Validating the use of biopsy sampling in contamination assessment studies of small cetaceans
| Autor: | Rosalinda Carmela Montone, Paola Galluzzi Polesi, Marcos César de Oliveira Santos, Satie Taniguchi, Paula Méndez-Fernandez |
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| Rok vydání: | 2016 |
| Předmět: |
Male
0106 biological sciences Biopsy EMISSÁRIOS SUBMARINOS 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences DDT chemistry.chemical_compound Polybrominated diphenyl ethers Stenella biology.animal Blubber Halogenated Diphenyl Ethers Hexachlorobenzene medicine Animals 0105 earth and related environmental sciences biology medicine.diagnostic_test 010604 marine biology & hydrobiology Sampling (statistics) Aquatic animal Contamination Polychlorinated Biphenyls Pollution Adipose Tissue chemistry Chlordan Environmental chemistry Female Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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