Foraging behaviour of Razorbills Alca torda during chick-rearing at the largest colony in the Baltic Sea
Capsule: Foraging behaviour in the Razorbill Alca torda during breeding was similar to that found elsewhere, aside from dive shape. Aims: To investigate the foraging behaviour of Razorbills during the breeding season at the largest colony in the central Baltic Sea. Methods: A combination of global p...
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ftdatacite:10.6084/m9.figshare.7638632 2023-05-15T13:12:14+02:00 Foraging behaviour of Razorbills Alca torda during chick-rearing at the largest colony in the Baltic Sea Isaksson, Natalie Evans, Tom J. Olsson, Olof Åkesson, Susanne 2019 https://dx.doi.org/10.6084/m9.figshare.7638632 https://tandf.figshare.com/articles/Foraging_behaviour_of_Razorbills_i_Alca_torda_i_during_chick-rearing_at_the_largest_colony_in_the_Baltic_Sea/7638632 unknown Taylor & Francis https://dx.doi.org/10.1080/00063657.2018.1563044 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Developmental Biology Inorganic Chemistry Science Policy Text article-journal Journal contribution ScholarlyArticle 2019 ftdatacite https://doi.org/10.6084/m9.figshare.7638632 https://doi.org/10.1080/00063657.2018.1563044 2021-11-05T12:55:41Z Capsule: Foraging behaviour in the Razorbill Alca torda during breeding was similar to that found elsewhere, aside from dive shape. Aims: To investigate the foraging behaviour of Razorbills during the breeding season at the largest colony in the central Baltic Sea. Methods: A combination of global positioning system (GPS) and time-depth recorder (TDR) devices were used on Razorbills breeding on the island of Stora Karlsö, Baltic Sea, during the chick-rearing period. Results: Five GPS tracks and nine TDR logs were retrieved from 12 Razorbills, and 7399 dives were analysed. Razorbills foraged south and southwest of the colony. Maximum and mean (±sd) foraging range from the colony was 72.7 km and 13.1 ± 13.5 km, respectively. Mean dive depth (15.3 ± 2.4 m) and duration (53.1 ± 8.5 s) were similar to those of a more southern Baltic Sea Razorbill colony. Dive depth had a bimodal distribution, with 70% of dives deeper than 10 m and 30% shallower than 10 m. There was a clear diel foraging pattern with 89% of dives occurring during daytime and a higher proportion of shallow dives at night. Unexpectedly, dives were primarily U-shaped. The Razorbills spent 31% of their overall time activity budget flying or diving. Conclusion: Aside from dive shape, foraging behaviour was consistent with that reported at other colonies of Razorbills. Inconsistency in dive shape may be due to a bimodal foraging strategy, local prey behaviour or competition with the Common Guillemot Uria aalge . Text Alca torda common guillemot Razorbill Uria aalge uria DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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language |
unknown |
topic |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Developmental Biology Inorganic Chemistry Science Policy |
spellingShingle |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Developmental Biology Inorganic Chemistry Science Policy Isaksson, Natalie Evans, Tom J. Olsson, Olof Åkesson, Susanne Foraging behaviour of Razorbills Alca torda during chick-rearing at the largest colony in the Baltic Sea |
topic_facet |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology FOS Biological sciences 69999 Biological Sciences not elsewhere classified Developmental Biology Inorganic Chemistry Science Policy |
description |
Capsule: Foraging behaviour in the Razorbill Alca torda during breeding was similar to that found elsewhere, aside from dive shape. Aims: To investigate the foraging behaviour of Razorbills during the breeding season at the largest colony in the central Baltic Sea. Methods: A combination of global positioning system (GPS) and time-depth recorder (TDR) devices were used on Razorbills breeding on the island of Stora Karlsö, Baltic Sea, during the chick-rearing period. Results: Five GPS tracks and nine TDR logs were retrieved from 12 Razorbills, and 7399 dives were analysed. Razorbills foraged south and southwest of the colony. Maximum and mean (±sd) foraging range from the colony was 72.7 km and 13.1 ± 13.5 km, respectively. Mean dive depth (15.3 ± 2.4 m) and duration (53.1 ± 8.5 s) were similar to those of a more southern Baltic Sea Razorbill colony. Dive depth had a bimodal distribution, with 70% of dives deeper than 10 m and 30% shallower than 10 m. There was a clear diel foraging pattern with 89% of dives occurring during daytime and a higher proportion of shallow dives at night. Unexpectedly, dives were primarily U-shaped. The Razorbills spent 31% of their overall time activity budget flying or diving. Conclusion: Aside from dive shape, foraging behaviour was consistent with that reported at other colonies of Razorbills. Inconsistency in dive shape may be due to a bimodal foraging strategy, local prey behaviour or competition with the Common Guillemot Uria aalge . |
format |
Text |
author |
Isaksson, Natalie Evans, Tom J. Olsson, Olof Åkesson, Susanne |
author_facet |
Isaksson, Natalie Evans, Tom J. Olsson, Olof Åkesson, Susanne |
author_sort |
Isaksson, Natalie |
title |
Foraging behaviour of Razorbills Alca torda during chick-rearing at the largest colony in the Baltic Sea |
title_short |
Foraging behaviour of Razorbills Alca torda during chick-rearing at the largest colony in the Baltic Sea |
title_full |
Foraging behaviour of Razorbills Alca torda during chick-rearing at the largest colony in the Baltic Sea |
title_fullStr |
Foraging behaviour of Razorbills Alca torda during chick-rearing at the largest colony in the Baltic Sea |
title_full_unstemmed |
Foraging behaviour of Razorbills Alca torda during chick-rearing at the largest colony in the Baltic Sea |
title_sort |
foraging behaviour of razorbills alca torda during chick-rearing at the largest colony in the baltic sea |
publisher |
Taylor & Francis |
publishDate |
2019 |
url |
https://dx.doi.org/10.6084/m9.figshare.7638632 https://tandf.figshare.com/articles/Foraging_behaviour_of_Razorbills_i_Alca_torda_i_during_chick-rearing_at_the_largest_colony_in_the_Baltic_Sea/7638632 |
genre |
Alca torda common guillemot Razorbill Uria aalge uria |
genre_facet |
Alca torda common guillemot Razorbill Uria aalge uria |
op_relation |
https://dx.doi.org/10.1080/00063657.2018.1563044 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.7638632 https://doi.org/10.1080/00063657.2018.1563044 |
_version_ |
1766250906255360000 |