Effect of brood size on growth in the Chinstrap Penguin: A field experiment
In order to determine if the patterns of chick growth and mortality observed in two-chick broods of the Chinstrap Penguin (Pygoscelis antarctica) are affected by the feeding capacity of parents, we performed an experimental brood reduction at hatching by removing one sibling in some broods and compa...
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Association of Field Ornithologists
1998
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ftcsic:oai:digital.csic.es:10261/66785 2024-02-11T09:56:57+01:00 Effect of brood size on growth in the Chinstrap Penguin: A field experiment Moreno Klemming, Juan Viñuela, Javier Belliure, Josabel Ferrer, Miguel 1998 http://hdl.handle.net/10261/66785 en eng Association of Field Ornithologists issn: 0273-8570 Journal of Field Ornithology 69: 269- 275 (1998) http://hdl.handle.net/10261/66785 none artículo http://purl.org/coar/resource_type/c_6501 1998 ftcsic 2024-01-16T09:45:27Z In order to determine if the patterns of chick growth and mortality observed in two-chick broods of the Chinstrap Penguin (Pygoscelis antarctica) are affected by the feeding capacity of parents, we performed an experimental brood reduction at hatching by removing one sibling in some broods and comparing the growth and mortality patterns of these single chicks with those of control broods with two chicks. Chicks in reduced broods had longer flippers than those in control broods at 15, 21 and 47 days of age, and longer bills at 15, 21 and 32 days, but no differences in mass were found. Although more control than reduced broods suffered chick mortality, the productivity of control broods was markedly higher. Brood size has significant effects on final chick size in the Chinstrap penguin. Food limitation operated mainly at the end of the guard stage, although its effects were still significant during the crèche stage. Although the effect of brood size on growth may be more marked in last-hatched chicks, it can also be noted in first-hatched chicks. Growth may act as a fine-tuning mechanism to regulate productivity in this species, allowing parents to raise two chicks, but at the cost of slower growth and smaller final size. Peer Reviewed Article in Journal/Newspaper Antarc* Antarctica Chinstrap penguin Pygoscelis antarctica Digital.CSIC (Spanish National Research Council) |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
In order to determine if the patterns of chick growth and mortality observed in two-chick broods of the Chinstrap Penguin (Pygoscelis antarctica) are affected by the feeding capacity of parents, we performed an experimental brood reduction at hatching by removing one sibling in some broods and comparing the growth and mortality patterns of these single chicks with those of control broods with two chicks. Chicks in reduced broods had longer flippers than those in control broods at 15, 21 and 47 days of age, and longer bills at 15, 21 and 32 days, but no differences in mass were found. Although more control than reduced broods suffered chick mortality, the productivity of control broods was markedly higher. Brood size has significant effects on final chick size in the Chinstrap penguin. Food limitation operated mainly at the end of the guard stage, although its effects were still significant during the crèche stage. Although the effect of brood size on growth may be more marked in last-hatched chicks, it can also be noted in first-hatched chicks. Growth may act as a fine-tuning mechanism to regulate productivity in this species, allowing parents to raise two chicks, but at the cost of slower growth and smaller final size. Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Moreno Klemming, Juan Viñuela, Javier Belliure, Josabel Ferrer, Miguel |
spellingShingle |
Moreno Klemming, Juan Viñuela, Javier Belliure, Josabel Ferrer, Miguel Effect of brood size on growth in the Chinstrap Penguin: A field experiment |
author_facet |
Moreno Klemming, Juan Viñuela, Javier Belliure, Josabel Ferrer, Miguel |
author_sort |
Moreno Klemming, Juan |
title |
Effect of brood size on growth in the Chinstrap Penguin: A field experiment |
title_short |
Effect of brood size on growth in the Chinstrap Penguin: A field experiment |
title_full |
Effect of brood size on growth in the Chinstrap Penguin: A field experiment |
title_fullStr |
Effect of brood size on growth in the Chinstrap Penguin: A field experiment |
title_full_unstemmed |
Effect of brood size on growth in the Chinstrap Penguin: A field experiment |
title_sort |
effect of brood size on growth in the chinstrap penguin: a field experiment |
publisher |
Association of Field Ornithologists |
publishDate |
1998 |
url |
http://hdl.handle.net/10261/66785 |
genre |
Antarc* Antarctica Chinstrap penguin Pygoscelis antarctica |
genre_facet |
Antarc* Antarctica Chinstrap penguin Pygoscelis antarctica |
op_relation |
issn: 0273-8570 Journal of Field Ornithology 69: 269- 275 (1998) http://hdl.handle.net/10261/66785 |
op_rights |
none |
_version_ |
1790607296145915904 |