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...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/331675 2024-01-07T09:44:16+01:00 Spatial and temporal variation in foraging of breeding red‐throated divers Duckworth, James O'Brien, Sue Petersen, Ib Krag Petersen, Aevar Benediktsson, G. Johnson, Logan Lehikoinen, Petteri Okill, David Väisänen, Roni Williams, Jim Williams, Stuart Daunt, Francis Green, Jonathan A. Organismal and Evolutionary Biology Research Programme Finnish Museum of Natural History Zoology 2021-06-21T09:49:01Z 12 application/pdf http://hdl.handle.net/10138/331675 eng eng Wiley 10.1111/jav.02702 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 . https://doi.org/10.1111/jav.02702 ORCID: /0000-0002-2272-024X/work/95866041 02ad66ab-0cdb-4af7-8e2a-e6b401aa082b http://hdl.handle.net/10138/331675 000642495400001 cc_by openAccess info:eu-repo/semantics/openAccess Gavia behaviour diving foraging ecology loon 1181 Ecology evolutionary biology Article publishedVersion 2021 ftunivhelsihelda 2023-12-14T00:02:40Z 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. Peer reviewed Article in Journal/Newspaper Iceland HELDA – University of Helsinki Open Repository Journal of Avian Biology 52 6 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Gavia behaviour diving foraging ecology loon 1181 Ecology evolutionary biology |
spellingShingle |
Gavia behaviour diving foraging ecology loon 1181 Ecology evolutionary biology Duckworth, James O'Brien, Sue Petersen, Ib Krag Petersen, Aevar Benediktsson, G. Johnson, Logan Lehikoinen, Petteri Okill, David Väisänen, Roni Williams, Jim Williams, Stuart Daunt, Francis Green, Jonathan A. Spatial and temporal variation in foraging of breeding red‐throated divers |
topic_facet |
Gavia behaviour diving foraging ecology loon 1181 Ecology evolutionary biology |
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. Peer reviewed |
author2 |
Organismal and Evolutionary Biology Research Programme Finnish Museum of Natural History Zoology |
format |
Article in Journal/Newspaper |
author |
Duckworth, James O'Brien, Sue Petersen, Ib Krag Petersen, Aevar Benediktsson, G. Johnson, Logan Lehikoinen, Petteri Okill, David Väisänen, Roni Williams, Jim Williams, Stuart Daunt, Francis Green, Jonathan A. |
author_facet |
Duckworth, James O'Brien, Sue Petersen, Ib Krag Petersen, Aevar Benediktsson, G. Johnson, Logan Lehikoinen, Petteri Okill, David Väisänen, Roni Williams, Jim Williams, Stuart Daunt, Francis Green, Jonathan A. |
author_sort |
Duckworth, James |
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 |
publisher |
Wiley |
publishDate |
2021 |
url |
http://hdl.handle.net/10138/331675 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
10.1111/jav.02702 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 . https://doi.org/10.1111/jav.02702 ORCID: /0000-0002-2272-024X/work/95866041 02ad66ab-0cdb-4af7-8e2a-e6b401aa082b http://hdl.handle.net/10138/331675 000642495400001 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
container_title |
Journal of Avian Biology |
container_volume |
52 |
container_issue |
6 |
_version_ |
1787425619862093824 |