Seabirds maintain offspring provisioning rate despite fluctuations in prey abundance: a multi‐species functional response for guillemots in the North Sea
Summary Seabirds that consume more than one prey type may adjust their foraging to maintain provisioning rates for their chicks. How energetically effective are these strategies, and what are the implications for the management of seabirds and their marine habitat? A multi‐species functional respons...
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crwiley:10.1111/1365-2664.12095 2024-06-23T07:52:11+00:00 Seabirds maintain offspring provisioning rate despite fluctuations in prey abundance: a multi‐species functional response for guillemots in the North Sea Smout, Sophie Rindorf, Anna Wanless, Sarah Daunt, Francis Harris, Michael P. Matthiopoulos, Jason Votier, Steve 2013 http://dx.doi.org/10.1111/1365-2664.12095 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2664.12095 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.12095 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Applied Ecology volume 50, issue 4, page 1071-1079 ISSN 0021-8901 1365-2664 journal-article 2013 crwiley https://doi.org/10.1111/1365-2664.12095 2024-06-04T06:41:29Z Summary Seabirds that consume more than one prey type may adjust their foraging to maintain provisioning rates for their chicks. How energetically effective are these strategies, and what are the implications for the management of seabirds and their marine habitat? A multi‐species functional response links consumption rates to the availability of multiple prey types, but fitting multi‐species functional responses to field data can be difficult, requiring consumption measurements over a range of different prey abundances. Such detailed data may be especially difficult to obtain in marine ecosystems. We used annual time‐series data on chick provisioning for the common guillemot U ria aalge together with abundance indices for its two main prey (lesser sandeel A mmodytes marinus and sprat S prattus sprattus ) to parameterize a multi‐species functional response for parents provisioning chicks at a major N orth S ea colony from 1992 to 2005. The fitted model reproduced changes in diet and consumption rate which were consistent with changes in local prey abundance including a long‐term decline in sandeels. The model predicted that energy intake by chicks would be more sensitive to changes in sprat abundance than sandeel abundance. Guillemots appeared able to adjust their foraging tactics over a wide range of prey abundances to maintain a consistent energetic intake rate for chicks. Synthesis and applications . Our results suggest guillemot chicks obtain adequate calorific intake from their parents despite fluctuating prey abundances, conferring some resilience in the face of environmental variation. The parameterized multi‐species functional response model can be used to estimate levels of severe prey shortage that compromise provisioning. It also enables us to interpret predator consumption rates so that these can be used as a metric of prey availability. Further, quantifying trophic links between marine prey and apex predators is needed to support the development of multi‐species models in which the predators can be ... Article in Journal/Newspaper common guillemot Wiley Online Library Journal of Applied Ecology 50 4 1071 1079 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Summary Seabirds that consume more than one prey type may adjust their foraging to maintain provisioning rates for their chicks. How energetically effective are these strategies, and what are the implications for the management of seabirds and their marine habitat? A multi‐species functional response links consumption rates to the availability of multiple prey types, but fitting multi‐species functional responses to field data can be difficult, requiring consumption measurements over a range of different prey abundances. Such detailed data may be especially difficult to obtain in marine ecosystems. We used annual time‐series data on chick provisioning for the common guillemot U ria aalge together with abundance indices for its two main prey (lesser sandeel A mmodytes marinus and sprat S prattus sprattus ) to parameterize a multi‐species functional response for parents provisioning chicks at a major N orth S ea colony from 1992 to 2005. The fitted model reproduced changes in diet and consumption rate which were consistent with changes in local prey abundance including a long‐term decline in sandeels. The model predicted that energy intake by chicks would be more sensitive to changes in sprat abundance than sandeel abundance. Guillemots appeared able to adjust their foraging tactics over a wide range of prey abundances to maintain a consistent energetic intake rate for chicks. Synthesis and applications . Our results suggest guillemot chicks obtain adequate calorific intake from their parents despite fluctuating prey abundances, conferring some resilience in the face of environmental variation. The parameterized multi‐species functional response model can be used to estimate levels of severe prey shortage that compromise provisioning. It also enables us to interpret predator consumption rates so that these can be used as a metric of prey availability. Further, quantifying trophic links between marine prey and apex predators is needed to support the development of multi‐species models in which the predators can be ... |
author2 |
Votier, Steve |
format |
Article in Journal/Newspaper |
author |
Smout, Sophie Rindorf, Anna Wanless, Sarah Daunt, Francis Harris, Michael P. Matthiopoulos, Jason |
spellingShingle |
Smout, Sophie Rindorf, Anna Wanless, Sarah Daunt, Francis Harris, Michael P. Matthiopoulos, Jason Seabirds maintain offspring provisioning rate despite fluctuations in prey abundance: a multi‐species functional response for guillemots in the North Sea |
author_facet |
Smout, Sophie Rindorf, Anna Wanless, Sarah Daunt, Francis Harris, Michael P. Matthiopoulos, Jason |
author_sort |
Smout, Sophie |
title |
Seabirds maintain offspring provisioning rate despite fluctuations in prey abundance: a multi‐species functional response for guillemots in the North Sea |
title_short |
Seabirds maintain offspring provisioning rate despite fluctuations in prey abundance: a multi‐species functional response for guillemots in the North Sea |
title_full |
Seabirds maintain offspring provisioning rate despite fluctuations in prey abundance: a multi‐species functional response for guillemots in the North Sea |
title_fullStr |
Seabirds maintain offspring provisioning rate despite fluctuations in prey abundance: a multi‐species functional response for guillemots in the North Sea |
title_full_unstemmed |
Seabirds maintain offspring provisioning rate despite fluctuations in prey abundance: a multi‐species functional response for guillemots in the North Sea |
title_sort |
seabirds maintain offspring provisioning rate despite fluctuations in prey abundance: a multi‐species functional response for guillemots in the north sea |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1111/1365-2664.12095 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2664.12095 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.12095 |
genre |
common guillemot |
genre_facet |
common guillemot |
op_source |
Journal of Applied Ecology volume 50, issue 4, page 1071-1079 ISSN 0021-8901 1365-2664 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/1365-2664.12095 |
container_title |
Journal of Applied Ecology |
container_volume |
50 |
container_issue |
4 |
container_start_page |
1071 |
op_container_end_page |
1079 |
_version_ |
1802643428782112768 |