Cephalopods in the diet of nonbreeding black-browed and grey-headed albatrosses from South Georgia
International audience The food and feeding ecology of albatrossesduring the nonbreeding season is still poorly known, particularlywith regard to the cephalopod component. Thiswas studied in black-browed Thalassarche melanophrisand grey-headed T. chrysostoma albatrosses by analysingboluses collected...
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Online Access: | https://hal.science/hal-01274103 https://doi.org/10.1007/s00300-014-1626-3 |
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ftunivrochelle:oai:HAL:hal-01274103v1 2024-02-11T09:58:50+01:00 Cephalopods in the diet of nonbreeding black-browed and grey-headed albatrosses from South Georgia Alvito, Pedro M. Rosa, Rui Phillips, Richard A. Cherel, Yves Ceia, Filipe Guerreiro, Miguel Seco, Jose Baeta, Alexandra Vieira, Rui P. Xavier, Jose C Marine and environmental research centre - IMAR-CMA (Coimbra, Portugal) University of Coimbra Portugal (UC) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) 2015-11-17 https://hal.science/hal-01274103 https://doi.org/10.1007/s00300-014-1626-3 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-014-1626-3 hal-01274103 https://hal.science/hal-01274103 doi:10.1007/s00300-014-1626-3 ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.science/hal-01274103 Polar Biology, 2015, 38, pp.631-641. ⟨10.1007/s00300-014-1626-3⟩ Antarctica Albatrosses Cephalopods Thalassarche melanophris Thalassarche chrysostoma [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftunivrochelle https://doi.org/10.1007/s00300-014-1626-3 2024-01-23T23:35:48Z International audience The food and feeding ecology of albatrossesduring the nonbreeding season is still poorly known, particularlywith regard to the cephalopod component. Thiswas studied in black-browed Thalassarche melanophrisand grey-headed T. chrysostoma albatrosses by analysingboluses collected shortly after adults returned to colonies atBird Island, South Georgia (54S, 38W), in 2009. Basedon stable isotopic analyses of the lower beaks, we determinedthe habitat and trophic level (from d13C and d15N,respectively) of the most important cephalopods andassessed the relative importance of scavenging in terms ofthe albatrosses’ feeding regimes. Based on lower rostrallengths (LRLs), the main cephalopod species in the diets ofboth albatrosses was Kondakovia longimana, by frequencyof occurrence (F[90 %), number (N[40 %) and mass(M[80 %). The large estimated mass of many squid,including K. longimana, suggests that a high proportion([80 % by mass) was scavenged, and that scavenging ismuch more important during the nonbreeding season thanwould be expected from breeding-season diets. Thediversity of cephalopods consumed by nonbreeding birds inour study was similar to that recorded during previousbreeding seasons, but included two new species [Moroteuthissp. B (Imber) and ?Mastigoteuthis A (Clarke)].Based on similarities in LRL, d13C and d15N, the squidconsumed may have been from the same oceanic populationsor region, with the exception of Taonius sp. B (Voss)and K. longimana, which, based on significant differencesin d15N values, suggest that they may have originated fromdifferent stocks, indicating differences in the albatrosses’feeding regimes. Article in Journal/Newspaper Antarc* Antarctica Polar Biology HAL - Université de La Rochelle Polar Biology 38 5 631 641 |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
Antarctica Albatrosses Cephalopods Thalassarche melanophris Thalassarche chrysostoma [SDE]Environmental Sciences |
spellingShingle |
Antarctica Albatrosses Cephalopods Thalassarche melanophris Thalassarche chrysostoma [SDE]Environmental Sciences Alvito, Pedro M. Rosa, Rui Phillips, Richard A. Cherel, Yves Ceia, Filipe Guerreiro, Miguel Seco, Jose Baeta, Alexandra Vieira, Rui P. Xavier, Jose C Cephalopods in the diet of nonbreeding black-browed and grey-headed albatrosses from South Georgia |
topic_facet |
Antarctica Albatrosses Cephalopods Thalassarche melanophris Thalassarche chrysostoma [SDE]Environmental Sciences |
description |
International audience The food and feeding ecology of albatrossesduring the nonbreeding season is still poorly known, particularlywith regard to the cephalopod component. Thiswas studied in black-browed Thalassarche melanophrisand grey-headed T. chrysostoma albatrosses by analysingboluses collected shortly after adults returned to colonies atBird Island, South Georgia (54S, 38W), in 2009. Basedon stable isotopic analyses of the lower beaks, we determinedthe habitat and trophic level (from d13C and d15N,respectively) of the most important cephalopods andassessed the relative importance of scavenging in terms ofthe albatrosses’ feeding regimes. Based on lower rostrallengths (LRLs), the main cephalopod species in the diets ofboth albatrosses was Kondakovia longimana, by frequencyof occurrence (F[90 %), number (N[40 %) and mass(M[80 %). The large estimated mass of many squid,including K. longimana, suggests that a high proportion([80 % by mass) was scavenged, and that scavenging ismuch more important during the nonbreeding season thanwould be expected from breeding-season diets. Thediversity of cephalopods consumed by nonbreeding birds inour study was similar to that recorded during previousbreeding seasons, but included two new species [Moroteuthissp. B (Imber) and ?Mastigoteuthis A (Clarke)].Based on similarities in LRL, d13C and d15N, the squidconsumed may have been from the same oceanic populationsor region, with the exception of Taonius sp. B (Voss)and K. longimana, which, based on significant differencesin d15N values, suggest that they may have originated fromdifferent stocks, indicating differences in the albatrosses’feeding regimes. |
author2 |
Marine and environmental research centre - IMAR-CMA (Coimbra, Portugal) University of Coimbra Portugal (UC) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Alvito, Pedro M. Rosa, Rui Phillips, Richard A. Cherel, Yves Ceia, Filipe Guerreiro, Miguel Seco, Jose Baeta, Alexandra Vieira, Rui P. Xavier, Jose C |
author_facet |
Alvito, Pedro M. Rosa, Rui Phillips, Richard A. Cherel, Yves Ceia, Filipe Guerreiro, Miguel Seco, Jose Baeta, Alexandra Vieira, Rui P. Xavier, Jose C |
author_sort |
Alvito, Pedro M. |
title |
Cephalopods in the diet of nonbreeding black-browed and grey-headed albatrosses from South Georgia |
title_short |
Cephalopods in the diet of nonbreeding black-browed and grey-headed albatrosses from South Georgia |
title_full |
Cephalopods in the diet of nonbreeding black-browed and grey-headed albatrosses from South Georgia |
title_fullStr |
Cephalopods in the diet of nonbreeding black-browed and grey-headed albatrosses from South Georgia |
title_full_unstemmed |
Cephalopods in the diet of nonbreeding black-browed and grey-headed albatrosses from South Georgia |
title_sort |
cephalopods in the diet of nonbreeding black-browed and grey-headed albatrosses from south georgia |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01274103 https://doi.org/10.1007/s00300-014-1626-3 |
genre |
Antarc* Antarctica Polar Biology |
genre_facet |
Antarc* Antarctica Polar Biology |
op_source |
ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.science/hal-01274103 Polar Biology, 2015, 38, pp.631-641. ⟨10.1007/s00300-014-1626-3⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-014-1626-3 hal-01274103 https://hal.science/hal-01274103 doi:10.1007/s00300-014-1626-3 |
op_doi |
https://doi.org/10.1007/s00300-014-1626-3 |
container_title |
Polar Biology |
container_volume |
38 |
container_issue |
5 |
container_start_page |
631 |
op_container_end_page |
641 |
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1790594606274969600 |