Feeding strategies of the Short-tailed Shearwater vary by year and sea-surface temperature but do not affect breeding success
To understand how animals cope with environmental variability it is necessary to identify the degree of flexibility in a species' diet and foraging mode and the consequences of this flexibility for reproduction. We examined rates of feeding and energy delivery to chicks by a long-lived pelagic...
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Online Access: | http://hdl.handle.net/2440/82765 https://doi.org/10.1525/cond.2013.120197 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/82765 2023-12-17T10:49:06+01:00 Feeding strategies of the Short-tailed Shearwater vary by year and sea-surface temperature but do not affect breeding success Einoder, L. Page, B. Goldsworthy, S. 2013 http://hdl.handle.net/2440/82765 https://doi.org/10.1525/cond.2013.120197 en eng Cooper Ornithological Soc Condor: an international journal of avian biology, 2013; 115(4):777-787 0010-5422 1938-5129 http://hdl.handle.net/2440/82765 doi:10.1525/cond.2013.120197 © The Cooper Ornithological Society 2013 http://dx.doi.org/10.1525/cond.2013.120197 chick condition feeding rate energy flow flexibility sea-surface temperature Journal article 2013 ftunivadelaidedl https://doi.org/10.1525/cond.2013.120197 2023-11-20T23:15:36Z To understand how animals cope with environmental variability it is necessary to identify the degree of flexibility in a species' diet and foraging mode and the consequences of this flexibility for reproduction. We examined rates of feeding and energy delivery to chicks by a long-lived pelagic seabird, the Short-tailed Shearwater (Puffinus tenuirostris). Individual adults alternated between foraging trips of short and long duration in a dual foraging strategy, but the allocation of time on those trips varied significantly from year to year. In two years when sea-surface temperatures of feeding grounds exploited during short trips were cooler (2005, 2006) adults initially fed their chick more often, then feeding decreased through the chick-rearing period. In the following year of warmer sea-surface temperature (2007), the number of feedings per day was initially low but increased through chick rearing. Despite varied feeding patterns, breeding success was consistently high, yet in 2006 the chicks' poor condition indicates the capacity for buffering chicks from these effects was lower than in other years. The relative contribution of short and long trips to the amount of energy delivered to chicks also varied by year. During local food shortages, shearwaters appeared to deliver more oil from long trips and increased the frequency of short trips. Yet in 2006, low-calorie prey from short trips coincided with low volume of stomach oil from long trips, resulting in chicks' poorer condition. Oil volume and increased short-trip foraging provide potential mechanisms of flexibility enabling adults to buffer prey delivery to chicks during food shortages. Luke D. Einoder, Bradley Page and Simon D. Goldsworthy Article in Journal/Newspaper Puffinus tenuirostris The University of Adelaide: Digital Library Luke ENVELOPE(-94.855,-94.855,56.296,56.296) The Condor 115 4 777 787 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
chick condition feeding rate energy flow flexibility sea-surface temperature |
spellingShingle |
chick condition feeding rate energy flow flexibility sea-surface temperature Einoder, L. Page, B. Goldsworthy, S. Feeding strategies of the Short-tailed Shearwater vary by year and sea-surface temperature but do not affect breeding success |
topic_facet |
chick condition feeding rate energy flow flexibility sea-surface temperature |
description |
To understand how animals cope with environmental variability it is necessary to identify the degree of flexibility in a species' diet and foraging mode and the consequences of this flexibility for reproduction. We examined rates of feeding and energy delivery to chicks by a long-lived pelagic seabird, the Short-tailed Shearwater (Puffinus tenuirostris). Individual adults alternated between foraging trips of short and long duration in a dual foraging strategy, but the allocation of time on those trips varied significantly from year to year. In two years when sea-surface temperatures of feeding grounds exploited during short trips were cooler (2005, 2006) adults initially fed their chick more often, then feeding decreased through the chick-rearing period. In the following year of warmer sea-surface temperature (2007), the number of feedings per day was initially low but increased through chick rearing. Despite varied feeding patterns, breeding success was consistently high, yet in 2006 the chicks' poor condition indicates the capacity for buffering chicks from these effects was lower than in other years. The relative contribution of short and long trips to the amount of energy delivered to chicks also varied by year. During local food shortages, shearwaters appeared to deliver more oil from long trips and increased the frequency of short trips. Yet in 2006, low-calorie prey from short trips coincided with low volume of stomach oil from long trips, resulting in chicks' poorer condition. Oil volume and increased short-trip foraging provide potential mechanisms of flexibility enabling adults to buffer prey delivery to chicks during food shortages. Luke D. Einoder, Bradley Page and Simon D. Goldsworthy |
format |
Article in Journal/Newspaper |
author |
Einoder, L. Page, B. Goldsworthy, S. |
author_facet |
Einoder, L. Page, B. Goldsworthy, S. |
author_sort |
Einoder, L. |
title |
Feeding strategies of the Short-tailed Shearwater vary by year and sea-surface temperature but do not affect breeding success |
title_short |
Feeding strategies of the Short-tailed Shearwater vary by year and sea-surface temperature but do not affect breeding success |
title_full |
Feeding strategies of the Short-tailed Shearwater vary by year and sea-surface temperature but do not affect breeding success |
title_fullStr |
Feeding strategies of the Short-tailed Shearwater vary by year and sea-surface temperature but do not affect breeding success |
title_full_unstemmed |
Feeding strategies of the Short-tailed Shearwater vary by year and sea-surface temperature but do not affect breeding success |
title_sort |
feeding strategies of the short-tailed shearwater vary by year and sea-surface temperature but do not affect breeding success |
publisher |
Cooper Ornithological Soc |
publishDate |
2013 |
url |
http://hdl.handle.net/2440/82765 https://doi.org/10.1525/cond.2013.120197 |
long_lat |
ENVELOPE(-94.855,-94.855,56.296,56.296) |
geographic |
Luke |
geographic_facet |
Luke |
genre |
Puffinus tenuirostris |
genre_facet |
Puffinus tenuirostris |
op_source |
http://dx.doi.org/10.1525/cond.2013.120197 |
op_relation |
Condor: an international journal of avian biology, 2013; 115(4):777-787 0010-5422 1938-5129 http://hdl.handle.net/2440/82765 doi:10.1525/cond.2013.120197 |
op_rights |
© The Cooper Ornithological Society 2013 |
op_doi |
https://doi.org/10.1525/cond.2013.120197 |
container_title |
The Condor |
container_volume |
115 |
container_issue |
4 |
container_start_page |
777 |
op_container_end_page |
787 |
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1785573467300560896 |