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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 )
Author(s) -
Eisenreich Karen M.,
Rowe Christopher L.
Publication year - 2014
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.2745
Subject(s) - bioenergetics , juvenile , chelydra , zoology , biology , thermoregulation , bioaccumulation , acute exposure , chemistry , anatomy , endocrinology , ecology , turtle (robot) , mitochondrion , microbiology and biotechnology
Juvenile red‐eared sliders ( Trachemys scripta elegans ) and snapping turtles ( Chelydra serpentina ) were fed food dosed with brominated diphenyl ether‐47 (BDE‐47) or BDE‐99 for 6 mo beginning approximately 9 mo posthatch. During the exposure period, measurements of growth, bioenergetics, and behavior were made; thyroid function and accumulation were quantified postexposure. Whole‐body concentrations of both congeners were lower in red‐eared sliders compared with snapping turtles after 6 mo of exposure. Snapping turtles receiving BDE‐47 had significantly elevated standard metabolic rates after 3 mo and 4 mo 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 thyroxine concentrations were significantly reduced in red‐eared sliders exposed to BDE‐47 (mean control, 8080 ng/g; mean BDE‐47, 5126 ng/g; p = 0.034). These results demonstrate that dietary exposure to BDE‐47 and BDE‐99 can elicit a suite of responses in 2 species of turtles, but that the red‐eared slider appears to be a more sensitive species to the measured end points. Environ Toxicol Chem 2014;33:2810–2817 . © 2014 SETAC