(Table 1) Reproductive performance of brown skua pairs with and without feeding territories at Potter Peninsula/King George Island from 1998/1999 to 2000/2001
In the maritime Antarctic, brown skuas (Catharacta antarctica lonnbergi) show two foraging strategies: some pairs occupy feeding territories in penguin colonies, while others can only feed in unoccupied areas of a penguin colony without defending a feeding territory. One-third of the studied breedin...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.848018 2024-09-15T17:43:20+00:00 (Table 1) Reproductive performance of brown skua pairs with and without feeding territories at Potter Peninsula/King George Island from 1998/1999 to 2000/2001 Hahn, Steffen Peter, Hans-Ulrich LATITUDE: -62.250000 * LONGITUDE: -58.670000 2003 text/tab-separated-values, 48 data points https://doi.pangaea.de/10.1594/PANGAEA.848018 https://doi.org/10.1594/PANGAEA.848018 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.848018 https://doi.org/10.1594/PANGAEA.848018 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Hahn, Steffen; Peter, Hans-Ulrich (2003): Feeding territoriality and the reproductive consequences in brown skuas Catharacta antarctica lonnbergi. Polar Biology, 26(8), 552-559, https://doi.org/10.1007/s00300-003-0522-z Biological sample BIOS Catharacta antarctica lonnbergi clutch size Eggs survived to hatching Group Number of fledglings per nest Potter_Pen Potter Peninsula King George Island Western Antarctica Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sample amount SPP1158 Standard deviation Time coverage dataset 2003 ftpangaea https://doi.org/10.1594/PANGAEA.84801810.1007/s00300-003-0522-z 2024-07-24T02:31:33Z In the maritime Antarctic, brown skuas (Catharacta antarctica lonnbergi) show two foraging strategies: some pairs occupy feeding territories in penguin colonies, while others can only feed in unoccupied areas of a penguin colony without defending a feeding territory. One-third of the studied breeding skua population in the South Shetlands occupied territories of varying size (48 to >3,000 penguin nests) and monopolised 93% of all penguin nests in sub-colonies. Skuas without feeding territories foraged in only 7% of penguin sub-colonies and in part of the main colony. Females owning feeding territories were larger in body size than females without feeding territories; no differences in size were found in males. Territory holders permanently controlled their resources but defence power diminished towards the end of the reproductive season. Territory ownership guaranteed sufficient food supply and led to a 5.5 days earlier egg-laying and chick-hatching. Short distances between nest and foraging site allowed territorial pairs a higher nest-attendance rate such that their chicks survived better (71%) than chicks from skua pairs without feeding territories (45%). Due to lower hatching success in territorial pairs, no difference in breeding success of pairs with and without feeding territories was found in 3 years. We conclude that skuas owning feeding territories in penguin colonies benefit from the predictable and stable food resource by an earlier termination of the annual breeding cycle and higher offspring survivorship. Dataset Antarc* Antarctic Antarctica Brown Skua King George Island Polar Biology Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-58.670000,-58.670000,-62.250000,-62.250000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Biological sample BIOS Catharacta antarctica lonnbergi clutch size Eggs survived to hatching Group Number of fledglings per nest Potter_Pen Potter Peninsula King George Island Western Antarctica Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sample amount SPP1158 Standard deviation Time coverage |
spellingShingle |
Biological sample BIOS Catharacta antarctica lonnbergi clutch size Eggs survived to hatching Group Number of fledglings per nest Potter_Pen Potter Peninsula King George Island Western Antarctica Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sample amount SPP1158 Standard deviation Time coverage Hahn, Steffen Peter, Hans-Ulrich (Table 1) Reproductive performance of brown skua pairs with and without feeding territories at Potter Peninsula/King George Island from 1998/1999 to 2000/2001 |
topic_facet |
Biological sample BIOS Catharacta antarctica lonnbergi clutch size Eggs survived to hatching Group Number of fledglings per nest Potter_Pen Potter Peninsula King George Island Western Antarctica Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sample amount SPP1158 Standard deviation Time coverage |
description |
In the maritime Antarctic, brown skuas (Catharacta antarctica lonnbergi) show two foraging strategies: some pairs occupy feeding territories in penguin colonies, while others can only feed in unoccupied areas of a penguin colony without defending a feeding territory. One-third of the studied breeding skua population in the South Shetlands occupied territories of varying size (48 to >3,000 penguin nests) and monopolised 93% of all penguin nests in sub-colonies. Skuas without feeding territories foraged in only 7% of penguin sub-colonies and in part of the main colony. Females owning feeding territories were larger in body size than females without feeding territories; no differences in size were found in males. Territory holders permanently controlled their resources but defence power diminished towards the end of the reproductive season. Territory ownership guaranteed sufficient food supply and led to a 5.5 days earlier egg-laying and chick-hatching. Short distances between nest and foraging site allowed territorial pairs a higher nest-attendance rate such that their chicks survived better (71%) than chicks from skua pairs without feeding territories (45%). Due to lower hatching success in territorial pairs, no difference in breeding success of pairs with and without feeding territories was found in 3 years. We conclude that skuas owning feeding territories in penguin colonies benefit from the predictable and stable food resource by an earlier termination of the annual breeding cycle and higher offspring survivorship. |
format |
Dataset |
author |
Hahn, Steffen Peter, Hans-Ulrich |
author_facet |
Hahn, Steffen Peter, Hans-Ulrich |
author_sort |
Hahn, Steffen |
title |
(Table 1) Reproductive performance of brown skua pairs with and without feeding territories at Potter Peninsula/King George Island from 1998/1999 to 2000/2001 |
title_short |
(Table 1) Reproductive performance of brown skua pairs with and without feeding territories at Potter Peninsula/King George Island from 1998/1999 to 2000/2001 |
title_full |
(Table 1) Reproductive performance of brown skua pairs with and without feeding territories at Potter Peninsula/King George Island from 1998/1999 to 2000/2001 |
title_fullStr |
(Table 1) Reproductive performance of brown skua pairs with and without feeding territories at Potter Peninsula/King George Island from 1998/1999 to 2000/2001 |
title_full_unstemmed |
(Table 1) Reproductive performance of brown skua pairs with and without feeding territories at Potter Peninsula/King George Island from 1998/1999 to 2000/2001 |
title_sort |
(table 1) reproductive performance of brown skua pairs with and without feeding territories at potter peninsula/king george island from 1998/1999 to 2000/2001 |
publisher |
PANGAEA |
publishDate |
2003 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.848018 https://doi.org/10.1594/PANGAEA.848018 |
op_coverage |
LATITUDE: -62.250000 * LONGITUDE: -58.670000 |
long_lat |
ENVELOPE(-58.670000,-58.670000,-62.250000,-62.250000) |
genre |
Antarc* Antarctic Antarctica Brown Skua King George Island Polar Biology Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Brown Skua King George Island Polar Biology Sea ice |
op_source |
Supplement to: Hahn, Steffen; Peter, Hans-Ulrich (2003): Feeding territoriality and the reproductive consequences in brown skuas Catharacta antarctica lonnbergi. Polar Biology, 26(8), 552-559, https://doi.org/10.1007/s00300-003-0522-z |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.848018 https://doi.org/10.1594/PANGAEA.848018 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.84801810.1007/s00300-003-0522-z |
_version_ |
1810490267593080832 |