Prey encounters and spatial memory influence use of foraging patches in a marine central place forager

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dc.contributor.authorIorio-Merlo, Virginia
dc.contributor.authorGraham, Isla
dc.contributor.authorHewitt, Rebecca
dc.contributor.authorAarts, Geert
dc.contributor.authorPirotta, Enrico
dc.contributor.authorHastie, Gordon D.
dc.contributor.authorThompson, Paul
dc.contributor.funderMoray Offshore Renewables Ltd, Scotlanden
dc.contributor.funderBeatrice Offshore Windfarm Ltd, Scotlanden
dc.date.accessioned2022-03-14T16:24:48Z
dc.date.available2022-03-14T16:24:48Z
dc.date.issued2022-03-02
dc.description.abstractGiven the patchiness and long-term predictability of marine resources, memory of high-quality foraging grounds is expected to provide fitness advantages for central place foragers. However, it remains challenging to characterise how marine predators integrate memory with recent prey encounters to adjust fine-scale movement and use of foraging patches. Here, we used two months of movement data from harbour seals (Phoca vitulina) to quantify the repeatability in foraging patches as a proxy for memory. We then integrated these data into analyses of fine-scale movement and underwater behaviour to test how both spatial memory and prey encounter rates influenced the seals’ Area Restricted Search (ARS) behaviour. Specifically, we used one month’s GPS data from 29 individuals to build spatial memory maps of searched areas, and archived accelerometery data from a subset of five individuals to detect prey catch attempts, a proxy for prey encounters. Individuals were highly consistent in the areas they visited over two consecutive month. Hidden Markov Models showed that both spatial memory and prey encounters increased the probability of seals initiating ARS. These results provide evidence that predators use memory to adjust their fine scale movement and this ability should be accounted for in movement models.en
dc.description.sponsorshipBeatrice Offshore Windfarm Ltd, Scotland and Moray Offshore Renewables Ltd, Scotland (Moray Firth Marine Mammal Monitoring Programme)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid20212261en
dc.identifier.citationIorio-Merlo, V., Graham, I., Hewitt, R., Aarts, G., Pirotta, E., Hastie, G. D. and Thompson, P. (2022) 'Prey encounters and spatial memory influence use of foraging patches in a marine central place forager', Proceedings of the Royal Society B, 289, 20212261 (10pp). doi: 10.1098/rspb.2021.2261en
dc.identifier.doi10.1098/rspb.2021.2261en
dc.identifier.eissn1471-2954
dc.identifier.endpage10en
dc.identifier.issn0962-8452
dc.identifier.journaltitleProceedings of the Royal Society B: Biological Sciencesen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/12928
dc.identifier.volume289en
dc.language.isoenen
dc.publisherThe Royal Societyen
dc.relation.urihttps://doi.org/10.5061/dryad.6q573n601
dc.relation.urihttps://github.com/virginiaIorio/Drivers-of-seal-ARS-behaviour
dc.rights© 2022, the Authors. Published by the Royal Society. This Accepted Manuscript is made available under a CC BY license.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectARSen
dc.subjectSpatial memoryen
dc.subjectHidden Markov modelen
dc.subjectAccelerometeren
dc.subjectHarbor sealsen
dc.subjectRepeatabilityen
dc.titlePrey encounters and spatial memory influence use of foraging patches in a marine central place forageren
dc.typeArticle (peer-reviewed)en
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