Levels and profiles of chlorinated and brominated contaminants in Southern Hemisphere humpback whales, Megaptera novaeangliae
The study documents the levels and profiles of selected contaminants [polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs) and methoxylated PBDEs (MeO-PBDEs)] in blubber biopsy samples collected from humpback whales (. Megaptera novaeangliae) in...
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Academic Press
2015
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:401818 2023-05-15T13:59:08+02:00 Levels and profiles of chlorinated and brominated contaminants in Southern Hemisphere humpback whales, Megaptera novaeangliae Dorneles, Paulo R. Lailson-Brito, Jose Secchi, Eduardo R. Dirtu, Alin C. Weijs, Liesbeth Dalla Rosa, Luciano Bassoi, Manuela Cunha, Haydee A. Azevedo, Alexandre F. Covaci, Adrian 2015-04-01 https://espace.library.uq.edu.au/view/UQ:401818 eng eng Academic Press doi:10.1016/j.envres.2015.02.007 issn:1096-0953 issn:0013-9351 orcid:0000-0002-2399-1711 Not set PQ-2 PQ-1D PQ 307843/2011- 4 Antarctic Peninsula Discriminant function analysis Marine mammals Methoxylated PBDEs Organohalogen compounds Polar areas 2300 Environmental Science 1303 Biochemistry Journal Article 2015 ftunivqespace https://doi.org/10.1016/j.envres.2015.02.007 2020-11-17T02:21:22Z The study documents the levels and profiles of selected contaminants [polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs) and methoxylated PBDEs (MeO-PBDEs)] in blubber biopsy samples collected from humpback whales (. Megaptera novaeangliae) in Antarctic Peninsula waters. In addition, we investigated year-to-year and sex-related differences in the bioaccumulation patterns. Except for hexachlorobenzene (HCB), whose concentrations were in the same range as those found in whales from the Northern Hemisphere, levels of all other compounds were lower in Southern Hemisphere whales compared to literature data on animals from the Arctic and subarctic region. The mean contribution to the sum of all anthropogenic organohalogen compounds (σOHC) decreased in the following order σPCBs (44%)>HCB (31%)>σDDXs (13%)>σCHLs (4.6%)>σHCHs (4.4%)>σPBDEs (0.9%). The predominant compounds within each chemical class were: PCBs 153, 149, 101 and 138; p,p'-DDE; γ-HCH; trans-nonachlor, PBDEs 99 and 47. The most dominant MeO-PBDE congener was 6-MeO-BDE 47. As samples were collected during three consecutive summer seasons, year-to-year trends could be assessed indicating a significant decrease from 2000 to 2003 for σCHL levels. Higher σPBDE concentrations and higher values of the σPBDE / σMeO-PBDE ratio, as well as higher ratios between the two MeO-BDEs (2'-MeO-BDE 68/6-MeO-BDE 47) were found in females compared to males. Higher σMeO-PBDE concentrations and higher values of the ratios between the lower chlorinated and the higher chlorinated PCBs were found in males than in females. In addition, five out of six significant differences found through discriminant function analysis were gender-related. The literature reports both feeding in mid- to low-latitudes and sex-related differences in migration patterns for humpback whales from the Southern Hemisphere, indicating that the hypothesis of dietary differences between males and females cannot be excluded. Nevertheless, additional studies are required for further investigation of this hypothesis. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Arctic Megaptera novaeangliae Subarctic The University of Queensland: UQ eSpace Antarctic Antarctic Peninsula Arctic Environmental Research 138 49 57 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Antarctic Peninsula Discriminant function analysis Marine mammals Methoxylated PBDEs Organohalogen compounds Polar areas 2300 Environmental Science 1303 Biochemistry |
spellingShingle |
Antarctic Peninsula Discriminant function analysis Marine mammals Methoxylated PBDEs Organohalogen compounds Polar areas 2300 Environmental Science 1303 Biochemistry Dorneles, Paulo R. Lailson-Brito, Jose Secchi, Eduardo R. Dirtu, Alin C. Weijs, Liesbeth Dalla Rosa, Luciano Bassoi, Manuela Cunha, Haydee A. Azevedo, Alexandre F. Covaci, Adrian Levels and profiles of chlorinated and brominated contaminants in Southern Hemisphere humpback whales, Megaptera novaeangliae |
topic_facet |
Antarctic Peninsula Discriminant function analysis Marine mammals Methoxylated PBDEs Organohalogen compounds Polar areas 2300 Environmental Science 1303 Biochemistry |
description |
The study documents the levels and profiles of selected contaminants [polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs) and methoxylated PBDEs (MeO-PBDEs)] in blubber biopsy samples collected from humpback whales (. Megaptera novaeangliae) in Antarctic Peninsula waters. In addition, we investigated year-to-year and sex-related differences in the bioaccumulation patterns. Except for hexachlorobenzene (HCB), whose concentrations were in the same range as those found in whales from the Northern Hemisphere, levels of all other compounds were lower in Southern Hemisphere whales compared to literature data on animals from the Arctic and subarctic region. The mean contribution to the sum of all anthropogenic organohalogen compounds (σOHC) decreased in the following order σPCBs (44%)>HCB (31%)>σDDXs (13%)>σCHLs (4.6%)>σHCHs (4.4%)>σPBDEs (0.9%). The predominant compounds within each chemical class were: PCBs 153, 149, 101 and 138; p,p'-DDE; γ-HCH; trans-nonachlor, PBDEs 99 and 47. The most dominant MeO-PBDE congener was 6-MeO-BDE 47. As samples were collected during three consecutive summer seasons, year-to-year trends could be assessed indicating a significant decrease from 2000 to 2003 for σCHL levels. Higher σPBDE concentrations and higher values of the σPBDE / σMeO-PBDE ratio, as well as higher ratios between the two MeO-BDEs (2'-MeO-BDE 68/6-MeO-BDE 47) were found in females compared to males. Higher σMeO-PBDE concentrations and higher values of the ratios between the lower chlorinated and the higher chlorinated PCBs were found in males than in females. In addition, five out of six significant differences found through discriminant function analysis were gender-related. The literature reports both feeding in mid- to low-latitudes and sex-related differences in migration patterns for humpback whales from the Southern Hemisphere, indicating that the hypothesis of dietary differences between males and females cannot be excluded. Nevertheless, additional studies are required for further investigation of this hypothesis. |
format |
Article in Journal/Newspaper |
author |
Dorneles, Paulo R. Lailson-Brito, Jose Secchi, Eduardo R. Dirtu, Alin C. Weijs, Liesbeth Dalla Rosa, Luciano Bassoi, Manuela Cunha, Haydee A. Azevedo, Alexandre F. Covaci, Adrian |
author_facet |
Dorneles, Paulo R. Lailson-Brito, Jose Secchi, Eduardo R. Dirtu, Alin C. Weijs, Liesbeth Dalla Rosa, Luciano Bassoi, Manuela Cunha, Haydee A. Azevedo, Alexandre F. Covaci, Adrian |
author_sort |
Dorneles, Paulo R. |
title |
Levels and profiles of chlorinated and brominated contaminants in Southern Hemisphere humpback whales, Megaptera novaeangliae |
title_short |
Levels and profiles of chlorinated and brominated contaminants in Southern Hemisphere humpback whales, Megaptera novaeangliae |
title_full |
Levels and profiles of chlorinated and brominated contaminants in Southern Hemisphere humpback whales, Megaptera novaeangliae |
title_fullStr |
Levels and profiles of chlorinated and brominated contaminants in Southern Hemisphere humpback whales, Megaptera novaeangliae |
title_full_unstemmed |
Levels and profiles of chlorinated and brominated contaminants in Southern Hemisphere humpback whales, Megaptera novaeangliae |
title_sort |
levels and profiles of chlorinated and brominated contaminants in southern hemisphere humpback whales, megaptera novaeangliae |
publisher |
Academic Press |
publishDate |
2015 |
url |
https://espace.library.uq.edu.au/view/UQ:401818 |
geographic |
Antarctic Antarctic Peninsula Arctic |
geographic_facet |
Antarctic Antarctic Peninsula Arctic |
genre |
Antarc* Antarctic Antarctic Peninsula Arctic Megaptera novaeangliae Subarctic |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Arctic Megaptera novaeangliae Subarctic |
op_relation |
doi:10.1016/j.envres.2015.02.007 issn:1096-0953 issn:0013-9351 orcid:0000-0002-2399-1711 Not set PQ-2 PQ-1D PQ 307843/2011- 4 |
op_doi |
https://doi.org/10.1016/j.envres.2015.02.007 |
container_title |
Environmental Research |
container_volume |
138 |
container_start_page |
49 |
op_container_end_page |
57 |
_version_ |
1766267551130583040 |