Among-individual differences in foraging modulate resource exploitation under perceived predation risk
Foraging is risky and involves balancing the benefits of resource acquisition with costs of predation. Optimal foraging theory predicts where, when and how long to forage in a given spatiotemporal distribution of risks and resources. However, significant variation in foraging behaviour and resource...
Published in: | Oecologia |
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Language: | English |
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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:57613 2023-05-15T17:12:37+02:00 Among-individual differences in foraging modulate resource exploitation under perceived predation risk Eccard, Jana A. (Prof. Dr.) Liesenjohann, Thilo Dammhahn, Melanie 2020-11-03 https://publishup.uni-potsdam.de/frontdoor/index/index/docId/57613 https://doi.org/10.1007/s00442-020-04773-y eng eng https://publishup.uni-potsdam.de/frontdoor/index/index/docId/57613 https://doi.org/10.1007/s00442-020-04773-y https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/closedAccess CC-BY ddc:570 Institut für Biochemie und Biologie article doc-type:article 2020 ftubpotsdam https://doi.org/10.1007/s00442-020-04773-y 2023-01-29T23:32:02Z Foraging is risky and involves balancing the benefits of resource acquisition with costs of predation. Optimal foraging theory predicts where, when and how long to forage in a given spatiotemporal distribution of risks and resources. However, significant variation in foraging behaviour and resource exploitation remain unexplained. Using single foragers in artificial landscapes of perceived risks and resources with diminishing returns, we aimed to test whether foraging behaviour and resource exploitation are adjusted to risk level, vary with risk during different components of foraging, and (co)vary among individuals. We quantified foraging behaviour and resource exploitation for 21 common voles (Microtus arvalis). By manipulating ground cover, we created simple landscapes of two food patches varying in perceived risk during feeding in a patch and/or while travelling between patches. Foraging of individuals was variable and adjusted to risk level and type. High risk during feeding reduced feeding duration and food consumption more strongly than risk while travelling. Risk during travelling modified the risk effects of feeding for changes between patches and resulting evenness of resource exploitation. Across risk conditions individuals differed consistently in when and how long they exploited resources and exposed themselves to risk. These among-individual differences in foraging behaviour were associated with consistent patterns of resource exploitation. Thus, different strategies in foraging-under-risk ultimately lead to unequal payoffs and might affect lower trophic levels in food webs. Inter-individual differences in foraging behaviour, i.e. foraging personalities, are an integral part of foraging behaviour and need to be fully integrated into optimal foraging theory. Article in Journal/Newspaper Microtus arvalis University of Potsdam: publish.UP Oecologia 194 4 621 634 |
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Open Polar |
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University of Potsdam: publish.UP |
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ftubpotsdam |
language |
English |
topic |
ddc:570 Institut für Biochemie und Biologie |
spellingShingle |
ddc:570 Institut für Biochemie und Biologie Eccard, Jana A. (Prof. Dr.) Liesenjohann, Thilo Dammhahn, Melanie Among-individual differences in foraging modulate resource exploitation under perceived predation risk |
topic_facet |
ddc:570 Institut für Biochemie und Biologie |
description |
Foraging is risky and involves balancing the benefits of resource acquisition with costs of predation. Optimal foraging theory predicts where, when and how long to forage in a given spatiotemporal distribution of risks and resources. However, significant variation in foraging behaviour and resource exploitation remain unexplained. Using single foragers in artificial landscapes of perceived risks and resources with diminishing returns, we aimed to test whether foraging behaviour and resource exploitation are adjusted to risk level, vary with risk during different components of foraging, and (co)vary among individuals. We quantified foraging behaviour and resource exploitation for 21 common voles (Microtus arvalis). By manipulating ground cover, we created simple landscapes of two food patches varying in perceived risk during feeding in a patch and/or while travelling between patches. Foraging of individuals was variable and adjusted to risk level and type. High risk during feeding reduced feeding duration and food consumption more strongly than risk while travelling. Risk during travelling modified the risk effects of feeding for changes between patches and resulting evenness of resource exploitation. Across risk conditions individuals differed consistently in when and how long they exploited resources and exposed themselves to risk. These among-individual differences in foraging behaviour were associated with consistent patterns of resource exploitation. Thus, different strategies in foraging-under-risk ultimately lead to unequal payoffs and might affect lower trophic levels in food webs. Inter-individual differences in foraging behaviour, i.e. foraging personalities, are an integral part of foraging behaviour and need to be fully integrated into optimal foraging theory. |
format |
Article in Journal/Newspaper |
author |
Eccard, Jana A. (Prof. Dr.) Liesenjohann, Thilo Dammhahn, Melanie |
author_facet |
Eccard, Jana A. (Prof. Dr.) Liesenjohann, Thilo Dammhahn, Melanie |
author_sort |
Eccard, Jana A. (Prof. Dr.) |
title |
Among-individual differences in foraging modulate resource exploitation under perceived predation risk |
title_short |
Among-individual differences in foraging modulate resource exploitation under perceived predation risk |
title_full |
Among-individual differences in foraging modulate resource exploitation under perceived predation risk |
title_fullStr |
Among-individual differences in foraging modulate resource exploitation under perceived predation risk |
title_full_unstemmed |
Among-individual differences in foraging modulate resource exploitation under perceived predation risk |
title_sort |
among-individual differences in foraging modulate resource exploitation under perceived predation risk |
publishDate |
2020 |
url |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/57613 https://doi.org/10.1007/s00442-020-04773-y |
genre |
Microtus arvalis |
genre_facet |
Microtus arvalis |
op_relation |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/57613 https://doi.org/10.1007/s00442-020-04773-y |
op_rights |
https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/closedAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00442-020-04773-y |
container_title |
Oecologia |
container_volume |
194 |
container_issue |
4 |
container_start_page |
621 |
op_container_end_page |
634 |
_version_ |
1766069400832573440 |