title: Comparison of organochlorine pesticides and PCB residues among hawksbill (Eretmochelys imbricata) and green (Chelonia mydas) turtles in the Yucatan Peninsula and their maternal transfer.
abstract: Organochlorine pesticides and PCB (POPs) concentrations were determined in the blood and eggs of green and hawksbill turtles. We compared concentrations between species, analyzed the relationship between turtle size and the POPs concentrations and the relationship between the concentrations in the blood of the nesting turtles and their eggs. We expected higher concentrations in the hawksbill turtle because of its higher trophic level, but concentrations were not higher in all the cases. Significant differences were found in δ-HCH blood concentrations. Lindane, heptachlor epoxide and PCB 101 concentrations were significantly higher in the hawksbill eggs. The relationship between the size of the turtles and the POP concentrations in the eggs of the hawksbills showed a negative correlation. No correlation was found between the size of the female and concentrations in the blood. In eggs, only the hawksbill turtles exhibited negative correlation in the concentration of mirex and PCB 44 and size.
authors.affiliation: Biología y Conservación de Vertebrados, Instituto de Ecología, A.C. Carretera antigua a Coatepec 351, El Haya, Xalapa 91070, Veracruz, Mexico.
authors.forename: Gabriela
authors.initials: G
authors.lastname: García-Besné
authors.affiliation: Biología y Conservación de Vertebrados, Instituto de Ecología, A.C. Carretera antigua a Coatepec 351, El Haya, Xalapa 91070, Veracruz, Mexico. Electronic address: carolina.valdespino@inecol.mx.
authors.forename: Carolina
authors.initials: C
authors.lastname: Valdespino
authors.affiliation: Instituto EPOMEX, Universidad Autónoma de Campeche, Av. Agustin Melgar y Juan de la Barrera s/n, 24039 Campeche, Campeche, Mexico.
authors.forename: Jaime
authors.initials: J
authors.lastname: Rendón-von Osten
mesh_terms: D000818:Animals; D005260:Female; D006534:Heptachlor Epoxide / Q000378:metabolism; D001556:Hexachlorocyclohexane / Q000097:blood / Q000378:metabolism; D006843:Hydrocarbons, Chlorinated / Q000097:blood* / Q000378:metabolism; D018811:Maternal Exposure; D008800:Mexico; D010063:Ovum / Q000378:metabolism*; D010575:Pesticides / Q000097:blood* / Q000378:metabolism; D011078:Polychlorinated Biphenyls / Q000097:blood* / Q000378:metabolism; D013045:Species Specificity; D018709:Statistics, Nonparametric; D014426:Turtles / Q000097:blood* / Q000378:metabolism
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D006534:Heptachlor Epoxide; C086916:delta-hexachlorocyclohexane; D001556:Hexachlorocyclohexane; C009828:2,4,5,2',5'-pentachlorobiphenyl; D011078:Polychlorinated Biphenyls
keywords: Green turtle; Hawksbill; Mexico; Organochlorine pesticides; PCBs; Sea turtle