John Wiley & Sons, Ltd.

Dietary exposure of BDE‐47 and BDE‐99 and effects on behavior, bioenergetics and thyroid function in juvenile red‐eared sliders (Trachemys scripta elegans) and common snapping turtles (Chelydra serpentina)

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Juvenile red‐eared sliders (Trachemys scripta elegans) and snapping turtles (Chelydra serpentina) were fed food dosed with BDE‐47 or BDE‐99 for six months beginning approximately nine months post‐hatch. During the exposure period, measurements of growth, bioenergetics and behavior were made while thyroid function and accumulation were quantified post‐exposure. Whole body concentrations of both congeners were lower in red‐eared sliders compared to snapping turtles after six months of exposure. Snapping turtles receiving BDE‐47 had significantly elevated standard metabolic rates after three and four months of exposure (p = 0.014 and p = 0.019, respectively). When exposed to BDE‐99, red‐eared sliders were slower to right themselves after having been inverted (p < 0.0001). Total glandular T4 concentrations were significantly reduced in red‐eared sliders exposed to BDE‐47 (means: control = 8080 ng/g and BDE‐47 = 5126 ng/g; p = 0.034). These results demonstrate that dietary exposure to BDE‐47 and ‐99 can elicit a suite of responses in two species of turtles, but the red‐eared slider appeared to be a more sensitive species to the measured endpoints. Environ Toxicol Chem © 2014 SETAC

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