Chemical Element Concentrations in the Blood of Green Turtles (Chelonia Mydas) Captured at Fernando De Noronha Marine National Park, Brazil

Prioste, Fabíola Eloisa Setim; Souza, Vanessa Cristina de Oliveira; Queiroz, Mariana Ramos; Chiacchio, Rosely Gioia‐Di; Fern,; Barbosa, Orlando Rus; Matushima, Eliana Reiko

doi:10.4172/2161-0525.1000325

Cited by 4 publications

(3 citation statements)

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“…Reliable comparisons may be further hindered by the lack of universal sampling and analytical methods across studies, though some limited insight may be gleaned as to ecologically relevant metal profiles of other C. mydas foraging habitats elsewhere and how local environments along the Great Barrier Reef compare. Concentrations of Co in the blood of C. mydas from populations in Brazil (Prioste et al, 2015), Australia (Gaus et al, 2012), and California (Barraza et al, 2019) were lower than at all coastal sites in the present study (Supporting Information, Table S6). Cobalt was not detected at all in other populations, such as those studied in Thailand (Chomchat et al, 2023) and Hawaii (Shaw et al, 2021).…”

Section: Spatial Variation In C Mydas Metal Concentrationscontrasting

confidence: 45%

Green Turtle (Chelonia mydas) Blood and Scute Trace Element Concentrations in the Northern Great Barrier Reef

Wilkinson

Ariel

Merwe

et al. 2023

Enviro Toxic and Chemistry

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Marine turtles face numerous anthropogenic threats, including that of chemical contaminant exposure. Ecotoxicological impact of toxic metals is a global issue facing Chelonia mydas in coastal sites. Local investigation of C. mydas short‐term blood metal profiles is an emerging field, while little research has been conducted on scute metal loads as potential indicators of long‐term exposure. The aim of this study was to investigate and describe C. mydas blood and scute metal profiles in coastal and offshore populations of the Great Barrier Reef (GBR). This was achieved by analysing blood and scute material sampled from local C. mydas populations in five field sites, for a suite of ecologically relevant metals. By applying Principal Component Analysis and comparing coastal sample data to that of reference intervals derived from the control site, insight was gleaned on local metal profiles of each population. Blood metal concentrations in turtles, from coastal sites, were typically elevated when compared with levels recorded in the offshore control population (Howick Island Group, (HWK). Scute metal profiles were similar in Cockle Bay (CB), Upstart Bay (UB) and Edgecombe Bay (EB), all of which were distinct from that of Toolakea (TLK). Some elements were reported at similar concentrations in blood and scutes, but most were higher in scute samples, indicative of temporal accumulation. Coastal C. mydas populations may be at risk of toxic effects from metals such as Co, which was consistently found to be at concentrations magnitudes above region‐specific reference intervals.

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Section: Spatial Variation In C Mydas Metal Concentrationscontrasting

confidence: 45%

Green Turtle (Chelonia mydas) Blood and Scute Trace Element Concentrations in the Northern Great Barrier Reef

Wilkinson

Ariel

Merwe

et al. 2023

Enviro Toxic and Chemistry

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“…A number of other marine turtle studies have observed correlations among various toxic elements in whole blood (Innis et al, 2008;Jerez et al, 2010;Komoroske et al, 2011;Ley-Quiñónez et al, 2011;Camacho et al, 2013;Trocini, 2013;Prioste et al, 2015). These correlations likely exist for several reasons: (1) loggerheads have simultaneous exposure to these elements through prey items, (2) these elements have similar transport mechanisms and physiological pathways in the body (heavy metals and metalloids are bound to red blood cells), and/or (3) there are antagonistic effects of the elements (Innis et al, 2008;Komoroske et al, 2011;Prioste et al, 2015).…”

Section: Blood and Keratin Toxic Element Correlationsmentioning

confidence: 99%

“…Comparisons to thallium concentrations in other marine turtle species are difficult, as all blood thallium samples from this study except three were BDL (~<0.0002 µg/g ww); all keratin samples also fell BDL (Table 2). Prioste et al (2015) reported median blood thallium concentration in green turtles from Brazil to be 0.00008 µg/g ww, while nesting flatbacks (Natator depressus) from Australia had thallium concentrations <0.0001 µg/g ww (Ikonomopoulou et al, 2011). Free-ranging subadult and adult loggerheads from South Carolina, Georgia, and Florida USA had thallium concentrations that ranged from BDL to 0.046 µg/g ww (Register, 2011).…”

Section: Blood and Keratin Toxic Element Concentrationsmentioning

confidence: 99%

Toxic elements and associations with hematology, plasma biochemistry, and protein electrophoresis in nesting loggerhead sea turtles (Caretta caretta) from Casey Key, Florida

Perrault

Stacy

Lehner

et al. 2017

Environmental Pollution

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Toxic elements (arsenic, cadmium, lead, mercury, selenium, thallium) are a group of contaminants that are known to elicit developmental, reproductive, general health, and immune system effects in reptiles, even at low concentrations. Reptiles, including marine turtles, are susceptible to accumulation of toxic elements due to their long life span, low metabolic rate, and highly efficient conversion of prey into biomass. The objectives of this study were to (1) document concentrations of arsenic, cadmium, lead, mercury, selenium, and thallium in whole blood and keratin from nesting loggerhead sea turtles (Caretta caretta) from Casey Key, Florida and document correlations thereof and (2) correlate whole blood toxic element concentrations to various hematological and plasma biochemistry analytes. Baselines for various hematological and plasma analytes and toxic elements in whole blood and keratin (i.e., scute) in nesting loggerheads are documented. Various correlations between the toxic elements and hematological and plasma biochemistry analytes were identified; however, the most intriguing were negative correlations between arsenic, cadmium, lead, and selenium with and α- and γ-globulins. Although various extrinsic and intrinsic variables such as dietary and feeding changes in nesting loggerheads need to be considered, this finding may suggest a link to altered humoral immunity. This study documents a suite of health variables of nesting loggerheads in correlation to contaminants and identifies the potential of toxic elements to impact the overall health of nesting turtles, thus presenting important implications for the conservation and management of this species.

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Evaluation of biometry and blood concentration of heavy metals in free-living Chelonia mydas with and without fibropapillomatosis in southern Brazil

Pérez

Lima

Souza

et al. 2023

Marine Pollution Bulletin

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Chemical Element Concentrations in the Blood of Green Turtles (Chelonia Mydas) Captured at Fernando De Noronha Marine National Park, Brazil

Cited by 4 publications

References 0 publications

Green Turtle (Chelonia mydas) Blood and Scute Trace Element Concentrations in the Northern Great Barrier Reef

Green Turtle (Chelonia mydas) Blood and Scute Trace Element Concentrations in the Northern Great Barrier Reef

Toxic elements and associations with hematology, plasma biochemistry, and protein electrophoresis in nesting loggerhead sea turtles (Caretta caretta) from Casey Key, Florida

Evaluation of biometry and blood concentration of heavy metals in free-living Chelonia mydas with and without fibropapillomatosis in southern Brazil

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