Metabolic Concentration of Lipid Soluble Organochlorine Burdens in Humpback Whales Through Migration and Fasting
Southern hemisphere humpback whales undertake the longest migrations and associated periods of fasting of any mammal. Fluctuations in lipid energy stores are known to profoundly affect the toxicokinetics of lipophilic organochlorine compound (OC) burdens. Results from blubber biopsy sampling of adul...
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American Chemical Society
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Online Access: | http://hdl.handle.net/10072/56104 https://doi.org/10.1021/es401441n |
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ftgriffithuniv:oai:research-repository.griffith.edu.au:10072/56104 2023-05-15T13:37:02+02:00 Metabolic Concentration of Lipid Soluble Organochlorine Burdens in Humpback Whales Through Migration and Fasting Bengtson Nash, Susan A. Waugh, Courtney Schlabach, Martin 2013 http://hdl.handle.net/10072/56104 https://doi.org/10.1021/es401441n English eng American Chemical Society Environmental Science and Technology Self-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the authors for more information. Environmental Chemistry (incl. Atmospheric Chemistry) Journal article 2013 ftgriffithuniv https://doi.org/10.1021/es401441n 2018-07-30T10:48:16Z Southern hemisphere humpback whales undertake the longest migrations and associated periods of fasting of any mammal. Fluctuations in lipid energy stores are known to profoundly affect the toxicokinetics of lipophilic organochlorine compound (OC) burdens. Results from blubber biopsy sampling of adult, male humpback whales at two time points of the annual migration journey revealed dramatic concentration effects for the majority of OC compounds. The observed concentration effect was, however, not linear with measured average blubber lipid loss indicating significant redistribution of OCs and hence the importance of alternate lipid depots for meeting the energetic demands of the migration journey. Applying lipophilic OC burdens as novel tracers of whole-body lipid dynamics, the observed average concentration index suggests an average individual weight loss of 13% over 4 months of the migration journey. This value is based upon lipid derived energy and is in good agreement with previous weight prediction formulas. Notably, however, these estimates may greatly underestimate individual weight loss if significant protein catabolism occurs. Biomagnification factors between migrating southern hemisphere humpback whales and their principal prey item, Antarctic krill, closely resembled those of baleen whales feeding on herbivorous zooplankton in the Arctic. This study emphasizes the importance of considering prolonged periods of food deprivation when assessing chemical risks posed to wildlife. This is of particular importance for Polar biota adapted to extremes in ecosystem productivity. Griffith Sciences, Griffith School of Environment No Full Text Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Arctic baleen whales Zooplankton Griffith University: Griffith Research Online Antarctic Arctic Griffith ENVELOPE(-155.500,-155.500,-85.883,-85.883) Environmental Science & Technology 47 16 9404 9413 |
institution |
Open Polar |
collection |
Griffith University: Griffith Research Online |
op_collection_id |
ftgriffithuniv |
language |
English |
topic |
Environmental Chemistry (incl. Atmospheric Chemistry) |
spellingShingle |
Environmental Chemistry (incl. Atmospheric Chemistry) Bengtson Nash, Susan A. Waugh, Courtney Schlabach, Martin Metabolic Concentration of Lipid Soluble Organochlorine Burdens in Humpback Whales Through Migration and Fasting |
topic_facet |
Environmental Chemistry (incl. Atmospheric Chemistry) |
description |
Southern hemisphere humpback whales undertake the longest migrations and associated periods of fasting of any mammal. Fluctuations in lipid energy stores are known to profoundly affect the toxicokinetics of lipophilic organochlorine compound (OC) burdens. Results from blubber biopsy sampling of adult, male humpback whales at two time points of the annual migration journey revealed dramatic concentration effects for the majority of OC compounds. The observed concentration effect was, however, not linear with measured average blubber lipid loss indicating significant redistribution of OCs and hence the importance of alternate lipid depots for meeting the energetic demands of the migration journey. Applying lipophilic OC burdens as novel tracers of whole-body lipid dynamics, the observed average concentration index suggests an average individual weight loss of 13% over 4 months of the migration journey. This value is based upon lipid derived energy and is in good agreement with previous weight prediction formulas. Notably, however, these estimates may greatly underestimate individual weight loss if significant protein catabolism occurs. Biomagnification factors between migrating southern hemisphere humpback whales and their principal prey item, Antarctic krill, closely resembled those of baleen whales feeding on herbivorous zooplankton in the Arctic. This study emphasizes the importance of considering prolonged periods of food deprivation when assessing chemical risks posed to wildlife. This is of particular importance for Polar biota adapted to extremes in ecosystem productivity. Griffith Sciences, Griffith School of Environment No Full Text |
format |
Article in Journal/Newspaper |
author |
Bengtson Nash, Susan A. Waugh, Courtney Schlabach, Martin |
author_facet |
Bengtson Nash, Susan A. Waugh, Courtney Schlabach, Martin |
author_sort |
Bengtson Nash, Susan |
title |
Metabolic Concentration of Lipid Soluble Organochlorine Burdens in Humpback Whales Through Migration and Fasting |
title_short |
Metabolic Concentration of Lipid Soluble Organochlorine Burdens in Humpback Whales Through Migration and Fasting |
title_full |
Metabolic Concentration of Lipid Soluble Organochlorine Burdens in Humpback Whales Through Migration and Fasting |
title_fullStr |
Metabolic Concentration of Lipid Soluble Organochlorine Burdens in Humpback Whales Through Migration and Fasting |
title_full_unstemmed |
Metabolic Concentration of Lipid Soluble Organochlorine Burdens in Humpback Whales Through Migration and Fasting |
title_sort |
metabolic concentration of lipid soluble organochlorine burdens in humpback whales through migration and fasting |
publisher |
American Chemical Society |
publishDate |
2013 |
url |
http://hdl.handle.net/10072/56104 https://doi.org/10.1021/es401441n |
long_lat |
ENVELOPE(-155.500,-155.500,-85.883,-85.883) |
geographic |
Antarctic Arctic Griffith |
geographic_facet |
Antarctic Arctic Griffith |
genre |
Antarc* Antarctic Antarctic Krill Arctic baleen whales Zooplankton |
genre_facet |
Antarc* Antarctic Antarctic Krill Arctic baleen whales Zooplankton |
op_relation |
Environmental Science and Technology |
op_rights |
Self-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the authors for more information. |
op_doi |
https://doi.org/10.1021/es401441n |
container_title |
Environmental Science & Technology |
container_volume |
47 |
container_issue |
16 |
container_start_page |
9404 |
op_container_end_page |
9413 |
_version_ |
1766087215098626048 |