Fatty acids in the blubber of minke whales (Balaenoptera acutorostrata) -stratification and relation to diets
The fatty acid (FA) composition of 37 minke whales (Balaenoptera acutorostrata) from 4 different areas, Spitsbergen, Bjørnøya, Vesterålen and the North Sea was determined. Stratification between inner, middle and outer blubber was present. Most saturated fatty acids (SFAs) and monounsaturated fatty...
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Universitetet i Tromsø
2011
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ftunivtroemsoe:oai:munin.uit.no:10037/3518 2024-06-02T08:03:54+00:00 Fatty acids in the blubber of minke whales (Balaenoptera acutorostrata) -stratification and relation to diets Gade-Sørensen, Lars Aage 2011-05-16 https://hdl.handle.net/10037/3518 eng eng Universitetet i Tromsø University of Tromsø https://hdl.handle.net/10037/3518 URN:NBN:no-uit_munin_3239 Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0) openAccess Copyright 2011 The Author(s) https://creativecommons.org/licenses/by-nc-sa/3.0 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Kjemi: 440::Organisk kjemi: 441 VDP::Mathematics and natural science: 400::Chemistry: 440::Organic chemistry: 441 BIO-3950 Master thesis Mastergradsoppgave 2011 ftunivtroemsoe 2024-05-07T08:43:25Z The fatty acid (FA) composition of 37 minke whales (Balaenoptera acutorostrata) from 4 different areas, Spitsbergen, Bjørnøya, Vesterålen and the North Sea was determined. Stratification between inner, middle and outer blubber was present. Most saturated fatty acids (SFAs) and monounsaturated fatty acids (MUFAs) with 20 and 22 carbon atoms had a higher relative amount in the inner blubber while short-chain MUFAs with 14, 16, 17 and 18 carbon atoms had a higher amount in the outer blubber. Whales from the different areas had a different fatty acid composition in inner blubber layer, but a more similar FA composition in outer blubber layer. The inner blubber layer were found different from all potential prey species, even though prey species from expected and observed diets were found with most similar fatty acid composition as the inner blubber layer. Fatty Acid Trophic Markers (FATMs) indicating the copepod Calanus sp. based food-webs, were found in high relative numbers with all whale samples from all areas, FATMS indicating diatoms were found with Spitsbergen/Bjørnøya samples, and FATMs indicating dinoflagellates were found with samples from Vesterålen and the North Sea. FA profiles have the potential in bio monitoring minke whale diet, but more study of the influence of metabolism in FA incorporation of blubber are needed. Master Thesis Balaenoptera acutorostrata Bjørnøya minke whale Vesterålen Spitsbergen University of Tromsø: Munin Open Research Archive Vesterålen ENVELOPE(14.939,14.939,68.754,68.754) Bjørnøya ENVELOPE(-67.250,-67.250,-68.151,-68.151) |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Kjemi: 440::Organisk kjemi: 441 VDP::Mathematics and natural science: 400::Chemistry: 440::Organic chemistry: 441 BIO-3950 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Kjemi: 440::Organisk kjemi: 441 VDP::Mathematics and natural science: 400::Chemistry: 440::Organic chemistry: 441 BIO-3950 Gade-Sørensen, Lars Aage Fatty acids in the blubber of minke whales (Balaenoptera acutorostrata) -stratification and relation to diets |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Kjemi: 440::Organisk kjemi: 441 VDP::Mathematics and natural science: 400::Chemistry: 440::Organic chemistry: 441 BIO-3950 |
description |
The fatty acid (FA) composition of 37 minke whales (Balaenoptera acutorostrata) from 4 different areas, Spitsbergen, Bjørnøya, Vesterålen and the North Sea was determined. Stratification between inner, middle and outer blubber was present. Most saturated fatty acids (SFAs) and monounsaturated fatty acids (MUFAs) with 20 and 22 carbon atoms had a higher relative amount in the inner blubber while short-chain MUFAs with 14, 16, 17 and 18 carbon atoms had a higher amount in the outer blubber. Whales from the different areas had a different fatty acid composition in inner blubber layer, but a more similar FA composition in outer blubber layer. The inner blubber layer were found different from all potential prey species, even though prey species from expected and observed diets were found with most similar fatty acid composition as the inner blubber layer. Fatty Acid Trophic Markers (FATMs) indicating the copepod Calanus sp. based food-webs, were found in high relative numbers with all whale samples from all areas, FATMS indicating diatoms were found with Spitsbergen/Bjørnøya samples, and FATMs indicating dinoflagellates were found with samples from Vesterålen and the North Sea. FA profiles have the potential in bio monitoring minke whale diet, but more study of the influence of metabolism in FA incorporation of blubber are needed. |
format |
Master Thesis |
author |
Gade-Sørensen, Lars Aage |
author_facet |
Gade-Sørensen, Lars Aage |
author_sort |
Gade-Sørensen, Lars Aage |
title |
Fatty acids in the blubber of minke whales (Balaenoptera acutorostrata) -stratification and relation to diets |
title_short |
Fatty acids in the blubber of minke whales (Balaenoptera acutorostrata) -stratification and relation to diets |
title_full |
Fatty acids in the blubber of minke whales (Balaenoptera acutorostrata) -stratification and relation to diets |
title_fullStr |
Fatty acids in the blubber of minke whales (Balaenoptera acutorostrata) -stratification and relation to diets |
title_full_unstemmed |
Fatty acids in the blubber of minke whales (Balaenoptera acutorostrata) -stratification and relation to diets |
title_sort |
fatty acids in the blubber of minke whales (balaenoptera acutorostrata) -stratification and relation to diets |
publisher |
Universitetet i Tromsø |
publishDate |
2011 |
url |
https://hdl.handle.net/10037/3518 |
long_lat |
ENVELOPE(14.939,14.939,68.754,68.754) ENVELOPE(-67.250,-67.250,-68.151,-68.151) |
geographic |
Vesterålen Bjørnøya |
geographic_facet |
Vesterålen Bjørnøya |
genre |
Balaenoptera acutorostrata Bjørnøya minke whale Vesterålen Spitsbergen |
genre_facet |
Balaenoptera acutorostrata Bjørnøya minke whale Vesterålen Spitsbergen |
op_relation |
https://hdl.handle.net/10037/3518 URN:NBN:no-uit_munin_3239 |
op_rights |
Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0) openAccess Copyright 2011 The Author(s) https://creativecommons.org/licenses/by-nc-sa/3.0 |
_version_ |
1800748499697926144 |