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.
journal_name
Chemospherejournal_title
Chemosphereauthors
Lailson-Brito J,Dorneles PR,Azevedo-Silva CE,Azevedo Ade F,Vidal LG,Marigo J,Bertozzi C,Zanelatto RC,Bisi TL,Malm O,Torres JPdoi
10.1016/j.chemosphere.2011.06.018subject
Has Abstractpub_date
2011-08-01 00:00:00pages
882-7issue
7eissn
0045-6535issn
1879-1298pii
S0045-6535(11)00661-8journal_volume
84pub_type
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