Long necks enhance and constrain foraging capacity in aquatic vertebrates
Highly specialized diving birds display substantial dichotomy in neck length with, for example, cormorants and anhingas having extreme necks, while penguins and auks have minimized necks. We attached acceleration loggers to Imperial cormorants Phalacrocorax atriceps and Magellanic penguins Spheniscu...
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ftpubmed:oai:pubmedcentral.nih.gov:5719181 2023-05-15T17:58:36+02:00 Long necks enhance and constrain foraging capacity in aquatic vertebrates Wilson, Rory P. Gómez-Laich, Agustina Sala, Juan-Emilio Dell'Omo, Giacomo Holton, Mark D. Quintana, Flavio 2017-11-29 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5719181/ http://www.ncbi.nlm.nih.gov/pubmed/29142117 https://doi.org/10.1098/rspb.2017.2072 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5719181/ http://www.ncbi.nlm.nih.gov/pubmed/29142117 http://dx.doi.org/10.1098/rspb.2017.2072 © 2017 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. Behaviour Text 2017 ftpubmed https://doi.org/10.1098/rspb.2017.2072 2018-12-02T01:26:42Z Highly specialized diving birds display substantial dichotomy in neck length with, for example, cormorants and anhingas having extreme necks, while penguins and auks have minimized necks. We attached acceleration loggers to Imperial cormorants Phalacrocorax atriceps and Magellanic penguins Spheniscus magellanicus, both foraging in waters over the Patagonian Shelf, to examine the difference in movement between their respective heads and bodies in an attempt to explain this dichotomy. The penguins had head and body attitudes and movements that broadly concurred throughout all phases of their dives. By contrast, although the cormorants followed this pattern during the descent and ascent phases of dives, during the bottom (foraging) phase of the dive, the head angle differed widely from that of the body and its dynamism (measured using vectorial dynamic acceleration) was over four times greater. A simple model indicated that having the head on an extended neck would allow these cormorants to half the energy expenditure that they would expend if their body moved in the way their heads did. This apparently energy-saving solution is likely to lead to greater heat loss though and would seem tenable in slow-swimming species because the loss of streamlining that it engenders would make it detrimental for fast-swimming taxa such as penguins. Text Phalacrocorax atriceps PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 284 1867 20172072 |
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Behaviour Wilson, Rory P. Gómez-Laich, Agustina Sala, Juan-Emilio Dell'Omo, Giacomo Holton, Mark D. Quintana, Flavio Long necks enhance and constrain foraging capacity in aquatic vertebrates |
topic_facet |
Behaviour |
description |
Highly specialized diving birds display substantial dichotomy in neck length with, for example, cormorants and anhingas having extreme necks, while penguins and auks have minimized necks. We attached acceleration loggers to Imperial cormorants Phalacrocorax atriceps and Magellanic penguins Spheniscus magellanicus, both foraging in waters over the Patagonian Shelf, to examine the difference in movement between their respective heads and bodies in an attempt to explain this dichotomy. The penguins had head and body attitudes and movements that broadly concurred throughout all phases of their dives. By contrast, although the cormorants followed this pattern during the descent and ascent phases of dives, during the bottom (foraging) phase of the dive, the head angle differed widely from that of the body and its dynamism (measured using vectorial dynamic acceleration) was over four times greater. A simple model indicated that having the head on an extended neck would allow these cormorants to half the energy expenditure that they would expend if their body moved in the way their heads did. This apparently energy-saving solution is likely to lead to greater heat loss though and would seem tenable in slow-swimming species because the loss of streamlining that it engenders would make it detrimental for fast-swimming taxa such as penguins. |
format |
Text |
author |
Wilson, Rory P. Gómez-Laich, Agustina Sala, Juan-Emilio Dell'Omo, Giacomo Holton, Mark D. Quintana, Flavio |
author_facet |
Wilson, Rory P. Gómez-Laich, Agustina Sala, Juan-Emilio Dell'Omo, Giacomo Holton, Mark D. Quintana, Flavio |
author_sort |
Wilson, Rory P. |
title |
Long necks enhance and constrain foraging capacity in aquatic vertebrates |
title_short |
Long necks enhance and constrain foraging capacity in aquatic vertebrates |
title_full |
Long necks enhance and constrain foraging capacity in aquatic vertebrates |
title_fullStr |
Long necks enhance and constrain foraging capacity in aquatic vertebrates |
title_full_unstemmed |
Long necks enhance and constrain foraging capacity in aquatic vertebrates |
title_sort |
long necks enhance and constrain foraging capacity in aquatic vertebrates |
publisher |
The Royal Society |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5719181/ http://www.ncbi.nlm.nih.gov/pubmed/29142117 https://doi.org/10.1098/rspb.2017.2072 |
genre |
Phalacrocorax atriceps |
genre_facet |
Phalacrocorax atriceps |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5719181/ http://www.ncbi.nlm.nih.gov/pubmed/29142117 http://dx.doi.org/10.1098/rspb.2017.2072 |
op_rights |
© 2017 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. |
op_doi |
https://doi.org/10.1098/rspb.2017.2072 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
284 |
container_issue |
1867 |
container_start_page |
20172072 |
_version_ |
1766167280484352000 |