Poor flight performance in deep-diving cormorants.
International audience Aerial flight and breath-hold diving present conflicting morphological and physiological demands, and hence diving seabirds capable of flight are expected to face evolutionary trade-offs regarding locomotory performances. We tested whether Kerguelen shags Phalacrocorax verruco...
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Online Access: | https://doi.org/10.1242/jeb.050161 https://hal.archives-ouvertes.fr/hal-00561365 |
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fttriple:oai:gotriple.eu:10670/1.8p85n7 2023-05-15T15:45:00+02:00 Poor flight performance in deep-diving cormorants. Watanabe, Yuuki Y Takahashi, Akinori Sato, Katsufumi Viviant, Morgane Bost, Charles-André National Insitute of Polar Research National Institute of Polar Research Tokyo (NiPR) International Coastal Research Center The University of Tokyo (UTokyo) Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) 2011-02-01 https://doi.org/10.1242/jeb.050161 https://hal.archives-ouvertes.fr/hal-00561365 en eng HAL CCSD The Company of Biologists hal-00561365 doi:10.1242/jeb.050161 PUBMED: 21228200 10670/1.8p85n7 https://hal.archives-ouvertes.fr/hal-00561365 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0022-0949 EISSN: 1477-9145 Journal of Experimental Biology Journal of Experimental Biology, The Company of Biologists, 2011, 214 (Pt 3), pp.412-21. ⟨10.1242/jeb.050161⟩ accelerometer blue-eyed shag data logger flight speed GPS tracking power curve geo manag Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2011 fttriple https://doi.org/10.1242/jeb.050161 2023-01-22T16:40:46Z International audience Aerial flight and breath-hold diving present conflicting morphological and physiological demands, and hence diving seabirds capable of flight are expected to face evolutionary trade-offs regarding locomotory performances. We tested whether Kerguelen shags Phalacrocorax verrucosus, which are remarkable divers, have poor flight capability using newly developed tags that recorded their flight air speed (the first direct measurement for wild birds) with propeller sensors, flight duration, GPS position and depth during foraging trips. Flight air speed (mean 12.7 m s(-1)) was close to the speed that minimizes power requirement, rather than energy expenditure per distance, when existing aerodynamic models were applied. Flights were short (mean 92 s), with a mean summed duration of only 24 min day(-1). Shags sometimes stayed at the sea surface without diving between flights, even on the way back to the colony, and surface durations increased with the preceding flight durations; these observations suggest that shags rested after flights. Our results indicate that their flight performance is physiologically limited, presumably compromised by their great diving capability (max. depth 94 m, duration 306 s) through their morphological adaptations for diving, including large body mass (enabling a large oxygen store), small flight muscles (to allow for large leg muscles for underwater propulsion) and short wings (to decrease air volume in the feathers and hence buoyancy). The compromise between flight and diving, as well as the local bathymetry, shape the three-dimensional foraging range (<26 km horizontally, <94 m vertically) in this bottom-feeding cormorant. Article in Journal/Newspaper Blue Eyed Shag Unknown Kerguelen Journal of Experimental Biology 214 3 412 421 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
accelerometer blue-eyed shag data logger flight speed GPS tracking power curve geo manag |
spellingShingle |
accelerometer blue-eyed shag data logger flight speed GPS tracking power curve geo manag Watanabe, Yuuki Y Takahashi, Akinori Sato, Katsufumi Viviant, Morgane Bost, Charles-André Poor flight performance in deep-diving cormorants. |
topic_facet |
accelerometer blue-eyed shag data logger flight speed GPS tracking power curve geo manag |
description |
International audience Aerial flight and breath-hold diving present conflicting morphological and physiological demands, and hence diving seabirds capable of flight are expected to face evolutionary trade-offs regarding locomotory performances. We tested whether Kerguelen shags Phalacrocorax verrucosus, which are remarkable divers, have poor flight capability using newly developed tags that recorded their flight air speed (the first direct measurement for wild birds) with propeller sensors, flight duration, GPS position and depth during foraging trips. Flight air speed (mean 12.7 m s(-1)) was close to the speed that minimizes power requirement, rather than energy expenditure per distance, when existing aerodynamic models were applied. Flights were short (mean 92 s), with a mean summed duration of only 24 min day(-1). Shags sometimes stayed at the sea surface without diving between flights, even on the way back to the colony, and surface durations increased with the preceding flight durations; these observations suggest that shags rested after flights. Our results indicate that their flight performance is physiologically limited, presumably compromised by their great diving capability (max. depth 94 m, duration 306 s) through their morphological adaptations for diving, including large body mass (enabling a large oxygen store), small flight muscles (to allow for large leg muscles for underwater propulsion) and short wings (to decrease air volume in the feathers and hence buoyancy). The compromise between flight and diving, as well as the local bathymetry, shape the three-dimensional foraging range (<26 km horizontally, <94 m vertically) in this bottom-feeding cormorant. |
author2 |
National Insitute of Polar Research National Institute of Polar Research Tokyo (NiPR) International Coastal Research Center The University of Tokyo (UTokyo) Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Watanabe, Yuuki Y Takahashi, Akinori Sato, Katsufumi Viviant, Morgane Bost, Charles-André |
author_facet |
Watanabe, Yuuki Y Takahashi, Akinori Sato, Katsufumi Viviant, Morgane Bost, Charles-André |
author_sort |
Watanabe, Yuuki Y |
title |
Poor flight performance in deep-diving cormorants. |
title_short |
Poor flight performance in deep-diving cormorants. |
title_full |
Poor flight performance in deep-diving cormorants. |
title_fullStr |
Poor flight performance in deep-diving cormorants. |
title_full_unstemmed |
Poor flight performance in deep-diving cormorants. |
title_sort |
poor flight performance in deep-diving cormorants. |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://doi.org/10.1242/jeb.050161 https://hal.archives-ouvertes.fr/hal-00561365 |
geographic |
Kerguelen |
geographic_facet |
Kerguelen |
genre |
Blue Eyed Shag |
genre_facet |
Blue Eyed Shag |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0022-0949 EISSN: 1477-9145 Journal of Experimental Biology Journal of Experimental Biology, The Company of Biologists, 2011, 214 (Pt 3), pp.412-21. ⟨10.1242/jeb.050161⟩ |
op_relation |
hal-00561365 doi:10.1242/jeb.050161 PUBMED: 21228200 10670/1.8p85n7 https://hal.archives-ouvertes.fr/hal-00561365 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1242/jeb.050161 |
container_title |
Journal of Experimental Biology |
container_volume |
214 |
container_issue |
3 |
container_start_page |
412 |
op_container_end_page |
421 |
_version_ |
1766379372806144000 |