Predation on cephalopods by Pygoscelis papua and Arctocephalus gazella at South Orkney Islands
ABSTRACT: The cephalopod diet of the gentoo penguin, Pygoscelis papua and the Ant− arctic fur seal, Arctocephalus gazella was comparatively analyzed at Laurie Island, South Orkney Islands. A total of 125 stomach samples were collected by the water off−loading method from gentoo penguins during the a...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.614.2816 2023-05-15T14:01:51+02:00 Predation on cephalopods by Pygoscelis papua and Arctocephalus gazella at South Orkney Islands Marcela M. Libertelli Gustavo A. Daneri Uwe Piatkowski Nestor R. Coria Ro R. Carlini The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.614.2816 http://www.polar.pan.pl/ppr25/ppr25-267.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.614.2816 http://www.polar.pan.pl/ppr25/ppr25-267.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.polar.pan.pl/ppr25/ppr25-267.pdf Key words Antarctica South Orkney Islands gentoo penguin fur seal cephalopods text ftciteseerx 2016-01-08T14:39:56Z ABSTRACT: The cephalopod diet of the gentoo penguin, Pygoscelis papua and the Ant− arctic fur seal, Arctocephalus gazella was comparatively analyzed at Laurie Island, South Orkney Islands. A total of 125 stomach samples were collected by the water off−loading method from gentoo penguins during the autumns of 1993, 1995 and 1996, and 39 fur seal scats were collected from mid March to April 1988. Cephalopods preyed upon by gentoo penguins were represented by 1974 beaks (1628 lower, 346 upper) which occurred in 50.4% of the samples. Lower beaks identified belonged exclusively to the squid Psychroteuthis glacialis. The mean lower rostral length (LRL) of these beaks was 1.1 mm (range 0.4– 1.8 mm). From the Antarctic fur seal scats 103 beaks (41 lower, 62 upper) were removed from 60.6 % of scats which contained prey remains. The cephalopod species identified were Slosarczykovia circumantarctica and P. glacialis which constituted 78.8 % and 21.1 % in terms of numbers, respectively. The mean lower rostral length for S. circumantarctica was 2.7 mm (range 2.0–3.5 mm), while that of P. glacialis was 1.6 mm (range 1.0–2.5 mm). The foraging behaviour of the two top predators was analyzed and discussed according to the composition and size of their cephalopod prey. Text Antarc* Antarctic Antarctic Fur Seal Antarctica Arctic Arctocephalus gazella Gentoo penguin Laurie Island Pygoscelis papua South Orkney Islands Unknown Antarctic Arctic Laurie ENVELOPE(-44.616,-44.616,-60.733,-60.733) Laurie Island ENVELOPE(-103.568,-103.568,59.134,59.134) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) The Antarctic |
institution |
Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
topic |
Key words Antarctica South Orkney Islands gentoo penguin fur seal cephalopods |
spellingShingle |
Key words Antarctica South Orkney Islands gentoo penguin fur seal cephalopods Marcela M. Libertelli Gustavo A. Daneri Uwe Piatkowski Nestor R. Coria Ro R. Carlini Predation on cephalopods by Pygoscelis papua and Arctocephalus gazella at South Orkney Islands |
topic_facet |
Key words Antarctica South Orkney Islands gentoo penguin fur seal cephalopods |
description |
ABSTRACT: The cephalopod diet of the gentoo penguin, Pygoscelis papua and the Ant− arctic fur seal, Arctocephalus gazella was comparatively analyzed at Laurie Island, South Orkney Islands. A total of 125 stomach samples were collected by the water off−loading method from gentoo penguins during the autumns of 1993, 1995 and 1996, and 39 fur seal scats were collected from mid March to April 1988. Cephalopods preyed upon by gentoo penguins were represented by 1974 beaks (1628 lower, 346 upper) which occurred in 50.4% of the samples. Lower beaks identified belonged exclusively to the squid Psychroteuthis glacialis. The mean lower rostral length (LRL) of these beaks was 1.1 mm (range 0.4– 1.8 mm). From the Antarctic fur seal scats 103 beaks (41 lower, 62 upper) were removed from 60.6 % of scats which contained prey remains. The cephalopod species identified were Slosarczykovia circumantarctica and P. glacialis which constituted 78.8 % and 21.1 % in terms of numbers, respectively. The mean lower rostral length for S. circumantarctica was 2.7 mm (range 2.0–3.5 mm), while that of P. glacialis was 1.6 mm (range 1.0–2.5 mm). The foraging behaviour of the two top predators was analyzed and discussed according to the composition and size of their cephalopod prey. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Marcela M. Libertelli Gustavo A. Daneri Uwe Piatkowski Nestor R. Coria Ro R. Carlini |
author_facet |
Marcela M. Libertelli Gustavo A. Daneri Uwe Piatkowski Nestor R. Coria Ro R. Carlini |
author_sort |
Marcela M. Libertelli |
title |
Predation on cephalopods by Pygoscelis papua and Arctocephalus gazella at South Orkney Islands |
title_short |
Predation on cephalopods by Pygoscelis papua and Arctocephalus gazella at South Orkney Islands |
title_full |
Predation on cephalopods by Pygoscelis papua and Arctocephalus gazella at South Orkney Islands |
title_fullStr |
Predation on cephalopods by Pygoscelis papua and Arctocephalus gazella at South Orkney Islands |
title_full_unstemmed |
Predation on cephalopods by Pygoscelis papua and Arctocephalus gazella at South Orkney Islands |
title_sort |
predation on cephalopods by pygoscelis papua and arctocephalus gazella at south orkney islands |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.614.2816 http://www.polar.pan.pl/ppr25/ppr25-267.pdf |
long_lat |
ENVELOPE(-44.616,-44.616,-60.733,-60.733) ENVELOPE(-103.568,-103.568,59.134,59.134) ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Arctic Laurie Laurie Island South Orkney Islands The Antarctic |
geographic_facet |
Antarctic Arctic Laurie Laurie Island South Orkney Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Antarctica Arctic Arctocephalus gazella Gentoo penguin Laurie Island Pygoscelis papua South Orkney Islands |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Antarctica Arctic Arctocephalus gazella Gentoo penguin Laurie Island Pygoscelis papua South Orkney Islands |
op_source |
http://www.polar.pan.pl/ppr25/ppr25-267.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.614.2816 http://www.polar.pan.pl/ppr25/ppr25-267.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766271909531484160 |