title: Organochlorine concentrations in franciscana dolphins, Pontoporia blainvillei, from Brazilian waters.
abstract: Blubber samples were collected from ten franciscana dolphins either incidentally captured in fishing operations or stranded on São Paulo (SP) and Paraná (PR) states littoral, Southeastern and Southern Brazilian coast, respectively. Determination of PCB, DDT and HCB concentrations were performed by capillary gas chromatograph coupled to electron capture detector (ECD). ΣDDT, ΣPCB and HCB concentrations ranged from 264 ng g(-1) to 5811 ng g(-1) lipid, from 909 ng g(-1) to 5849 ng g(-1) lipid and from 10 ng g(-1) to 61 ng g(-1) lipid, respectively. Regarding DDTs, the distribution of the mean percentages decreased in the following order: p,p'-DDE>p,p'-DDD>p,p'-DDT. The ΣDDT/ΣPCB ratio varied between 0.27 and 0.42 in Northern and Central SP coast, while in Southern SP and PR coast the values were 1.6 and 1.9, respectively. Dissimilarities in ΣDDT/ΣPCB ratios point to different sources of organochlorine compounds to franciscana dolphins in the study area. Considering the endocrine disruptive action of organochlorine compounds, the concentrations found in franciscana dolphins from Brazilian waters may represent an additional obstacle to the conservation of this endangered cetacean species.
authors: Laboratório de Mamíferos Aquáticos e Bioindicadores Profa. Izabel Gurgel (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524 sala 4002, 20550-013, Maracanã, Rio de Janeiro, RJ, Brazil. lailson@uerj.br
authors: José
authors: J
authors: Lailson-Brito
authors: Paulo Renato
authors: PR
authors: Dorneles
authors: Cláudio Eduardo
authors: CE
authors: Azevedo-Silva
authors: Alexandre de Freitas
authors: Ade F
authors: Azevedo
authors: Lara Gama
authors: LG
authors: Vidal
authors: Juliana
authors: J
authors: Marigo
authors: Carolina
authors: C
authors: Bertozzi
authors: Regina Célia
authors: RC
authors: Zanelatto
authors: Tatiana Lemos
authors: TL
authors: Bisi
authors: Olaf
authors: O
authors: Malm
authors: João Paulo Machado
authors: JP
authors: Torres
mesh_terms: D000818:Animals; D001938:Brazil; D003634:DDT / Q000378:metabolism; D004289:Dolphins / Q000378:metabolism*; D004784:Environmental Monitoring; D005260:Female; D006581:Hexachlorobenzene / Q000378:metabolism; D006843:Hydrocarbons, Chlorinated / Q000378:metabolism*; D008297:Male; D010575:Pesticides / Q000378:metabolism; D011078:Polychlorinated Biphenyls / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D014874:Water Pollutants, Chemical; D006581:Hexachlorobenzene; D003634:DDT; D011078:Polychlorinated Biphenyls