Vertical distribution of lipids, fatty acids and organochlorine contaminants in the blubber of southern hemisphere humpback whales (Megaptera novaeangliae)
Persistent organic pollutants (POPs), such as toxic lipophilic organochlorine (OC) compounds, accumulate in the blubber tissue of marine mammals. Toxicological sampling methods most frequently target only the superficial blubber layer. Vertical distribution of these contaminants through the blubber...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:323338 2023-05-15T13:49:28+02:00 Vertical distribution of lipids, fatty acids and organochlorine contaminants in the blubber of southern hemisphere humpback whales (Megaptera novaeangliae) Waugh, Courtney A. Nichols, Peter D. Schlabach, Martin Noad, Michael Bengtson Nash, Susan 2014-01-01 https://espace.library.uq.edu.au/view/UQ:323338 eng eng Elsevier doi:10.1016/j.marenvres.2013.11.004 issn:0141-1136 issn:1879-0291 orcid:0000-0001-5234-4137 orcid:0000-0002-2799-8320 Not set Antarctica Blubber stratification Fatty acids Lipids Persistent organic pollutants Southern hemisphere humpback whales 1104 Aquatic Science 1910 Oceanography 2310 Pollution Journal Article 2014 ftunivqespace https://doi.org/10.1016/j.marenvres.2013.11.004 2020-12-15T01:07:25Z Persistent organic pollutants (POPs), such as toxic lipophilic organochlorine (OC) compounds, accumulate in the blubber tissue of marine mammals. Toxicological sampling methods most frequently target only the superficial blubber layer. Vertical distribution of these contaminants through the blubber mantle may, however, not be homogenous and could reflect any dissemination of lipids and fatty acids (FAs). It is therefore critical to assess stratification patterns in a species of interest as a quality control measure for interpretation of toxicological data. Here, we analysed and compared the distribution of lipids, FAs, and OCs in the outermost and innermost blubber layer of southern hemisphere humpback whales. FA stratification was evident for short-chain (≤18) monounsaturated fatty acids (SC-MUFA), which were concentrated in the outer layer, consistent with the thermoregulatory role of this blubber layer. This stratification was, however, not reflected in OC distribution, which was similar in the inner and outer blubber layers of male humpback whales. By comparison, a noticeable gradient in total blubber lipid from the outer to the inner layer was observed in two lactating females, which coincided with higher lipid normalised contaminant levels in the inner layer. This study contains the most comprehensive assessment of humpback whale blubber stratification to date, however, further investigation of biological and ecological influencing factors is required. Article in Journal/Newspaper Antarc* Antarctica Humpback Whale Megaptera novaeangliae The University of Queensland: UQ eSpace Marine Environmental Research 94 24 31 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Antarctica Blubber stratification Fatty acids Lipids Persistent organic pollutants Southern hemisphere humpback whales 1104 Aquatic Science 1910 Oceanography 2310 Pollution |
spellingShingle |
Antarctica Blubber stratification Fatty acids Lipids Persistent organic pollutants Southern hemisphere humpback whales 1104 Aquatic Science 1910 Oceanography 2310 Pollution Waugh, Courtney A. Nichols, Peter D. Schlabach, Martin Noad, Michael Bengtson Nash, Susan Vertical distribution of lipids, fatty acids and organochlorine contaminants in the blubber of southern hemisphere humpback whales (Megaptera novaeangliae) |
topic_facet |
Antarctica Blubber stratification Fatty acids Lipids Persistent organic pollutants Southern hemisphere humpback whales 1104 Aquatic Science 1910 Oceanography 2310 Pollution |
description |
Persistent organic pollutants (POPs), such as toxic lipophilic organochlorine (OC) compounds, accumulate in the blubber tissue of marine mammals. Toxicological sampling methods most frequently target only the superficial blubber layer. Vertical distribution of these contaminants through the blubber mantle may, however, not be homogenous and could reflect any dissemination of lipids and fatty acids (FAs). It is therefore critical to assess stratification patterns in a species of interest as a quality control measure for interpretation of toxicological data. Here, we analysed and compared the distribution of lipids, FAs, and OCs in the outermost and innermost blubber layer of southern hemisphere humpback whales. FA stratification was evident for short-chain (≤18) monounsaturated fatty acids (SC-MUFA), which were concentrated in the outer layer, consistent with the thermoregulatory role of this blubber layer. This stratification was, however, not reflected in OC distribution, which was similar in the inner and outer blubber layers of male humpback whales. By comparison, a noticeable gradient in total blubber lipid from the outer to the inner layer was observed in two lactating females, which coincided with higher lipid normalised contaminant levels in the inner layer. This study contains the most comprehensive assessment of humpback whale blubber stratification to date, however, further investigation of biological and ecological influencing factors is required. |
format |
Article in Journal/Newspaper |
author |
Waugh, Courtney A. Nichols, Peter D. Schlabach, Martin Noad, Michael Bengtson Nash, Susan |
author_facet |
Waugh, Courtney A. Nichols, Peter D. Schlabach, Martin Noad, Michael Bengtson Nash, Susan |
author_sort |
Waugh, Courtney A. |
title |
Vertical distribution of lipids, fatty acids and organochlorine contaminants in the blubber of southern hemisphere humpback whales (Megaptera novaeangliae) |
title_short |
Vertical distribution of lipids, fatty acids and organochlorine contaminants in the blubber of southern hemisphere humpback whales (Megaptera novaeangliae) |
title_full |
Vertical distribution of lipids, fatty acids and organochlorine contaminants in the blubber of southern hemisphere humpback whales (Megaptera novaeangliae) |
title_fullStr |
Vertical distribution of lipids, fatty acids and organochlorine contaminants in the blubber of southern hemisphere humpback whales (Megaptera novaeangliae) |
title_full_unstemmed |
Vertical distribution of lipids, fatty acids and organochlorine contaminants in the blubber of southern hemisphere humpback whales (Megaptera novaeangliae) |
title_sort |
vertical distribution of lipids, fatty acids and organochlorine contaminants in the blubber of southern hemisphere humpback whales (megaptera novaeangliae) |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://espace.library.uq.edu.au/view/UQ:323338 |
genre |
Antarc* Antarctica Humpback Whale Megaptera novaeangliae |
genre_facet |
Antarc* Antarctica Humpback Whale Megaptera novaeangliae |
op_relation |
doi:10.1016/j.marenvres.2013.11.004 issn:0141-1136 issn:1879-0291 orcid:0000-0001-5234-4137 orcid:0000-0002-2799-8320 Not set |
op_doi |
https://doi.org/10.1016/j.marenvres.2013.11.004 |
container_title |
Marine Environmental Research |
container_volume |
94 |
container_start_page |
24 |
op_container_end_page |
31 |
_version_ |
1766251419459911680 |