ECOLOGY AND BEHAVIOUR OF THE LITTLE AUK ALLE ALLE IN WEST GREENLAND
Summary A study of the breeding biology, feeding ecology, and behaviour of the Little Auk was carried out on Horse Head Island (73° 38′ N, 57° 08′ W) in west Greenland between July and August 1974. Distinct subcolony groups were recognized within the colony. During incubation, attendance at the colo...
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Online Access: | http://dx.doi.org/10.1111/j.1474-919x.1981.tb00168.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1981.tb00168.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1981.tb00168.x |
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crwiley:10.1111/j.1474-919x.1981.tb00168.x 2024-06-02T07:54:50+00:00 ECOLOGY AND BEHAVIOUR OF THE LITTLE AUK ALLE ALLE IN WEST GREENLAND Evans, P. G. H. 1981 http://dx.doi.org/10.1111/j.1474-919x.1981.tb00168.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1981.tb00168.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1981.tb00168.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 123, issue 1, page 1-18 ISSN 0019-1019 1474-919X journal-article 1981 crwiley https://doi.org/10.1111/j.1474-919x.1981.tb00168.x 2024-05-03T11:15:43Z Summary A study of the breeding biology, feeding ecology, and behaviour of the Little Auk was carried out on Horse Head Island (73° 38′ N, 57° 08′ W) in west Greenland between July and August 1974. Distinct subcolony groups were recognized within the colony. During incubation, attendance at the colony increased to a peak between 2100 and 2400 h, with large rafts building up on the sea before engaging in aerial flights and then settling on land. During the nestling period, this pattern changed with further peaks at 0600 and 1800 h, and a decline during the afternoon, particularly during the late nestling period. Little Auks fed exclusively on copepods and amphipods (94% Calanus finmarchicus ) usually captured within 2.5 km of the colony. Feeding rhythms fitted closely the known diurnal vertical migrations of Calanus with peaks between 2200 and 0800 h. Some individuals within subcolony groups showed synchrony of feeds, mainly between 1800 and 2400 h. The mean number of feeds to a chick in 24 h was 5.25. Growth rates of young were comparable between all four experimental groups and controls, although the latter attained higher weights. Mean daily weight increases were constant until 18 days of age when they declined sharply. This was not reflected in a change in mean daily weight increases with date and so suggests that food availability had not declined. Instead there was a reduced feeding rate to chicks from age 21 days to fledging. Breeding success was 50 %, mainly the result of egg desertion and predation by Arctic Foxes, and this may have been reduced by our own activities. Behaviour postures and the responses they elicited are described together with the diurnal patterns of different activities. Aerial flights are also described and their possible function discussed. It is concluded that the shortness of the time when abundant food is available has encouraged close breeding synchrony and this is achieved by mass flights and rafting on the sea beside the colony, and subdivision of the colony into groups with ... Article in Journal/Newspaper Alle alle Arctic Calanus finmarchicus Greenland little auk Copepods Head Island Wiley Online Library Arctic Greenland Head Island ENVELOPE(-62.917,-62.917,-64.517,-64.517) Horse Head ENVELOPE(-36.500,-36.500,-54.283,-54.283) Ibis 123 1 1 18 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Summary A study of the breeding biology, feeding ecology, and behaviour of the Little Auk was carried out on Horse Head Island (73° 38′ N, 57° 08′ W) in west Greenland between July and August 1974. Distinct subcolony groups were recognized within the colony. During incubation, attendance at the colony increased to a peak between 2100 and 2400 h, with large rafts building up on the sea before engaging in aerial flights and then settling on land. During the nestling period, this pattern changed with further peaks at 0600 and 1800 h, and a decline during the afternoon, particularly during the late nestling period. Little Auks fed exclusively on copepods and amphipods (94% Calanus finmarchicus ) usually captured within 2.5 km of the colony. Feeding rhythms fitted closely the known diurnal vertical migrations of Calanus with peaks between 2200 and 0800 h. Some individuals within subcolony groups showed synchrony of feeds, mainly between 1800 and 2400 h. The mean number of feeds to a chick in 24 h was 5.25. Growth rates of young were comparable between all four experimental groups and controls, although the latter attained higher weights. Mean daily weight increases were constant until 18 days of age when they declined sharply. This was not reflected in a change in mean daily weight increases with date and so suggests that food availability had not declined. Instead there was a reduced feeding rate to chicks from age 21 days to fledging. Breeding success was 50 %, mainly the result of egg desertion and predation by Arctic Foxes, and this may have been reduced by our own activities. Behaviour postures and the responses they elicited are described together with the diurnal patterns of different activities. Aerial flights are also described and their possible function discussed. It is concluded that the shortness of the time when abundant food is available has encouraged close breeding synchrony and this is achieved by mass flights and rafting on the sea beside the colony, and subdivision of the colony into groups with ... |
format |
Article in Journal/Newspaper |
author |
Evans, P. G. H. |
spellingShingle |
Evans, P. G. H. ECOLOGY AND BEHAVIOUR OF THE LITTLE AUK ALLE ALLE IN WEST GREENLAND |
author_facet |
Evans, P. G. H. |
author_sort |
Evans, P. G. H. |
title |
ECOLOGY AND BEHAVIOUR OF THE LITTLE AUK ALLE ALLE IN WEST GREENLAND |
title_short |
ECOLOGY AND BEHAVIOUR OF THE LITTLE AUK ALLE ALLE IN WEST GREENLAND |
title_full |
ECOLOGY AND BEHAVIOUR OF THE LITTLE AUK ALLE ALLE IN WEST GREENLAND |
title_fullStr |
ECOLOGY AND BEHAVIOUR OF THE LITTLE AUK ALLE ALLE IN WEST GREENLAND |
title_full_unstemmed |
ECOLOGY AND BEHAVIOUR OF THE LITTLE AUK ALLE ALLE IN WEST GREENLAND |
title_sort |
ecology and behaviour of the little auk alle alle in west greenland |
publisher |
Wiley |
publishDate |
1981 |
url |
http://dx.doi.org/10.1111/j.1474-919x.1981.tb00168.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1981.tb00168.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1981.tb00168.x |
long_lat |
ENVELOPE(-62.917,-62.917,-64.517,-64.517) ENVELOPE(-36.500,-36.500,-54.283,-54.283) |
geographic |
Arctic Greenland Head Island Horse Head |
geographic_facet |
Arctic Greenland Head Island Horse Head |
genre |
Alle alle Arctic Calanus finmarchicus Greenland little auk Copepods Head Island |
genre_facet |
Alle alle Arctic Calanus finmarchicus Greenland little auk Copepods Head Island |
op_source |
Ibis volume 123, issue 1, page 1-18 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1474-919x.1981.tb00168.x |
container_title |
Ibis |
container_volume |
123 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
18 |
_version_ |
1800743903590088704 |