ORBi: Guirlet Elodie - Maternal transfer of chlorinated contaminants in the leatherback turtles, Dermochelys coriacea, nesting in French Guiana

Reference : Maternal transfer of chlorinated contaminants in the leatherback turtles, Dermochelys co...


	Document type :	Scientific journals : Article
	Discipline(s) :	Life sciences : Environmental sciences & ecology Life sciences : Aquatic sciences & oceanology
	To cite this reference:	http://hdl.handle.net/2268/5338

Title :	Maternal transfer of chlorinated contaminants in the leatherback turtles, Dermochelys coriacea, nesting in French Guiana
Language :	English
Author, co-author :	Guirlet, Elodie [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
	Das, Krishna [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
	Thomé, Jean-Pierre [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Ecologie animale et écotoxicologie >]
	Girondot, Marc [Laboratoire Écologie, Systématique et Évolution (UMR8079), Université Paris-Sud, Bâtiment 362, 91405 Orsay, France > > > >]
Publication date :	Apr-2010
Journal title :	Chemosphere
Publisher :	Elsevier Science
Volume :	79
Issue/season :	7
Pages :	720-726
Audience :	International
ISSN :	0045-6535
City :	Oxford
Country :	United Kingdom
Keywords :	[en] marine turtles ; PCBs ; OCPs ; eggs ; blood ; spatial and temporal variation
Abstract :	[en] We examined the maternal transfer of organochlorine contaminants (OCs), pesticides (DDTS and HCHs) 26 and polychlorinated biphenyls (PCBs), and the temporal variation of blood and eggs concentrations from 27 38 leatherback turtles (Dermochelys coriacea) nesting in French Guiana. PCBs were found to be the dom- 28 inant OCs with respective mean concentrations of 55.14 ng g 1 lipid-mass for egg and 1.26 ng mL 1 wet- 29 mass for blood. OC concentrations were lower than concentrations measured in other marine turtles 30 which might be due to the lower trophic position (diet based on gelatinous zooplankton) and to the loca- 31 tion of their foraging and nesting grounds. All OCs detected in leatherback blood were detected in eggs, 32 suggesting a maternal transfer of OCs. This transfer was shown to depend on female blood concentration 33 for RDDTs and for the most prevalent PCB congeners, since significant relationships were found between 34 paired blood–egg concentrations. During the nesting season, OC concentrations in eggs and the percent- 35 age of lipid in eggs were found to decline in successive clutches, highlighting a process of offloading from 36 females to their eggs and a decreasing investment of lipid from females into their clutches. OCs in eggs 37 tended to be higher in females spending 3 years in the foraging grounds between two nesting seasons 38 than in those spending 2 years, suggesting an impact of time spacing two breeding seasons, called remi- 39 gration interval, and of location of the foraging grounds.
Research units :	Centre Interfacultaire de Recherches en Océanologie - MARE
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/5338
DOI :	10.1016/j.chemosphere.2010.02.047

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Open access	2010 Chemosphere Guirlet.pdf		Publisher postprint	370.51 kB	View/Open

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