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 (
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.
Yogui G.T.,Texas A&M University |
Yogui G.T.,University of Sao Paulo |
Yogui G.T.,Federal University of Pernambuco |
Santos M.C.O.,Projeto Atlantis |
And 3 more authors.
Marine Pollution Bulletin | Year: 2011
Limited information is available in the literature on the levels of brominated flame retardants in the southern hemisphere. This study presents concentrations of polybrominated diphenyl ethers (PBDEs) in the blubber of small cetaceans from the coast of São Paulo (Brazil), southwestern Atlantic. PBDE levels were highest in Stenella frontalis (770ngg -1 lipid) followed by Steno bredanensis (475ngg -1 lipid), Sotalia guianensis (65.6ngg -1 lipid), Tursiops truncatus (64.2ngg -1 lipid) and Pontoporia blainvillei (60.3ngg -1 lipid). In general, continental shelf individuals exhibited higher contamination than inshore animals. This might be related to larger prey items consumed by continental shelf dolphins. The pattern of contamination indicates that Penta-BDE commercial mixtures are a major source of PBDEs to top predators in the southwestern Atlantic. Congeners found in Octa-BDE formulations were not detected in the investigated animals. © 2011 Elsevier Ltd.
Genetic diversity and population structure of Synthesium pontoporiae (Digenea, Brachycladiidae) linked to its definitive host stocks, the endangered Franciscana dolphin, Pontoporia blainvillei (Pontoporiidae) off the coast of Brazil and Argentina
PubMed | Vale do Itajai University, Projeto BioPesca, Federal University of Pelotas, University of the Region of Joinville and 6 more.
Type: Journal Article | Journal: Journal of helminthology | Year: 2015
Pontoporia blainvillei (Gervais and dOrbigny, 1844) is an endangered small cetacean endemic to South America with four Franciscana Management Areas (FMA) recognized as different population stocks. The role of the intestinal parasite Synthesium pontoporiae (Digenea: Brachycladiidae) as a possible biological marker to differentiate P. blainvillei stocks was evaluated using nuclear and mitochondrial DNA markers. Internal transcribed sequence 1 and 2 (ITS1 and ITS2) regions of S. pontoporiae did not show intraspecific variability. The mitochondrial NADH dehydrogenase subunit 3 (ND3) and cytochrome oxidase subunit I (COI) gene sequences suggested lack of population structure in S. pontoporiae and population expansion. The apparent panmixia of S. pontoporiae may be due to the high mobility of one or more of its intermediary hosts. Alternatively, it may be due to the small sample size. This result is incongruent with the previously proposed FMA.
Marigo J.,Projeto BioPesca |
Marigo J.,Instituto Oswaldo Cruz IOC FIOCRUZ |
Ruoppolo V.,Projeto BioPesca |
Rosas F.C.W.,National Institute of Amazonian Research |
And 4 more authors.
Journal of Wildlife Diseases | Year: 2010
From May 1997 to October 2000, 49 Sotalia guianensis (tucuxi dolphin) incidentally caught in fishing nets or stranded in São Paulo (SP) and Paraná (PR) states in Brazil were necropsied. In total, 17 lungs, 35 stomachs, and 30 intestines were analyzed. Contents were washed through a sieve (mesh, 1.50 mm) and examined under a stereoscopic microscope for parasites. Histopathologic analyses were performed in the lungs of five infected dolphins. The nematode Halocercus brasilienste was found in 88% of all lungs examined, inducing moderate-to-severe pneumonia. Braunina cordiformis, Anisakis sp., and acanthocephalans were found in the stomachs. The trematode Synthesium tursionis was the only parasite found in the intestines, and it was identified in 73% of the animals necropsied. No macroscopic lesions were seen due to parasites in the stomachs and intestines analyzed. © Wildlife Disease Association 2010.
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.
Yogui G.T.,University of Sao Paulo |
Santos M.C.O.,Projeto Atlantis |
Bertozzi C.P.,Projeto BioPesca |
Montone R.C.,University of Sao Paulo
Marine Pollution Bulletin | Year: 2010
The State of São Paulo is the most developed area in Brazil and was impacted by persistent organic pollutants for several decades. This study investigated organochlorines in five species of small cetaceans (Pontoporia blainvillei, Stenella frontalis, Sotalia guianensis, Tursiops truncatus and Steno bredanensis) found dead along the coast of São Paulo between 1997 and 2003. DDTs (15.9μgg-1 lipid; mean for all pooled individuals) and PCBs (8.08μgg-1) exhibited the highest concentrations in the animals, reflecting large amounts formerly used in Brazil. Lower levels of mirex (0.149μgg-1), HCB (0.051μgg-1), CHLs (0.008μgg-1) and HCHs (0.007μgg-1) were detected in all species. Residual pattern of DDTs in dolphins suggests that o,p'-DDT is more recalcitrant than p,p'-DDT in the body of the animals and/or the environment. In contrast to p,p'-DDT, residues of o,p'-DDT seem to be preferentially converted into o,p'-DDD rather than o,p'-DDE. © 2010 Elsevier Ltd.
PubMed | Projeto Biopesca, Institute Oceanografia, Federal University of Bahia, Laboratorio Of Microcontaminantes Organicos E Ecotoxicologia Aquatica and 2 more.
Type: | Journal: The 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 65 ng g(-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 763.7 ng g(-1)lw) than those from FMA III. This is possibly due to the proximity to important industrial development sites in the state of So 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.
PubMed | Instituto Adolfo Lutz, Projeto Biopesca, Associacao de Pesquisa e Preservacao de Ecossistemas Aquaticos and University of Sao Paulo
Type: Journal Article | Journal: Journal of comparative pathology | Year: 2015
This study reports the occurrence of renal lesions in cetaceans from the coast of Brazil subjected to necropsy examination between 1996 and 2011. The animals (n=192) were by-caught in fishing nets, were found dead on beaches or died despite attempted rehabilitation. Kidney samples were evaluated grossly and microscopically and, depending on the histopathological findings, immunohistochemical and ultrastructural analyses were conducted. Due to autolysis, a diagnosis was reached in only 128 animals, of which 82 (64.1%) had kidney lesions. Cystic renal disease was the most common lesion observed in 34 cases (26.6%) and these were classified as simple cysts in eight cases (6.3%), polycystic kidney disease in one rough-toothed dolphin (Steno bredanensis), secondary glomerulocystic disease in 16 cases (12.5%) and primary glomerulocystic disease in nine cases (7%). Other lesions included membranous glomerulonephritis (28 cases; 21.9%), membranoproliferative glomerulonephritis (20 cases; 15.6%), lymphoplasmacytic interstitial nephritis (21 cases; 16.4%), lipidosis (19 cases; 14.8%), glomerulosclerosis (8 cases; 6.3%) and pyogranulomatous nephritis(five cases; 3.9%); two of the later were associated with the migration of nematode larvae. Additionally, tubular adenoma was identified in a Franciscana (Pontoporia blainvillei). The pathological implications of these lesions are discussed according the cause of death, age or sex of the animals. Furthermore, the lesions were compared with those of other marine and terrestrial mammals, including man.
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.