The diet of the blue-eyed shag, Phalacrocorax atriceps bransfieldensis feeding in the Bransfield Strait
The diet of the Antarctic blue-eyed shag Phalacrocorax atriceps bransfieldensis was analysed based on the identification of the prey items in 50 regurgitated casts collected at Duthoit Point, Nelson Island, in February 1991. Fish remains occurred in 100% of the casts and represented 68% by number an...
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Cambridge University Press (CUP)
1993
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Online Access: | http://dx.doi.org/10.1017/s0954102093000458 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102093000458 |
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crcambridgeupr:10.1017/s0954102093000458 2024-04-28T08:00:28+00:00 The diet of the blue-eyed shag, Phalacrocorax atriceps bransfieldensis feeding in the Bransfield Strait Casaux, Ricardo J. Barrera-Oro, Esteban R. 1993 http://dx.doi.org/10.1017/s0954102093000458 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102093000458 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 5, issue 4, page 335-338 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1993 crcambridgeupr https://doi.org/10.1017/s0954102093000458 2024-04-02T06:55:08Z The diet of the Antarctic blue-eyed shag Phalacrocorax atriceps bransfieldensis was analysed based on the identification of the prey items in 50 regurgitated casts collected at Duthoit Point, Nelson Island, in February 1991. Fish remains occurred in 100% of the casts and represented 68% by number and 90% by weight of the total prey items. From a total of 2112 otoliths found, 1176 fish specimens were identified belonging to four demersalbenthic species: Harpagifer antarcticus, Notothenia neglecta, Nototheniops nudifrons and Trematomus newnesi . Equations to estimate total length and weight from otolith length are provided. H. antarcticus and N. neglecta were the most frequent (92%) and important by weight (66%) respectively. Cephalopod beaks found indicate benthic octopods as the second group in importance after fish. Other invertebrates such as polychaetes, gastropods, bivalves and crustaceans were only occasional. The presence of algae and stones in the casts is attributed to accidental ingestion. Our results are in general agreement with those published for other Antarctic localities which indicate that P. atriceps is a benthic coastal feeder, with fish as its main food. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science antarcticus Blue Eyed Shag Bransfield Strait Nelson Island Phalacrocorax atriceps Cambridge University Press Antarctic Science 5 4 335 338 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
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English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Casaux, Ricardo J. Barrera-Oro, Esteban R. The diet of the blue-eyed shag, Phalacrocorax atriceps bransfieldensis feeding in the Bransfield Strait |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
The diet of the Antarctic blue-eyed shag Phalacrocorax atriceps bransfieldensis was analysed based on the identification of the prey items in 50 regurgitated casts collected at Duthoit Point, Nelson Island, in February 1991. Fish remains occurred in 100% of the casts and represented 68% by number and 90% by weight of the total prey items. From a total of 2112 otoliths found, 1176 fish specimens were identified belonging to four demersalbenthic species: Harpagifer antarcticus, Notothenia neglecta, Nototheniops nudifrons and Trematomus newnesi . Equations to estimate total length and weight from otolith length are provided. H. antarcticus and N. neglecta were the most frequent (92%) and important by weight (66%) respectively. Cephalopod beaks found indicate benthic octopods as the second group in importance after fish. Other invertebrates such as polychaetes, gastropods, bivalves and crustaceans were only occasional. The presence of algae and stones in the casts is attributed to accidental ingestion. Our results are in general agreement with those published for other Antarctic localities which indicate that P. atriceps is a benthic coastal feeder, with fish as its main food. |
format |
Article in Journal/Newspaper |
author |
Casaux, Ricardo J. Barrera-Oro, Esteban R. |
author_facet |
Casaux, Ricardo J. Barrera-Oro, Esteban R. |
author_sort |
Casaux, Ricardo J. |
title |
The diet of the blue-eyed shag, Phalacrocorax atriceps bransfieldensis feeding in the Bransfield Strait |
title_short |
The diet of the blue-eyed shag, Phalacrocorax atriceps bransfieldensis feeding in the Bransfield Strait |
title_full |
The diet of the blue-eyed shag, Phalacrocorax atriceps bransfieldensis feeding in the Bransfield Strait |
title_fullStr |
The diet of the blue-eyed shag, Phalacrocorax atriceps bransfieldensis feeding in the Bransfield Strait |
title_full_unstemmed |
The diet of the blue-eyed shag, Phalacrocorax atriceps bransfieldensis feeding in the Bransfield Strait |
title_sort |
diet of the blue-eyed shag, phalacrocorax atriceps bransfieldensis feeding in the bransfield strait |
publisher |
Cambridge University Press (CUP) |
publishDate |
1993 |
url |
http://dx.doi.org/10.1017/s0954102093000458 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102093000458 |
genre |
Antarc* Antarctic Antarctic Science antarcticus Blue Eyed Shag Bransfield Strait Nelson Island Phalacrocorax atriceps |
genre_facet |
Antarc* Antarctic Antarctic Science antarcticus Blue Eyed Shag Bransfield Strait Nelson Island Phalacrocorax atriceps |
op_source |
Antarctic Science volume 5, issue 4, page 335-338 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102093000458 |
container_title |
Antarctic Science |
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5 |
container_issue |
4 |
container_start_page |
335 |
op_container_end_page |
338 |
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1797572681223110656 |