Isotopic niches of sympatric Gentoo and Chinstrap Penguins: evidence of competition for Antarctic krill?
As climate change, among other factors, is increasingly affecting Antarctic marine systems, competition for prey may increase between predators, particularly in the Antarctic Peninsula which has warmed more than elsewhere. Under such a context, we tested the feeding and trophic ecology of Gentoo (Py...
Published in: | Polar Biology |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Springer
2018
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/519701/ https://doi.org/10.1007/s00300-018-2306-5 |
id |
ftnerc:oai:nora.nerc.ac.uk:519701 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:519701 2023-05-15T13:49:34+02:00 Isotopic niches of sympatric Gentoo and Chinstrap Penguins: evidence of competition for Antarctic krill? Dimitrijević, Danijela Paiva, Vitor H. Ramos, Jaime A. Seco, José Ceia, Filipe R. Chipev, Nesho Valente, Tiago Barbosa, Andrés Xavier, Jose C. 2018-09 http://nora.nerc.ac.uk/id/eprint/519701/ https://doi.org/10.1007/s00300-018-2306-5 unknown Springer Dimitrijević, Danijela; Paiva, Vitor H.; Ramos, Jaime A.; Seco, José; Ceia, Filipe R.; Chipev, Nesho; Valente, Tiago; Barbosa, Andrés; Xavier, Jose C. orcid:0000-0002-9621-6660 . 2018 Isotopic niches of sympatric Gentoo and Chinstrap Penguins: evidence of competition for Antarctic krill? Polar Biology, 41 (9). 1655-1669. https://doi.org/10.1007/s00300-018-2306-5 <https://doi.org/10.1007/s00300-018-2306-5> Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1007/s00300-018-2306-5 2023-02-04T19:46:21Z As climate change, among other factors, is increasingly affecting Antarctic marine systems, competition for prey may increase between predators, particularly in the Antarctic Peninsula which has warmed more than elsewhere. Under such a context, we tested the feeding and trophic ecology of Gentoo (Pygoscelis papua) and Chinstrap (Pygoscelis antarctica) penguins breeding in sympatry at Livingston Island (Antarctic Peninsula) in a single season. We compared the diets of adults (from faecal samples, and stable isotopes in feathers and blood) and chicks (from stomach contents, and stable isotopes in down feathers, toenails and muscles of chicks that had died of unknown causes). Antarctic krill Euphausia superba dominated the diet of both species, although Gentoo Penguins fed on larger Antarctic krill than did Chinstrap Penguins. Stable isotope analyses of adult tissues revealed that both species fed at different niches in successive years, as depicted by the different levels δ13C in feathers (showing values from the previous breeding season) and whole blood (showing values from the current season). Tissues collected from chicks confirmed their diet over different time scales (i.e. days to weeks): Gentoo Penguins fed at a higher trophic level (possibly due to a more varied diet) and in different habitats than Chinstrap Penguins, providing evidence of isotopic niche separation of penguins. Our results may be relevant to the monitoring programmes of the Convention on the Conservation of Antarctic Marine Living Resources (CCAMLR) and suggest that adult scats, and stomach contents and tissues of recently died chicks, can be used in such programmes. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctica Euphausia superba Livingston Island Polar Biology Pygoscelis antarctica Pygoscelis papua Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Polar Biology 41 9 1655 1669 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
As climate change, among other factors, is increasingly affecting Antarctic marine systems, competition for prey may increase between predators, particularly in the Antarctic Peninsula which has warmed more than elsewhere. Under such a context, we tested the feeding and trophic ecology of Gentoo (Pygoscelis papua) and Chinstrap (Pygoscelis antarctica) penguins breeding in sympatry at Livingston Island (Antarctic Peninsula) in a single season. We compared the diets of adults (from faecal samples, and stable isotopes in feathers and blood) and chicks (from stomach contents, and stable isotopes in down feathers, toenails and muscles of chicks that had died of unknown causes). Antarctic krill Euphausia superba dominated the diet of both species, although Gentoo Penguins fed on larger Antarctic krill than did Chinstrap Penguins. Stable isotope analyses of adult tissues revealed that both species fed at different niches in successive years, as depicted by the different levels δ13C in feathers (showing values from the previous breeding season) and whole blood (showing values from the current season). Tissues collected from chicks confirmed their diet over different time scales (i.e. days to weeks): Gentoo Penguins fed at a higher trophic level (possibly due to a more varied diet) and in different habitats than Chinstrap Penguins, providing evidence of isotopic niche separation of penguins. Our results may be relevant to the monitoring programmes of the Convention on the Conservation of Antarctic Marine Living Resources (CCAMLR) and suggest that adult scats, and stomach contents and tissues of recently died chicks, can be used in such programmes. |
format |
Article in Journal/Newspaper |
author |
Dimitrijević, Danijela Paiva, Vitor H. Ramos, Jaime A. Seco, José Ceia, Filipe R. Chipev, Nesho Valente, Tiago Barbosa, Andrés Xavier, Jose C. |
spellingShingle |
Dimitrijević, Danijela Paiva, Vitor H. Ramos, Jaime A. Seco, José Ceia, Filipe R. Chipev, Nesho Valente, Tiago Barbosa, Andrés Xavier, Jose C. Isotopic niches of sympatric Gentoo and Chinstrap Penguins: evidence of competition for Antarctic krill? |
author_facet |
Dimitrijević, Danijela Paiva, Vitor H. Ramos, Jaime A. Seco, José Ceia, Filipe R. Chipev, Nesho Valente, Tiago Barbosa, Andrés Xavier, Jose C. |
author_sort |
Dimitrijević, Danijela |
title |
Isotopic niches of sympatric Gentoo and Chinstrap Penguins: evidence of competition for Antarctic krill? |
title_short |
Isotopic niches of sympatric Gentoo and Chinstrap Penguins: evidence of competition for Antarctic krill? |
title_full |
Isotopic niches of sympatric Gentoo and Chinstrap Penguins: evidence of competition for Antarctic krill? |
title_fullStr |
Isotopic niches of sympatric Gentoo and Chinstrap Penguins: evidence of competition for Antarctic krill? |
title_full_unstemmed |
Isotopic niches of sympatric Gentoo and Chinstrap Penguins: evidence of competition for Antarctic krill? |
title_sort |
isotopic niches of sympatric gentoo and chinstrap penguins: evidence of competition for antarctic krill? |
publisher |
Springer |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/519701/ https://doi.org/10.1007/s00300-018-2306-5 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Livingston Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Livingston Island |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctica Euphausia superba Livingston Island Polar Biology Pygoscelis antarctica Pygoscelis papua |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctica Euphausia superba Livingston Island Polar Biology Pygoscelis antarctica Pygoscelis papua |
op_relation |
Dimitrijević, Danijela; Paiva, Vitor H.; Ramos, Jaime A.; Seco, José; Ceia, Filipe R.; Chipev, Nesho; Valente, Tiago; Barbosa, Andrés; Xavier, Jose C. orcid:0000-0002-9621-6660 . 2018 Isotopic niches of sympatric Gentoo and Chinstrap Penguins: evidence of competition for Antarctic krill? Polar Biology, 41 (9). 1655-1669. https://doi.org/10.1007/s00300-018-2306-5 <https://doi.org/10.1007/s00300-018-2306-5> |
op_doi |
https://doi.org/10.1007/s00300-018-2306-5 |
container_title |
Polar Biology |
container_volume |
41 |
container_issue |
9 |
container_start_page |
1655 |
op_container_end_page |
1669 |
_version_ |
1766251755685806080 |