Fish in the diet of the Antarctic shag at four colonies on the Danco Coast, Antarctic Peninsula
The diet of breeding Antarctic shags ( Phalacrocorax bransfieldensis ) was investigated at four colonies on the Danco Coast, Antarctic Peninsula, by the analysis of 616 pellets (regurgitated casts) collected from December 1997 to February 1998. Overall, demersal-benthic fish were the most frequent a...
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crcambridgeupr:10.1017/s095410200200055x 2024-03-03T08:39:18+00:00 Fish in the diet of the Antarctic shag at four colonies on the Danco Coast, Antarctic Peninsula Casaux, R. Baroni, A. Barrera-Oro, E. 2002 http://dx.doi.org/10.1017/s095410200200055x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410200200055X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 14, issue 1, page 32-36 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2002 crcambridgeupr https://doi.org/10.1017/s095410200200055x 2024-02-08T08:47:17Z The diet of breeding Antarctic shags ( Phalacrocorax bransfieldensis ) was investigated at four colonies on the Danco Coast, Antarctic Peninsula, by the analysis of 616 pellets (regurgitated casts) collected from December 1997 to February 1998. Overall, demersal-benthic fish were the most frequent and important prey at all the colonies, followed by octopods and gastropods. Amongst fish, Notothenia coriiceps was the main prey in all of the sampling sites, followed in similar importance by Gobionotothen gibberifrons at Cape Herschel, Primavera Island and Midas Island and in less importance by Harpagifer antarcticus at Py Point. There were marked differences among colonies in the size of the fish consumed. The largest and the smallest specimens were eaten by shags from Midas Island and Py Point respectively. This was mainly influenced by the number of specimens of the smallest fish species, H. antarcticus , consumed at Py Point. The differences in the diet composition may be related to the different foraging areas used by the shags. Results from this study differ from previous studies around the Antarctic Peninsula. The shags at the Danco Coast preyed markedly more intensively than those at the South Shetland Islands on G. gibberifrons . This finding reflects the low abundance of this fish species in inshore waters (< 100 m depth) at the South Shetland Islands and supports the use of the Antarctic shags to monitor trends in local populations of coastal fish species. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science antarcticus Midas Island South Shetland Islands Cambridge University Press Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Danco ENVELOPE(-61.033,-61.033,-64.717,-64.717) Danco Coast ENVELOPE(-62.000,-62.000,-64.700,-64.700) Py Point ENVELOPE(-63.597,-63.597,-64.879,-64.879) Midas Island ENVELOPE(-61.101,-61.101,-64.169,-64.169) Cape Herschel ENVELOPE(-61.033,-61.033,-64.067,-64.067) Antarctic Science 14 1 32 36 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Casaux, R. Baroni, A. Barrera-Oro, E. Fish in the diet of the Antarctic shag at four colonies on the Danco Coast, Antarctic Peninsula |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
The diet of breeding Antarctic shags ( Phalacrocorax bransfieldensis ) was investigated at four colonies on the Danco Coast, Antarctic Peninsula, by the analysis of 616 pellets (regurgitated casts) collected from December 1997 to February 1998. Overall, demersal-benthic fish were the most frequent and important prey at all the colonies, followed by octopods and gastropods. Amongst fish, Notothenia coriiceps was the main prey in all of the sampling sites, followed in similar importance by Gobionotothen gibberifrons at Cape Herschel, Primavera Island and Midas Island and in less importance by Harpagifer antarcticus at Py Point. There were marked differences among colonies in the size of the fish consumed. The largest and the smallest specimens were eaten by shags from Midas Island and Py Point respectively. This was mainly influenced by the number of specimens of the smallest fish species, H. antarcticus , consumed at Py Point. The differences in the diet composition may be related to the different foraging areas used by the shags. Results from this study differ from previous studies around the Antarctic Peninsula. The shags at the Danco Coast preyed markedly more intensively than those at the South Shetland Islands on G. gibberifrons . This finding reflects the low abundance of this fish species in inshore waters (< 100 m depth) at the South Shetland Islands and supports the use of the Antarctic shags to monitor trends in local populations of coastal fish species. |
format |
Article in Journal/Newspaper |
author |
Casaux, R. Baroni, A. Barrera-Oro, E. |
author_facet |
Casaux, R. Baroni, A. Barrera-Oro, E. |
author_sort |
Casaux, R. |
title |
Fish in the diet of the Antarctic shag at four colonies on the Danco Coast, Antarctic Peninsula |
title_short |
Fish in the diet of the Antarctic shag at four colonies on the Danco Coast, Antarctic Peninsula |
title_full |
Fish in the diet of the Antarctic shag at four colonies on the Danco Coast, Antarctic Peninsula |
title_fullStr |
Fish in the diet of the Antarctic shag at four colonies on the Danco Coast, Antarctic Peninsula |
title_full_unstemmed |
Fish in the diet of the Antarctic shag at four colonies on the Danco Coast, Antarctic Peninsula |
title_sort |
fish in the diet of the antarctic shag at four colonies on the danco coast, antarctic peninsula |
publisher |
Cambridge University Press (CUP) |
publishDate |
2002 |
url |
http://dx.doi.org/10.1017/s095410200200055x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410200200055X |
long_lat |
ENVELOPE(-61.033,-61.033,-64.717,-64.717) ENVELOPE(-62.000,-62.000,-64.700,-64.700) ENVELOPE(-63.597,-63.597,-64.879,-64.879) ENVELOPE(-61.101,-61.101,-64.169,-64.169) ENVELOPE(-61.033,-61.033,-64.067,-64.067) |
geographic |
Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Danco Danco Coast Py Point Midas Island Cape Herschel |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Danco Danco Coast Py Point Midas Island Cape Herschel |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science antarcticus Midas Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science antarcticus Midas Island South Shetland Islands |
op_source |
Antarctic Science volume 14, issue 1, page 32-36 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s095410200200055x |
container_title |
Antarctic Science |
container_volume |
14 |
container_issue |
1 |
container_start_page |
32 |
op_container_end_page |
36 |
_version_ |
1792494777230426112 |