Modeling the functional link between movement, feeding activity, and condition in a marine predator

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dc.contributor.authorPirotta, Enrico
dc.contributor.authorSchwarz, Lisa K.
dc.contributor.authorCosta, Daniel P.
dc.contributor.authorRobinson, Patrick W.
dc.contributor.authorNew, Leslie
dc.contributor.funderOffice of Naval Researchen
dc.contributor.funderInternational Association of Oil and Gas Producersen
dc.contributor.funderAlfred P. Sloan Foundationen
dc.contributor.funderGordon and Betty Moore Foundationen
dc.contributor.funderDavid and Lucile Packard Foundationen
dc.date.accessioned2019-05-07T09:11:05Z
dc.date.available2019-05-07T09:11:05Z
dc.date.issued2018-12-27
dc.date.updated2019-05-03T11:53:51Z
dc.description.abstractThe ability to quantify animals’ feeding activity and the resulting changes in their body condition as they move in the environment is fundamental to our understanding of a population’s ecology. We use satellite tracking data from northern elephant seals (Mirounga angustirostris), paired with simultaneous diving information, to develop a Bayesian state-space model that concurrently estimates an individual’s location, feeding activity, and changes in condition. The model identifies important foraging areas and times, the relative amount of feeding occurring therein, and thus the different behavioral strategies in which the seals engage. The fitness implications of these strategies can be assessed by looking at the resulting variation in individuals’ condition, which in turn affects the condition and survival of their offspring. Therefore, our results shed light on the processes affecting an individual’s decision-making as it moves and feeds in the environment. In addition, we demonstrate how the model can be used to simulate realistic patterns of disturbance at different stages of the trip, and how the predicted accumulation of lipid reserves varies as a consequence. Particularly, disturbing an animal in periods of high feeding activity or shortly after leaving the colony was predicted to have the potential to lead to starvation. In contrast, an individual could compensate even for very severe disturbance if such disturbance occurred outside the main foraging grounds. Our modeling approach is applicable to marine mammal species that perform drift dives and can be extended to other species where an individual’s buoyancy can be inferred from its diving behavior.en
dc.description.sponsorshipOffice of Naval Research (N00014-00-1-0880; N00014-03-1-0651; N00014-08-1-1195; N00014-10-1-0356 and N00014-02-1-1012); International Association of Oil and Gas Producers (E & P Sound and Marine Life Joint Industry Project No. JIP 22 07-23); Alfred P. Sloan Foundation,Gordon and Betty Moore Foundation, David and Lucile Packard Foundation (Tagging of Pacific Predators Program)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationPirotta, E., Schwarz, L. K., Costa, D. P., Robinson, P. W. and New, L. (2018) 'Modeling the functional link between movement, feeding activity, and condition in a marine predator', Behavioral Ecology, 30(2), pp. 434-445. doi: 10.1093/beheco/ary183en
dc.identifier.doi10.1093/beheco/ary183en
dc.identifier.eissn1465-7279
dc.identifier.endpage445en
dc.identifier.issn1045-2249
dc.identifier.issued2en
dc.identifier.journaltitleBehavioral Ecologyen
dc.identifier.startpage434en
dc.identifier.urihttps://hdl.handle.net/10468/7855
dc.identifier.volume30en
dc.language.isoenen
dc.publisherOxford University Pressen
dc.relation.urihttps://doi.org/10.1093/beheco/ary183
dc.rights© 2019, Oxford University Press. This is a pre-copyedited, author-produced version of an article accepted for publication in Behavioral Ecology following peer review. The version of record [Pirotta, E., Schwarz, L. K., Costa, D. P., Robinson, P. W. and New, L. (2018) 'Modeling the functional link between movement, feeding activity, and condition in a marine predator', Behavioral Ecology, 30(2), pp. 434-445. doi: 10.1093/beheco/ary183] is available online at: https://doi.org/10.1093/beheco/ary183en
dc.subjectBody conditionen
dc.subjectDisturbanceen
dc.subjectDrift divesen
dc.subjectElephant sealsen
dc.subjectFeeding ecologyen
dc.subjectSatellite trackingen
dc.subjectBayesian state-space modellingen
dc.titleModeling the functional link between movement, feeding activity, and condition in a marine predatoren
dc.typeArticle (peer-reviewed)en
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