation of persistent pollutants in marine turtles.
DOI: 10.1016/j.rsma.2020.101566
Source: Regional Studies in Marine Science [EISSN 2352-4855], v. 41, (Enero 2021)
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