Monitoring of a Southern Giant Petrel Macronectes giganteus population on the Frazier Islands, Wilkes Land, Antarctica
Abstract Since 1956, Southern Giant Petrels on the Frazier Islands, East Antarctica, have been counted with different census techniques, sometimes varying within seasons and among islands, which hindered analysis of the data. Protective measures for the islands from 1986 onwards have increased the n...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1045.3453 2023-05-15T13:55:16+02:00 Monitoring of a Southern Giant Petrel Macronectes giganteus population on the Frazier Islands, Wilkes Land, Antarctica Jeroen C S Creuwels Ae Jonathan S Stark Eric J Woehler Ae Jan A Van Franeker Christine A Ribic The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1045.3453 http://www.creuwels.nl/old/Download/Creuwels_PolarBiol2005.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1045.3453 http://www.creuwels.nl/old/Download/Creuwels_PolarBiol2005.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.creuwels.nl/old/Download/Creuwels_PolarBiol2005.pdf text ftciteseerx 2020-04-05T00:17:33Z Abstract Since 1956, Southern Giant Petrels on the Frazier Islands, East Antarctica, have been counted with different census techniques, sometimes varying within seasons and among islands, which hindered analysis of the data. Protective measures for the islands from 1986 onwards have increased the need for reliable long-term census data, but reduced the ways to collect these data. Published and unpublished data were re-examined, and population trends were reconstructed based on two relatively standardised techniques: the number of active chicks (AC) and the number of apparently occupied nests (AON) around hatching. AC-values from Nelly Island from 1959 to 1998 indicate substantial periodic fluctuations, but no consistent long-term change. Since the late 1970s, AC-values on the other two islands and AON-values suggest that the breeding population may have grown by 35%. This recent growth, however, is within the extent of periodic fluctuations observed in Southern Giant Petrel population that is stable over the long term. Text Antarc* Antarctica East Antarctica Frazier Islands Giant Petrel Giant Petrels Macronectes giganteus Nelly Island Wilkes Land Unknown East Antarctica Frazier ENVELOPE(-154.967,-154.967,-77.867,-77.867) Frazier Islands ENVELOPE(110.166,110.166,-66.227,-66.227) Giganteus ENVELOPE(62.500,62.500,-67.567,-67.567) Nelly Island ENVELOPE(110.183,110.183,-66.217,-66.217) Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) |
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English |
description |
Abstract Since 1956, Southern Giant Petrels on the Frazier Islands, East Antarctica, have been counted with different census techniques, sometimes varying within seasons and among islands, which hindered analysis of the data. Protective measures for the islands from 1986 onwards have increased the need for reliable long-term census data, but reduced the ways to collect these data. Published and unpublished data were re-examined, and population trends were reconstructed based on two relatively standardised techniques: the number of active chicks (AC) and the number of apparently occupied nests (AON) around hatching. AC-values from Nelly Island from 1959 to 1998 indicate substantial periodic fluctuations, but no consistent long-term change. Since the late 1970s, AC-values on the other two islands and AON-values suggest that the breeding population may have grown by 35%. This recent growth, however, is within the extent of periodic fluctuations observed in Southern Giant Petrel population that is stable over the long term. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jeroen C S Creuwels Ae Jonathan S Stark Eric J Woehler Ae Jan A Van Franeker Christine A Ribic |
spellingShingle |
Jeroen C S Creuwels Ae Jonathan S Stark Eric J Woehler Ae Jan A Van Franeker Christine A Ribic Monitoring of a Southern Giant Petrel Macronectes giganteus population on the Frazier Islands, Wilkes Land, Antarctica |
author_facet |
Jeroen C S Creuwels Ae Jonathan S Stark Eric J Woehler Ae Jan A Van Franeker Christine A Ribic |
author_sort |
Jeroen C S Creuwels Ae |
title |
Monitoring of a Southern Giant Petrel Macronectes giganteus population on the Frazier Islands, Wilkes Land, Antarctica |
title_short |
Monitoring of a Southern Giant Petrel Macronectes giganteus population on the Frazier Islands, Wilkes Land, Antarctica |
title_full |
Monitoring of a Southern Giant Petrel Macronectes giganteus population on the Frazier Islands, Wilkes Land, Antarctica |
title_fullStr |
Monitoring of a Southern Giant Petrel Macronectes giganteus population on the Frazier Islands, Wilkes Land, Antarctica |
title_full_unstemmed |
Monitoring of a Southern Giant Petrel Macronectes giganteus population on the Frazier Islands, Wilkes Land, Antarctica |
title_sort |
monitoring of a southern giant petrel macronectes giganteus population on the frazier islands, wilkes land, antarctica |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1045.3453 http://www.creuwels.nl/old/Download/Creuwels_PolarBiol2005.pdf |
long_lat |
ENVELOPE(-154.967,-154.967,-77.867,-77.867) ENVELOPE(110.166,110.166,-66.227,-66.227) ENVELOPE(62.500,62.500,-67.567,-67.567) ENVELOPE(110.183,110.183,-66.217,-66.217) ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
East Antarctica Frazier Frazier Islands Giganteus Nelly Island Wilkes Land |
geographic_facet |
East Antarctica Frazier Frazier Islands Giganteus Nelly Island Wilkes Land |
genre |
Antarc* Antarctica East Antarctica Frazier Islands Giant Petrel Giant Petrels Macronectes giganteus Nelly Island Wilkes Land |
genre_facet |
Antarc* Antarctica East Antarctica Frazier Islands Giant Petrel Giant Petrels Macronectes giganteus Nelly Island Wilkes Land |
op_source |
http://www.creuwels.nl/old/Download/Creuwels_PolarBiol2005.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1045.3453 http://www.creuwels.nl/old/Download/Creuwels_PolarBiol2005.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766261636551671808 |