Carcasses of Adelie penguins as a food source for south polar skuas: some preliminary observations

Ian Norman, Ro MCFARLANE, Simon Ward

Research output: Contribution to journalArticle

Abstract

South Polar Skuas (Catharacta maccormicki) take eggs and young of Adelie bPenguins (Pygoscelis adeliae) by scavenging and predation. We collected carcasses of penguins near Davis, East Antarctica, and examined them for damage and tissue removal by skuas. Progression of tissue destruction and removal was used to indicate successive areas of feeding. Organs and tissues from undamaged, fresh corpses were weighed to determine potential food quantities. Areas of initial attack were around the head. Subsequent damage
was concentrated in the thoracic-abdominal regions, and around pelvic limb musculature. Such areas provided 19% (abdominal) and 12% (pelvic muscles) of the body mass. Because seabird eggs and chicks provide as much, if not more, energy as alternative foods (krill, fish) which require extended foraging, it is adaptive for skuas nesting near penguin colonies to forage there.
Original languageEnglish
Pages (from-to)26-34
Number of pages8
JournalWilson's Bulletin
Volume106
Issue number1
Publication statusPublished - 1994
Externally publishedYes

Fingerprint

penguins
krill
chest
Middle East
limbs (animal)
seabirds
Antarctica
chicks
foraging
forage
predation
muscles
energy
fish
Pygoscelis adeliae
tissues
Stercorariidae

Cite this

@article{307f623219ca453d9ff8a5579cc02692,
title = "Carcasses of Adelie penguins as a food source for south polar skuas: some preliminary observations",
abstract = "South Polar Skuas (Catharacta maccormicki) take eggs and young of Adelie bPenguins (Pygoscelis adeliae) by scavenging and predation. We collected carcasses of penguins near Davis, East Antarctica, and examined them for damage and tissue removal by skuas. Progression of tissue destruction and removal was used to indicate successive areas of feeding. Organs and tissues from undamaged, fresh corpses were weighed to determine potential food quantities. Areas of initial attack were around the head. Subsequent damage was concentrated in the thoracic-abdominal regions, and around pelvic limb musculature. Such areas provided 19{\%} (abdominal) and 12{\%} (pelvic muscles) of the body mass. Because seabird eggs and chicks provide as much, if not more, energy as alternative foods (krill, fish) which require extended foraging, it is adaptive for skuas nesting near penguin colonies to forage there.",
author = "Ian Norman and Ro MCFARLANE and Simon Ward",
year = "1994",
language = "English",
volume = "106",
pages = "26--34",
journal = "Wilson's Bulletin",
number = "1",

}

Carcasses of Adelie penguins as a food source for south polar skuas: some preliminary observations. / Norman, Ian; MCFARLANE, Ro; Ward, Simon.

In: Wilson's Bulletin, Vol. 106, No. 1, 1994, p. 26-34.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Carcasses of Adelie penguins as a food source for south polar skuas: some preliminary observations

AU - Norman, Ian

AU - MCFARLANE, Ro

AU - Ward, Simon

PY - 1994

Y1 - 1994

N2 - South Polar Skuas (Catharacta maccormicki) take eggs and young of Adelie bPenguins (Pygoscelis adeliae) by scavenging and predation. We collected carcasses of penguins near Davis, East Antarctica, and examined them for damage and tissue removal by skuas. Progression of tissue destruction and removal was used to indicate successive areas of feeding. Organs and tissues from undamaged, fresh corpses were weighed to determine potential food quantities. Areas of initial attack were around the head. Subsequent damage was concentrated in the thoracic-abdominal regions, and around pelvic limb musculature. Such areas provided 19% (abdominal) and 12% (pelvic muscles) of the body mass. Because seabird eggs and chicks provide as much, if not more, energy as alternative foods (krill, fish) which require extended foraging, it is adaptive for skuas nesting near penguin colonies to forage there.

AB - South Polar Skuas (Catharacta maccormicki) take eggs and young of Adelie bPenguins (Pygoscelis adeliae) by scavenging and predation. We collected carcasses of penguins near Davis, East Antarctica, and examined them for damage and tissue removal by skuas. Progression of tissue destruction and removal was used to indicate successive areas of feeding. Organs and tissues from undamaged, fresh corpses were weighed to determine potential food quantities. Areas of initial attack were around the head. Subsequent damage was concentrated in the thoracic-abdominal regions, and around pelvic limb musculature. Such areas provided 19% (abdominal) and 12% (pelvic muscles) of the body mass. Because seabird eggs and chicks provide as much, if not more, energy as alternative foods (krill, fish) which require extended foraging, it is adaptive for skuas nesting near penguin colonies to forage there.

M3 - Article

VL - 106

SP - 26

EP - 34

JO - Wilson's Bulletin

JF - Wilson's Bulletin

IS - 1

ER -