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Niterói, Brazil

Marigo J.,Projeto BioPesca | Marigo J.,Instituto Oswaldo Cruz | Thompson C.C.,Instituto Oswaldo Cruz | Santos C.P.,Instituto Oswaldo Cruz | Iniguez A.M.,Instituto Oswaldo Cruz
Parasitology International | Year: 2011

Synthesium pontoporiae, exclusive parasite of the endangered dolphin, Pontoporia blainvillei, is endemic and restricted to the South Atlantic and belongs to the Brachycladiidae family Odhner, 1905. The study of this family has been limited by the difficulty of accessing the parasites from their marine mammal hosts and as a consequence there is a paucity of genetic information available. Herein we present a genetic analysis using 18S rDNA sequences of S. pontoporiae and S. tursionis and the ND3 mtDNA sequence of S. pontoporiae. The genetic analysis of 18S rDNA sequences of brachycladiids and acanthocolpids determined two major clusters associated with their definitive hosts, marine mammals and fishes, respectively. Considering the tree topology of brachycladiids ND3 mtDNA gene, two clusters were defined, one with the Synthesium species. This work contributes with fundamental genetic information on S. pontoporiae, and suggests a Brachycladiidae genetic evolution related to their hosts. © 2011 Elsevier Ireland Ltd.

Barbato B.H.A.,Grande Rio University | Secchi E.R.,Grande Rio University | Di Beneditto A.P.M.,State University of Norte Fluminense | Ramos R.M.A.,Everest Tecnologia em Servicos Ltda. | And 4 more authors.
Journal of the Marine Biological Association of the United Kingdom | Year: 2012

Four distinct Franciscana Management Areas (FMAs) have been proposed based on several lines of evidence including genotype, phenotype, population response and distribution. To determine if differences in external morphology fit this division, a canonical variate analysis was carried out for males and/or females from FMAs I to IV using up to 14 characters. A total of 78 adult specimens were analysed. More than 90% of the differences between groups were summarized by three canonical variates. Females were larger than males in all areas. Females from FMA IV were of intermediate length between those from FMA I and FMA III and individuals from FMA II were smaller than those from all other areas. Position of dorsal fin and morphology of the anterior body region, differentiate individuals from FMA I and FMA III. Morphological differences found in this study give additional support for the proposed FMAs. Since habitat characteristics and franciscana feeding ecology vary regionally, it is possible that observed morphological differences are due to ecological divergence for niche occupation. The indication of a discontinuous distribution, consistency between genetic and morphological evidence, and a short time genetic divergence, might indicate that franciscanas inhabiting FMA I represent a distinct subspecies. © 2012 Marine Biological Association of the United Kingdom.

Lailson-Brito J.,State University of Rio de Janeiro | Dorneles P.R.,Federal University of Rio de Janeiro | Azevedo-Silva C.E.,Federal University of Rio de Janeiro | Azevedo A.D.F.,State University of Rio de Janeiro | And 7 more authors.
Chemosphere | Year: 2011

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 264ngg-1 to 5811ngg-1 lipid, from 909ngg-1 to 5849ngg-1 lipid and from 10ngg-1 to 61ngg-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. © 2011 Elsevier Ltd.

Alonso M.B.,Federal University of Rio de Janeiro | Alonso M.B.,State University of Rio de Janeiro | Eljarrat E.,IDAEA | Gorga M.,IDAEA | And 14 more authors.
Environmental Pollution | Year: 2012

Liver samples from 53 Franciscana dolphins along the Brazilian coast were analyzed for organobrominated compounds. Target substances included the following anthropogenic pollutants: polybrominated diphenyl ethers (PBDEs), polybrominated biphenyls (PBBs), pentabromoethylbenzene (PBEB), hexabromobenzene (HBB), decabromodiphenylethane (DBDPE), as well as the naturally-generated methoxylated-PBDEs (MeO-PBDEs). PBDE concentrations ranged from 6 to 1797 ng/g lw (mean 166 ± 298 ng/g lw) and were similar to those observed in cetaceans from Northern Hemisphere. PBBs were found in all sampling locations (

Leonel J.,Federal University of Bahia | Sericano J.L.,Texas A&M University | Secchi E.R.,Institute Oceanografia | Bertozzi C.,Projeto BioPesca | And 2 more authors.
Science of the Total Environment | Year: 2014

Total PBDE concentrations determined in archived blubber samples from franciscana dolphins (Pontoporia blainvillei) unintentionally captured in the Brazilian coastal region off Rio Grande do Sul State (FMA III) between 1994 and 2004 (n=73) ranged from 7.9 to 65ngg-1 lipid weight in mature males, with an increase over the ten-year period. Total PBDE concentrations in blubber samples collected from the FAM II (n=41) between 2002 and 2005 were higher (67.8 to 763.7ngg-1lw) than those from FMA III. This is possibly due to the proximity to important industrial development sites in the state of Sa&tild;o Paulo. Despite the differences in total concentrations, PBDE profiles were comparable and the PBDE concentrations decreased in the following order BDE 47>BDE99>BDE 100 for both FMA and for males and females as well as adults, juveniles and pups. © 2014 Elsevier B.V.

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