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dc.contributor.authorArranz, Patricia
dc.contributor.authorBenoit-Bird, Kelly J.
dc.contributor.authorSouthall, Brandon L.
dc.contributor.authorCalambokidis, John
dc.contributor.authorFriedlaender, Ari S.
dc.contributor.authorTyack, Peter L.
dc.identifier.citationArranz , P , Benoit-Bird , K J , Southall , B L , Calambokidis , J , Friedlaender , A S & Tyack , P L 2018 , ' Risso's dolphins plan foraging dives ' , Journal of Experimental Biology , vol. 221 , no. 4 , 165209 .
dc.identifier.otherPURE: 257600777
dc.identifier.otherPURE UUID: e6c65d55-93b1-4719-8993-562f9ef90385
dc.identifier.otherScopus: 85060003890
dc.identifier.otherPubMed: 29491023
dc.identifier.otherWOS: 000426356800011
dc.identifier.otherORCID: /0000-0002-8409-4790/work/60887860
dc.descriptionFunding for the SOCAL-BRS project was provided by the Chief of Naval Operations Environmental Readiness Division, the U.S. Navy's Living Marine Resources Program, and the Office of Naval Research Marine Mammal Program. The Strategic Environmental Research and Development Program via a U.S. Army Corps of Engineers Contract (K.J.B. and B.L.S.) provided funding for data collection and prey analysis. This study was supported by the MASTS pooling initiative (Marine Alliance for Science and Technology for Scotland). MASTS is funded by the Scottish Funding Council (grant reference HR09011) and contributing institutions.en
dc.description.abstractHumans remember the past and use that information to plan future actions. Lab experiments that test memory for the location of food show that animals have a similar capability to act in anticipation of future needs, but less work has been done on animals foraging in the wild. We hypothesized that planning abilities are critical and common in breath-hold divers who adjust each dive to forage on prey varying in quality, location and predictability within constraints of limited oxygen availability. We equipped Risso's dolphins with sound-and-motion recording tags to reveal where they focus their attention through their externally observable echolocation and how they fine tune search strategies in response to expected and observed prey distribution. The information from the dolphins was integrated with synoptic prey data obtained from echosounders on an underwater vehicle. At the start of the dives, whales adjusted their echolocation inspection ranges in ways that suggest planning to forage at a particular depth. Once entering a productive prey layer, dolphins reduced their search range comparable to the scale of patches within the layer, suggesting that they were using echolocation to select prey within the patch. On ascent, their search range increased, indicating that they decided to stop foraging within that layer and started searching for prey in shallower layers. Information about prey, learned throughout the dive, was used to plan foraging in the next dive. Our results demonstrate that planning for future dives is modulated by spatial memory derived from multi-modal prey sampling (echoic, visual and capture) during earlier dives.
dc.relation.ispartofJournal of Experimental Biologyen
dc.rightsCopyright © 2018 The Author(s). Published by The Company of Biologists Ltd. his work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at:
dc.subjectPredator–prey dynamicsen
dc.subjectPerceptual rangeen
dc.subjectGrampus griseusen
dc.subjectAnimal decision makingen
dc.subjectEpisodic-like memoryen
dc.subjectForaging behaviouren
dc.subjectQH301 Biologyen
dc.subjectSH Aquaculture. Fisheries. Anglingen
dc.subjectAnimal Science and Zoologyen
dc.subjectAquatic Scienceen
dc.subjectEcology, Evolution, Behavior and Systematicsen
dc.subjectMolecular Biologyen
dc.titleRisso's dolphins plan foraging divesen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Centre for Social Learning & Cognitive Evolutionen
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews. Bioacoustics groupen
dc.contributor.institutionUniversity of St Andrews. Sound Tags Groupen
dc.contributor.institutionUniversity of St Andrews. Sea Mammal Research Uniten
dc.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.description.statusPeer revieweden

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