Mercury and selenium concentrations in leatherback sea turtles (Dermochelys coriacea): Population comparisons, implications for reproductive success, hazard quotients and directions for future research

Perrault, Justin R.; Miller, Debra L.; Garner, Jeanne A.; Wyneken, Jeanette

doi:10.1016/j.scitotenv.2013.05.067

Cited by 45 publications

(27 citation statements)

References 70 publications

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“…However, field studies have indicated the potential toxicity of selenium in these vertebrates as documented for American alligator Alligator mississipiensis (Roe et al 2004) and marine turtles (Lam et al 2006;van de Merwe et al 2009;Perrault et al 2013;Dyc et al 2015). For the first time, the present study investigated the toxicity and kinetics of selenium towards freshwater turtle specie, the slider turtle Trachemys scripta.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 96%

“…Globally speaking, much remains to be discovered in the field of selenium toxicity and especially in poikilothermic amniotes commonly known as reptiles (Janz et al 2010;Sparling et al 2010;Young et al 2010;Perrault et al 2013). Nevertheless, laboratory-controlled studies have provided evidences that reptiles may be likewise affected by selenium exposure.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

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Toxicokinetics of selenium in the slider turtle, Trachemys scripta

et al. 2016

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Selenium (Se) is an essential element that can be harmful for wildlife. However, its toxicity in poikilothermic amniotes, including turtles, remains poorly investigated. The present study aims at identifying selenium toxicokinetics and toxicity in juvenile slider turtles (age: 7 months), Trachemys scripta, dietary exposed to selenium, as selenomethionine SeMet, for eight weeks. Nondestructive tissues (i.e. carapace, scutes, skin and blood) were further tested for their suitability to predict selenium levels in target tissues (i.e. kidney, liver and muscle) for conservation perspective. 130 juvenile yellow-bellied slider turtles were assigned in three groups of 42 individuals each (i.e. control, SeMet 1 and SeMet 2 ). These groups were subjected to a feeding trial including an eight-week supplementation period SP 8 and a following 4-week elimination period EP 4 . During the SP 8 , turtles fed on diet containing 1.1 ± 0.04, 22.1 ± 1.0 and 45.0 ± 2.0 lg g -1 of selenium (control, SeMet 1 and SeMet 2 , respectively). During the EP 4 , turtles fed on non-supplemented diet. At different time during the trial, six individuals per group were sacrificed and tissues collected (i.e. carapace, scutes, skin, blood, liver, kidney, muscle) for analyses. During the SP 8 (Fig. 1), both SeMet 1 and SeMet 2 turtles efficiently accumulated selenium from a SeMet dietary source. The more selenium was concentrated in the food, the more it was in the turtle body but the less it was removed from their tissues. Moreover, SeMet was found to be the more abundant selenium species in turtles' tissues. Body condition (i.e. growth in mass and size, feeding behaviour and activity) and survival of the SeMet 1 and SeMet 2 turtles seemed to be unaffected by the selenium exposure. There were clear evidences that reptilian species are differently affected by and sensitive to selenium exposure but the lack of any adverse effects was quite unexpected.

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Section: Electronic Supplementary Materialsmentioning

confidence: 96%

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Toxicokinetics of selenium in the slider turtle, Trachemys scripta

et al. 2016

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“…Although several studies have focused on Hg effects on marine organisms (i.e. fish, marine mammals and seabirds), there is still a large gap regarding Hg impacts on reptiles (Perrault et al, 2013;Schneider et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Food preferences and Hg distribution in Chelonia mydas assessed by stable isotopes

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et al. 2015

Environmental Pollution

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“…Leatherbacks are found throughout all of the world's oceans and commonly travel long distances during their lives. The extended amount of time leatherbacks spend in the ocean subjects them to exposure to pollutants and contaminants that may be present [32][33][34][35][36][37][38]. These pollutants have the potential to lead to detrimental health effects including reproductive issues [34,38,39].…”

Section: Leatherback Sea Turtlesmentioning

confidence: 99%

“…Several studies have investigated metal levels in leatherback sea turtles around the world and found their tissues can accumulate metals such as mercury, cadmium, lead, and arsenic [34][35][36][37][38][43][44][45][46][47]. To my knowledge only one study has investigated Cr levels in leatherback sea turtles, but did not measure Cr levels in lung tissue [47].…”

Section: Leatherback Sea Turtlesmentioning

confidence: 99%

The comparative cytotoxicity and genotoxicity of hexavalent chromium in humans and sea turtles.

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Mercury and selenium concentrations in leatherback sea turtles (Dermochelys coriacea): Population comparisons, implications for reproductive success, hazard quotients and directions for future research

Cited by 45 publications

References 70 publications

Toxicokinetics of selenium in the slider turtle, Trachemys scripta

Toxicokinetics of selenium in the slider turtle, Trachemys scripta

Food preferences and Hg distribution in Chelonia mydas assessed by stable isotopes

The comparative cytotoxicity and genotoxicity of hexavalent chromium in humans and sea turtles.

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