Pushed for time or saving on fuel: fine-scale energy budgets shed light on currencies in a diving bird
Animals may forage using different currencies depending on whether time minimization or energy maximization is more pertinent at the time. Assessment of net energy acquisition requires detailed information on instantaneous activity-specific power use, which varies according to animal performance, be...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | English |
Published: |
The Royal Society
2009
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2817130 http://www.ncbi.nlm.nih.gov/pubmed/19515661 https://doi.org/10.1098/rspb.2009.0683 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:2817130 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:2817130 2023-05-15T16:53:41+02:00 Pushed for time or saving on fuel: fine-scale energy budgets shed light on currencies in a diving bird Shepard, Emily L. C. Wilson, Rory P. Quintana, Flavio Gómez Laich, Agustina Forman, Dan W. 2009-09-07 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2817130 http://www.ncbi.nlm.nih.gov/pubmed/19515661 https://doi.org/10.1098/rspb.2009.0683 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2817130 http://www.ncbi.nlm.nih.gov/pubmed/19515661 http://dx.doi.org/10.1098/rspb.2009.0683 © 2009 The Royal Society Research articles Text 2009 ftpubmed https://doi.org/10.1098/rspb.2009.0683 2013-09-02T21:12:57Z Animals may forage using different currencies depending on whether time minimization or energy maximization is more pertinent at the time. Assessment of net energy acquisition requires detailed information on instantaneous activity-specific power use, which varies according to animal performance, being influenced, for example, by speed and prey loading, and which has not been measured before in wild animals. We used a new proxy for instantaneous energy expenditure (overall dynamic body acceleration), to quantify foraging effort in a model species, the imperial shag Phalacrocorax atriceps, during diving. Power costs varied nonlinearly with depth exploited owing to depth-related buoyancy. Consequently, solutions for maximizing the gross rate of gain and energetic efficiency differed for dives to any given depth. Dive effort in free-ranging imperial shags measured during the breeding season was consistent with a strategy to maximize the gross rate of energy gain. We suggest that the divergence of time and energy costs with dive depth has implications for the measurement of dive efficiency across diverse diving taxa. Text Imperial Shag Phalacrocorax atriceps PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 276 1670 3149 3155 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Research articles |
spellingShingle |
Research articles Shepard, Emily L. C. Wilson, Rory P. Quintana, Flavio Gómez Laich, Agustina Forman, Dan W. Pushed for time or saving on fuel: fine-scale energy budgets shed light on currencies in a diving bird |
topic_facet |
Research articles |
description |
Animals may forage using different currencies depending on whether time minimization or energy maximization is more pertinent at the time. Assessment of net energy acquisition requires detailed information on instantaneous activity-specific power use, which varies according to animal performance, being influenced, for example, by speed and prey loading, and which has not been measured before in wild animals. We used a new proxy for instantaneous energy expenditure (overall dynamic body acceleration), to quantify foraging effort in a model species, the imperial shag Phalacrocorax atriceps, during diving. Power costs varied nonlinearly with depth exploited owing to depth-related buoyancy. Consequently, solutions for maximizing the gross rate of gain and energetic efficiency differed for dives to any given depth. Dive effort in free-ranging imperial shags measured during the breeding season was consistent with a strategy to maximize the gross rate of energy gain. We suggest that the divergence of time and energy costs with dive depth has implications for the measurement of dive efficiency across diverse diving taxa. |
format |
Text |
author |
Shepard, Emily L. C. Wilson, Rory P. Quintana, Flavio Gómez Laich, Agustina Forman, Dan W. |
author_facet |
Shepard, Emily L. C. Wilson, Rory P. Quintana, Flavio Gómez Laich, Agustina Forman, Dan W. |
author_sort |
Shepard, Emily L. C. |
title |
Pushed for time or saving on fuel: fine-scale energy budgets shed light on currencies in a diving bird |
title_short |
Pushed for time or saving on fuel: fine-scale energy budgets shed light on currencies in a diving bird |
title_full |
Pushed for time or saving on fuel: fine-scale energy budgets shed light on currencies in a diving bird |
title_fullStr |
Pushed for time or saving on fuel: fine-scale energy budgets shed light on currencies in a diving bird |
title_full_unstemmed |
Pushed for time or saving on fuel: fine-scale energy budgets shed light on currencies in a diving bird |
title_sort |
pushed for time or saving on fuel: fine-scale energy budgets shed light on currencies in a diving bird |
publisher |
The Royal Society |
publishDate |
2009 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2817130 http://www.ncbi.nlm.nih.gov/pubmed/19515661 https://doi.org/10.1098/rspb.2009.0683 |
genre |
Imperial Shag Phalacrocorax atriceps |
genre_facet |
Imperial Shag Phalacrocorax atriceps |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2817130 http://www.ncbi.nlm.nih.gov/pubmed/19515661 http://dx.doi.org/10.1098/rspb.2009.0683 |
op_rights |
© 2009 The Royal Society |
op_doi |
https://doi.org/10.1098/rspb.2009.0683 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
276 |
container_issue |
1670 |
container_start_page |
3149 |
op_container_end_page |
3155 |
_version_ |
1766044260980752384 |