Food and feeding ecology of the Tasmanian short-tailed shearwater (Puffinus tenuirostris, Temminck): insights from three complementary methods
International audience The diet of seabirds is usually studied by the identification of prey items recovered from their stomachs. This method is however limited to recently ingested prey and to non-digestible hard parts, precluding the determination of marine resources consumed by birds during long...
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ftunivnantes:oai:HAL:hal-00549016v1 2023-05-15T14:04:46+02:00 Food and feeding ecology of the Tasmanian short-tailed shearwater (Puffinus tenuirostris, Temminck): insights from three complementary methods Connan, Maëlle Mayzaud, Patrick Hobson, Keith A. Weimerskirch, Henri Cherel, Yves Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Environment and Climate Change Canada 2010 https://hal.science/hal-00549016 en eng HAL CCSD Springer Verlag hal-00549016 https://hal.science/hal-00549016 ISSN: 0916-8370 EISSN: 1573-868X Journal of Oceanography https://hal.science/hal-00549016 Journal of Oceanography, 2010, 3, pp.19-32 Lipid analyses Top predator Myctophids Southern Ocean Stable isotopes Stomach content [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2010 ftunivnantes 2023-02-08T00:50:36Z International audience The diet of seabirds is usually studied by the identification of prey items recovered from their stomachs. This method is however limited to recently ingested prey and to non-digestible hard parts, precluding the determination of marine resources consumed by birds during long foraging trips. Thus, alternative indirect approaches are necessary to assess the potential importance of digested prey from long-term foraging activity. In this study, we present three complementary techniques to determine the prey of breeding short-tailed shearwaters (Puffinus tenuirostris) when they feed for themselves during long foraging trips: (1) conventional food analysis, (2) stable isotope analysis of carbon and nitrogen signatures (δ13C and δ15N) of plasma, and (3) lipid analysis of stomach oil and the use of fatty acids and fatty alcohols as trophic markers (stomach oil is of dietary origin). Dietary analysis showed that fish dominated by mass over crustaceans (82 and 18%, respectively). Two euphausiids Euphausia vallentini (a sub-Antarctic species) and Nyctiphanes australis (a Tasmanian species), and fish postlarvae represented more than 94% of the total number of food items, with myctophid fish of larger size dominating by mass. Plasma isotopic signature of birds suggested that shearwaters foraged mainly in Antarctic waters (δ13C = -23.8‰), and fed at a trophic level close to that of a myctophid-eater, the king penguin (δ15Nshort-tailed shearwater = 8.7‰, δ15Nking penguin = 9.8‰). Comparisons between fatty -acid and -alcohol patterns of stomach oil wax esters with those of potential prey also suggested a food based on myctophids (Electrona antarctica, Krefftichthys anderssoni and Gymnoscopelus braueri). To conclude, both lipid and stable isotope methods emphasized the importance of myctophids in the nutrition of short-tailed shearwaters during the chick-rearing period when adult birds feed for themselves. This study illustrates the interest of using both direct and indirect methods to determine trophic ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Puffinus tenuirostris Southern Ocean Université de Nantes: HAL-UNIV-NANTES Antarctic Southern Ocean |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Lipid analyses Top predator Myctophids Southern Ocean Stable isotopes Stomach content [SDE]Environmental Sciences |
spellingShingle |
Lipid analyses Top predator Myctophids Southern Ocean Stable isotopes Stomach content [SDE]Environmental Sciences Connan, Maëlle Mayzaud, Patrick Hobson, Keith A. Weimerskirch, Henri Cherel, Yves Food and feeding ecology of the Tasmanian short-tailed shearwater (Puffinus tenuirostris, Temminck): insights from three complementary methods |
topic_facet |
Lipid analyses Top predator Myctophids Southern Ocean Stable isotopes Stomach content [SDE]Environmental Sciences |
description |
International audience The diet of seabirds is usually studied by the identification of prey items recovered from their stomachs. This method is however limited to recently ingested prey and to non-digestible hard parts, precluding the determination of marine resources consumed by birds during long foraging trips. Thus, alternative indirect approaches are necessary to assess the potential importance of digested prey from long-term foraging activity. In this study, we present three complementary techniques to determine the prey of breeding short-tailed shearwaters (Puffinus tenuirostris) when they feed for themselves during long foraging trips: (1) conventional food analysis, (2) stable isotope analysis of carbon and nitrogen signatures (δ13C and δ15N) of plasma, and (3) lipid analysis of stomach oil and the use of fatty acids and fatty alcohols as trophic markers (stomach oil is of dietary origin). Dietary analysis showed that fish dominated by mass over crustaceans (82 and 18%, respectively). Two euphausiids Euphausia vallentini (a sub-Antarctic species) and Nyctiphanes australis (a Tasmanian species), and fish postlarvae represented more than 94% of the total number of food items, with myctophid fish of larger size dominating by mass. Plasma isotopic signature of birds suggested that shearwaters foraged mainly in Antarctic waters (δ13C = -23.8‰), and fed at a trophic level close to that of a myctophid-eater, the king penguin (δ15Nshort-tailed shearwater = 8.7‰, δ15Nking penguin = 9.8‰). Comparisons between fatty -acid and -alcohol patterns of stomach oil wax esters with those of potential prey also suggested a food based on myctophids (Electrona antarctica, Krefftichthys anderssoni and Gymnoscopelus braueri). To conclude, both lipid and stable isotope methods emphasized the importance of myctophids in the nutrition of short-tailed shearwaters during the chick-rearing period when adult birds feed for themselves. This study illustrates the interest of using both direct and indirect methods to determine trophic ... |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Environment and Climate Change Canada |
format |
Article in Journal/Newspaper |
author |
Connan, Maëlle Mayzaud, Patrick Hobson, Keith A. Weimerskirch, Henri Cherel, Yves |
author_facet |
Connan, Maëlle Mayzaud, Patrick Hobson, Keith A. Weimerskirch, Henri Cherel, Yves |
author_sort |
Connan, Maëlle |
title |
Food and feeding ecology of the Tasmanian short-tailed shearwater (Puffinus tenuirostris, Temminck): insights from three complementary methods |
title_short |
Food and feeding ecology of the Tasmanian short-tailed shearwater (Puffinus tenuirostris, Temminck): insights from three complementary methods |
title_full |
Food and feeding ecology of the Tasmanian short-tailed shearwater (Puffinus tenuirostris, Temminck): insights from three complementary methods |
title_fullStr |
Food and feeding ecology of the Tasmanian short-tailed shearwater (Puffinus tenuirostris, Temminck): insights from three complementary methods |
title_full_unstemmed |
Food and feeding ecology of the Tasmanian short-tailed shearwater (Puffinus tenuirostris, Temminck): insights from three complementary methods |
title_sort |
food and feeding ecology of the tasmanian short-tailed shearwater (puffinus tenuirostris, temminck): insights from three complementary methods |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00549016 |
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_source |
ISSN: 0916-8370 EISSN: 1573-868X Journal of Oceanography https://hal.science/hal-00549016 Journal of Oceanography, 2010, 3, pp.19-32 |
op_relation |
hal-00549016 https://hal.science/hal-00549016 |
_version_ |
1766276059999764480 |