| Texto completo | |
| Autor(es): |
Mendez-Fernandez, Paula
[1]
;
Polesi, Paola Galluzzi
[1]
;
Taniguchi, Satie
[1]
;
Santos, Marcos C. de O.
[2]
;
Montone, Rosalinda C.
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Oceanog, Lab Quim Organ Marinha, BR-05508120 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Inst Oceanog, Lab Biol Conservacao Mamiferos Aquat, BR-05508120 Sao Paulo, SP - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Marine Pollution Bulletin; v. 107, n. 1, p. 364-369, JUN 15 2016. |
| Citações Web of Science: | 5 |
| Resumo | |
Remote biopsy sampling is the most common technique for acquiring samples from free-ranging marine mammals. However, such techniques may result in variable sampling being sometimes superficial skin and blubber biopsies. For decades, blubber has been used to monitor the exposure of marine mammals to persistent organic pollutants (POPs), but little is known regarding the variability of POPs as a function of blubber depth in small cetaceans and the available literature offers variable results. Thus, the aim of the present study was to validate biopsy sampling for monitoring contaminant concentrations in small, free-ranging cetaceans. Samples from the dorsal blubber of 10 incidentally captured Atlantic spotted dolphins (Stenella frontalis) were separated into two different layers (outer and inner) to investigate the influence of sampling depth on POP concentrations. POP concentrations were compared to those of the full blubber layer. The results revealed no significant differences in lipid content between males and females or among the inner, outer and full blubber layers (p > 0.05). Moreover, the wet and lipid weight concentrations of all POP classes analysed {[}i.e. polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethanes (DDTs), polybrominated diphenyl ethers (PBDEs), hexachlorobenzene (HCB), hexachlorocyclohexanes (HCHs), chlordanes (CHLs) and mirex] did not differ significantly with blubber depth (p > 0.05). POP classes followed the same decreasing order of wet weight concentrations in blubber layers and full blubber: PCBs > DDTs > PBDEs > mirex > HCB > HCHs > CHLs. Moreover, there was a low degree of differentiation in the accumulation of POP congeners. The present findings indicated that the distribution of contaminants was homogenous with blubber depth, which validates the use of biopsy sampling for the assessment of contaminants in small cetaceans. (C) 2016 Elsevier Ltd. All rights reserved. (AU) | |
| Processo FAPESP: | 10/51323-6 - Capturas acidentais de pequenos cetáceos em atividades pesqueiras no litoral sul paulista: buscando subsídios para formulações de política de conservação |
| Beneficiário: | Marcos César de Oliveira Santos |
| Modalidade de apoio: | Auxílio à Pesquisa - Parceria para Inovação Tecnológica - PITE |