Spatial and temporal variation in foraging of breeding red-throated divers
Differing environmental conditions can have profound effects on many behaviours in animals, especially where species have large geographic ranges. Seasonal changes or progression through life history stages impose differential constraints, leading to changes in behaviours. Furthermore, species which...
Published in: | Journal of Avian Biology |
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2021
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ftuniaarhuspubl:oai:pure.atira.dk:publications/a71b61c7-edfd-4953-aee0-52d73a85ced3 2024-04-28T08:26:07+00:00 Spatial and temporal variation in foraging of breeding red-throated divers Duckworth, J. O'Brien, S. Petersen, I. K. Petersen, A. Benediktsson, G. Johnson, L. Lehikoinen, P. Okill, D. Väisänen, R. Williams, J. Williams, S. Daunt, F. Green, J. A. 2021-06 https://pure.au.dk/portal/en/publications/a71b61c7-edfd-4953-aee0-52d73a85ced3 https://doi.org/10.1111/jav.02702 http://www.scopus.com/inward/record.url?scp=85104717598&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/a71b61c7-edfd-4953-aee0-52d73a85ced3 info:eu-repo/semantics/openAccess Duckworth , J , O'Brien , S , Petersen , I K , Petersen , A , Benediktsson , G , Johnson , L , Lehikoinen , P , Okill , D , Väisänen , R , Williams , J , Williams , S , Daunt , F & Green , J A 2021 , ' Spatial and temporal variation in foraging of breeding red-throated divers ' , Journal of Avian Biology , vol. 52 , no. 6 , JAV12777 . https://doi.org/10.1111/jav.02702 behaviour diving foraging ecology Gavia loon article 2021 ftuniaarhuspubl https://doi.org/10.1111/jav.02702 2024-04-10T23:46:40Z Differing environmental conditions can have profound effects on many behaviours in animals, especially where species have large geographic ranges. Seasonal changes or progression through life history stages impose differential constraints, leading to changes in behaviours. Furthermore, species which show flexibility in behaviours, may have a higher capacity to adapt to anthropogenic-induced changes to their environment. The red-throated diver (RTD) is an aquatic bird, that is able to forage in both freshwater and marine environments, though little else is known about its behaviours and its capacity to adapt to different environmental conditions. Here, we use time-depth recorders and saltwater immersion loggers to examine the foraging behaviour of RTDs from three regions across northwest Europe. We found that in the breeding season, birds from two regions (Iceland and Scotland) foraged in the marine environment, while birds from Finland, foraged predominantly in freshwater. Most of the differences in diving characteristics were at least partly explained by differences in foraging habitat. Additionally, while time spent foraging did not change through the breeding season, dives generally became more pelagic and less benthic over the season, suggesting RTDs either switched prey or followed vertical prey movements, rather than increasing foraging effort. There was a preference for foraging in daylight over crepuscular hours, with a stronger effect at two of the three sites. Overall, we provide the first investigation of RTD foraging and diving behaviour from multiple geographic regions and demonstrate variation in foraging strategies in this generalist aquatic predator, most likely due to differences in their local environment. Article in Journal/Newspaper Iceland Aarhus University: Research Journal of Avian Biology 52 6 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
behaviour diving foraging ecology Gavia loon |
spellingShingle |
behaviour diving foraging ecology Gavia loon Duckworth, J. O'Brien, S. Petersen, I. K. Petersen, A. Benediktsson, G. Johnson, L. Lehikoinen, P. Okill, D. Väisänen, R. Williams, J. Williams, S. Daunt, F. Green, J. A. Spatial and temporal variation in foraging of breeding red-throated divers |
topic_facet |
behaviour diving foraging ecology Gavia loon |
description |
Differing environmental conditions can have profound effects on many behaviours in animals, especially where species have large geographic ranges. Seasonal changes or progression through life history stages impose differential constraints, leading to changes in behaviours. Furthermore, species which show flexibility in behaviours, may have a higher capacity to adapt to anthropogenic-induced changes to their environment. The red-throated diver (RTD) is an aquatic bird, that is able to forage in both freshwater and marine environments, though little else is known about its behaviours and its capacity to adapt to different environmental conditions. Here, we use time-depth recorders and saltwater immersion loggers to examine the foraging behaviour of RTDs from three regions across northwest Europe. We found that in the breeding season, birds from two regions (Iceland and Scotland) foraged in the marine environment, while birds from Finland, foraged predominantly in freshwater. Most of the differences in diving characteristics were at least partly explained by differences in foraging habitat. Additionally, while time spent foraging did not change through the breeding season, dives generally became more pelagic and less benthic over the season, suggesting RTDs either switched prey or followed vertical prey movements, rather than increasing foraging effort. There was a preference for foraging in daylight over crepuscular hours, with a stronger effect at two of the three sites. Overall, we provide the first investigation of RTD foraging and diving behaviour from multiple geographic regions and demonstrate variation in foraging strategies in this generalist aquatic predator, most likely due to differences in their local environment. |
format |
Article in Journal/Newspaper |
author |
Duckworth, J. O'Brien, S. Petersen, I. K. Petersen, A. Benediktsson, G. Johnson, L. Lehikoinen, P. Okill, D. Väisänen, R. Williams, J. Williams, S. Daunt, F. Green, J. A. |
author_facet |
Duckworth, J. O'Brien, S. Petersen, I. K. Petersen, A. Benediktsson, G. Johnson, L. Lehikoinen, P. Okill, D. Väisänen, R. Williams, J. Williams, S. Daunt, F. Green, J. A. |
author_sort |
Duckworth, J. |
title |
Spatial and temporal variation in foraging of breeding red-throated divers |
title_short |
Spatial and temporal variation in foraging of breeding red-throated divers |
title_full |
Spatial and temporal variation in foraging of breeding red-throated divers |
title_fullStr |
Spatial and temporal variation in foraging of breeding red-throated divers |
title_full_unstemmed |
Spatial and temporal variation in foraging of breeding red-throated divers |
title_sort |
spatial and temporal variation in foraging of breeding red-throated divers |
publishDate |
2021 |
url |
https://pure.au.dk/portal/en/publications/a71b61c7-edfd-4953-aee0-52d73a85ced3 https://doi.org/10.1111/jav.02702 http://www.scopus.com/inward/record.url?scp=85104717598&partnerID=8YFLogxK |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Duckworth , J , O'Brien , S , Petersen , I K , Petersen , A , Benediktsson , G , Johnson , L , Lehikoinen , P , Okill , D , Väisänen , R , Williams , J , Williams , S , Daunt , F & Green , J A 2021 , ' Spatial and temporal variation in foraging of breeding red-throated divers ' , Journal of Avian Biology , vol. 52 , no. 6 , JAV12777 . https://doi.org/10.1111/jav.02702 |
op_relation |
https://pure.au.dk/portal/en/publications/a71b61c7-edfd-4953-aee0-52d73a85ced3 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/jav.02702 |
container_title |
Journal of Avian Biology |
container_volume |
52 |
container_issue |
6 |
_version_ |
1797585638149586944 |