title: Organochlorine concentrations (PCBs, DDTs, HCHs, HCB and MIREX) in delphinids stranded at the northeastern Brazil.
abstract: Organochlorine compounds are highly persistent in the environment, causing bioaccumulation and biomagnification through the marine food chain. To verify the bioaccumulation pattern of DDT and its metabolites, as well as PCBs, Mirex, HCHs and HCB, samples of subcutaneous adipose tissue from 25 Guiana dolphins (Sotalia guianensis), two Fraser's dolphins (Lagenodelphis hosei), two spinner dolphins (Stenella longirostris), one spotted dolphin (Stenella frontalis), and one striped dolphin (Stenella coeruleoalba) were analyzed. The collected specimens were found stranded in northeastern Brazil between 2005 and 2011. The concentrations were reported in μg·g(-1) lip, varying from 0.02 to 17.3 for ΣPCB, from 0.003 to 5.19 for ΣDDT, from 0.005 to 0.16 for ΣHCH, from 0.002 to 0.16 for HCB, and from 0.02 to 2.38 for Mirex. The PCBs dominated the bioaccumulation pattern for both the Guiana and spinner dolphins; for the other species, DDT was the major compound. A discriminant function analysis revealed the differences in the organochlorine accumulation patterns between the Guiana dolphin (S. guianensis) and the continental shelf/oceanic dolphins (S. frontalis and S. longirostris). The results also show that the concentrations of organochlorine compounds found in the delphinids in northeastern Brazil were lower than the delphinids found in other regions of Brazil, as well as other locations worldwide with intense agroindustrial development and/or a larger population.
authors.affiliation: Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Brazil; Programa de Pós-graduação em Saúde Animal nos Trópicos, Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia, Brazil. Electronic address: neto.vet@gmail.com.
authors.forename: Elitieri B
authors.initials: EB
authors.lastname: Santos-Neto
authors.affiliation: Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Brazil. Electronic address: azevedo.silva@gmail.com.
authors.forename: Claudio Eduardo
authors.initials: CE
authors.lastname: Azevedo-Silva
authors.affiliation: Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Brazil. Electronic address: tbisi@yahoo.com.
authors.forename: Tatiana L
authors.initials: TL
authors.lastname: Bisi
authors.affiliation: Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Brazil. Electronic address: jessicasilvauerj@gmail.com.
authors.forename: Jessica
authors.initials: J
authors.lastname: Santos
authors.affiliation: Associação de Pesquisa e Preservação de Ecossistemas Aquáticos (AQUASIS), Caucaia, Ceará, Brazil. Electronic address: cameirelles@yahoo.com.br.
authors.forename: Ana Carolina O
authors.initials: AC
authors.lastname: Meirelles
authors.affiliation: Associação de Pesquisa e Preservação de Ecossistemas Aquáticos (AQUASIS), Caucaia, Ceará, Brazil. Electronic address: vitorluz@yahoo.com.br.
authors.forename: Vitor L
authors.initials: VL
authors.lastname: Carvalho
authors.affiliation: Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Brazil. Electronic address: azevedo.alex@uerj.br.
authors.forename: Alexandre F
authors.initials: AF
authors.lastname: Azevedo
authors.affiliation: Programa de Pós-graduação em Saúde Animal nos Trópicos, Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia, Brazil; Departamento de Anatomia, Patologia e Clínicas/DEAPAC, Universidade Federal da Bahia, Brazil. Electronic address: jeugenio@ufba.br.
authors.forename: José Eugênio
authors.initials: JE
authors.lastname: Guimarães
authors.affiliation: Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Brazil. Electronic address: lailson@uerj.br.
authors.forename: José
authors.initials: J
authors.lastname: Lailson-Brito
mesh_terms: D000818:Animals; D001938:Brazil; D003634:DDT / Q000378:metabolism; D004289:Dolphins / Q000378:metabolism*; D004784:Environmental Monitoring; D005260:Female; D006581:Hexachlorobenzene / Q000378:metabolism; D001556:Hexachlorocyclohexane / Q000378:metabolism; D006843:Hydrocarbons, Chlorinated / Q000378:metabolism*; D008297:Male; D008917:Mirex / Q000378:metabolism; D011078:Polychlorinated Biphenyls / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D006843:Hydrocarbons, Chlorinated; D014874:Water Pollutants, Chemical; D006581:Hexachlorobenzene; D001556:Hexachlorocyclohexane; D003634:DDT; D011078:Polychlorinated Biphenyls; D008917:Mirex
keywords: Bioaccumulation; Cetaceans; Discriminant analysis; Guiana dolphin; Organochlorines