Lipid composition of stomach oil in a procellariiform seabird Puffinus tenuirostris: implications for food web studies
Some procellariiform seabirds use a dual strategy for provisioning their chicks by alternating between short and long foraging trips (LT). Trophic relationships of adult birds are unknown when they feed for themselves during LT because digestion processes preclude direct prey determination. Since st...
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/29740 2023-05-15T13:46:14+02:00 Lipid composition of stomach oil in a procellariiform seabird Puffinus tenuirostris: implications for food web studies CONNAN, Maëlle MAYZAUD, Patrick BOUTOUTE, Marc WEIMERSKIRCH, Henri CHEREL, Yves 2005 https://oskar-bordeaux.fr/handle/20.500.12278/29740 en eng Inter Research 0171-8630 https://oskar-bordeaux.fr/handle/20.500.12278/29740 http://creativecommons.org/licenses/by/ Antarctica Tasmania Myctophids Trophic interactions Fatty acids Short-tailed shearwater Fatty alcohols Sciences de l'environnement/Biodiversité et Ecologie Sciences de l'environnement/Environnement et Société Sciences de l'environnement/Milieux et Changements globaux Article de revue 2005 ftoskarbordeaux 2021-05-11T22:31:13Z Some procellariiform seabirds use a dual strategy for provisioning their chicks by alternating between short and long foraging trips (LT). Trophic relationships of adult birds are unknown when they feed for themselves during LT because digestion processes preclude direct prey determination. Since stomach contents collected after LT contain oil of dietary origin, we tested the use of oil lipids as prey trophic markers using the Tasmanian short-tailed shearwater Puffinus tenuirostris as a model seabird. The intra-specific variability of stomach oils was investigated through lipid class composition, and their fatty acid and fatty alcohol profiles. Oils mainly consisted of wax esters (WE) and triacylglycerols (TAG) (49 to 86 and 7 to 41%, respectively). Major fatty acids of TAG were in a decreasing order 18:1n-9, 16:0, 16:1n-7, 14:0, 20:5n-3 and 22:6n-3. The WE-fatty acid profiles were dominated by 18:1n-9 and 16:1n-7 while fatty alcohol profiles were dominated by 16:0. Fatty alcohol and fatty acid patterns were tested as possible descriptors of ingested prey (derived from literature data) through multivariate discriminant analyses. Comparisons of the WE fatty alcohol patterns showed a close association with the alcohol structure of 3 myctophid fish species namely Krefftichthys anderssoni, Gymnoscopelus braueri and Electrona antarctica; these results were corroborated by WE fatty acid analysis. Comparison of TAG fatty acid patterns showed the highest similarity between oils and the digestive gland of the myctophid-eater squid Moroteuthis ingens in association with the myctophid Electrona carlsbergi. Hence, biochemical analysis of both WE and TAG strongly suggested that adult short-tailed shearwaters mainly prey upon Antarctic/sub- Antarctic myctophids when they feed for themselves, thus emphasizing the role of these oceanic mesopelagic fish in the marine ecosystem of the Southern Ocean. Other/Unknown Material Antarc* Antarctic Antarctica Puffinus tenuirostris Southern Ocean OSKAR Bordeaux (Open Science Knowledge ARchive) Antarctic Southern Ocean |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Antarctica Tasmania Myctophids Trophic interactions Fatty acids Short-tailed shearwater Fatty alcohols Sciences de l'environnement/Biodiversité et Ecologie Sciences de l'environnement/Environnement et Société Sciences de l'environnement/Milieux et Changements globaux |
spellingShingle |
Antarctica Tasmania Myctophids Trophic interactions Fatty acids Short-tailed shearwater Fatty alcohols Sciences de l'environnement/Biodiversité et Ecologie Sciences de l'environnement/Environnement et Société Sciences de l'environnement/Milieux et Changements globaux CONNAN, Maëlle MAYZAUD, Patrick BOUTOUTE, Marc WEIMERSKIRCH, Henri CHEREL, Yves Lipid composition of stomach oil in a procellariiform seabird Puffinus tenuirostris: implications for food web studies |
topic_facet |
Antarctica Tasmania Myctophids Trophic interactions Fatty acids Short-tailed shearwater Fatty alcohols Sciences de l'environnement/Biodiversité et Ecologie Sciences de l'environnement/Environnement et Société Sciences de l'environnement/Milieux et Changements globaux |
description |
Some procellariiform seabirds use a dual strategy for provisioning their chicks by alternating between short and long foraging trips (LT). Trophic relationships of adult birds are unknown when they feed for themselves during LT because digestion processes preclude direct prey determination. Since stomach contents collected after LT contain oil of dietary origin, we tested the use of oil lipids as prey trophic markers using the Tasmanian short-tailed shearwater Puffinus tenuirostris as a model seabird. The intra-specific variability of stomach oils was investigated through lipid class composition, and their fatty acid and fatty alcohol profiles. Oils mainly consisted of wax esters (WE) and triacylglycerols (TAG) (49 to 86 and 7 to 41%, respectively). Major fatty acids of TAG were in a decreasing order 18:1n-9, 16:0, 16:1n-7, 14:0, 20:5n-3 and 22:6n-3. The WE-fatty acid profiles were dominated by 18:1n-9 and 16:1n-7 while fatty alcohol profiles were dominated by 16:0. Fatty alcohol and fatty acid patterns were tested as possible descriptors of ingested prey (derived from literature data) through multivariate discriminant analyses. Comparisons of the WE fatty alcohol patterns showed a close association with the alcohol structure of 3 myctophid fish species namely Krefftichthys anderssoni, Gymnoscopelus braueri and Electrona antarctica; these results were corroborated by WE fatty acid analysis. Comparison of TAG fatty acid patterns showed the highest similarity between oils and the digestive gland of the myctophid-eater squid Moroteuthis ingens in association with the myctophid Electrona carlsbergi. Hence, biochemical analysis of both WE and TAG strongly suggested that adult short-tailed shearwaters mainly prey upon Antarctic/sub- Antarctic myctophids when they feed for themselves, thus emphasizing the role of these oceanic mesopelagic fish in the marine ecosystem of the Southern Ocean. |
format |
Other/Unknown Material |
author |
CONNAN, Maëlle MAYZAUD, Patrick BOUTOUTE, Marc WEIMERSKIRCH, Henri CHEREL, Yves |
author_facet |
CONNAN, Maëlle MAYZAUD, Patrick BOUTOUTE, Marc WEIMERSKIRCH, Henri CHEREL, Yves |
author_sort |
CONNAN, Maëlle |
title |
Lipid composition of stomach oil in a procellariiform seabird Puffinus tenuirostris: implications for food web studies |
title_short |
Lipid composition of stomach oil in a procellariiform seabird Puffinus tenuirostris: implications for food web studies |
title_full |
Lipid composition of stomach oil in a procellariiform seabird Puffinus tenuirostris: implications for food web studies |
title_fullStr |
Lipid composition of stomach oil in a procellariiform seabird Puffinus tenuirostris: implications for food web studies |
title_full_unstemmed |
Lipid composition of stomach oil in a procellariiform seabird Puffinus tenuirostris: implications for food web studies |
title_sort |
lipid composition of stomach oil in a procellariiform seabird puffinus tenuirostris: implications for food web studies |
publisher |
Inter Research |
publishDate |
2005 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/29740 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Puffinus tenuirostris Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Puffinus tenuirostris Southern Ocean |
op_relation |
0171-8630 https://oskar-bordeaux.fr/handle/20.500.12278/29740 |
op_rights |
http://creativecommons.org/licenses/by/ |
_version_ |
1766238842021478400 |