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dc.contributor.authorAshe, Erin
dc.contributor.authorWilliams, Rob
dc.contributor.authorMorton, Alexandra
dc.contributor.authorHammond, Philip S.
dc.identifier.citationAshe , E , Williams , R , Morton , A & Hammond , P S 2021 , ' Disentangling natural and anthropogenic forms of mortality and serious injury in a poorly studied pelagic dolphin ' , Frontiers in Marine Science , vol. 8 , 606876 .
dc.identifier.otherPURE: 274005576
dc.identifier.otherPURE UUID: 666e2e01-a2aa-4900-a978-55cf725ad1be
dc.identifier.otherBibtex: 10.3389/fmars.2021.606876
dc.identifier.otherORCID: /0000-0002-2381-8302/work/93161274
dc.identifier.otherScopus: 85105373242
dc.identifier.otherWOS: 000642803900004
dc.descriptionFunding for Oceans Initiative’s long-term research on Pacific white-sided dolphins has been provided from National Geographic, McLean and Marisla Foundations, and SeaDoc Society.en
dc.description.abstractKiller whale (Orcinus orca) populations specialize in both prey and prey acquisition tactics around the world and may be a primary evolutionary driver of the habits of small cetaceans. Entanglement in fishing gear is the most significant anthropogenic threat to the survival of cetaceans worldwide. Distinguishing between natural and human-caused sources of mortality and injury is a key task in marine mammal conservation and management. In British Columbia (BC), Canada, mammal-eating killer whales co-occur with Pacific white-sided dolphins (Lagenorhynchus obliquidens). Bycatch mortality rates are unknown here due to lack of systematic fisheries observer coverage. Drawing from more than three decades of first-hand observations of killer whale attacks on Pacific white-sided dolphins, we identify common themes with respect to predatory behavior of killer whales and anti-predatory responses of dolphins. With input from veterinary pathologists, we outline clues to distinguish killer whale rake marks from scars and wounds likely to be caused by fishery interactions. We examined photographs of 415 well-marked Pacific white-side dolphins for evidence of injuries and scars consistent with either killer whale attacks or fishery interactions. In this case study, healed scars from interactions with killer whale predators were ∼8× more common than scars from fishery interactions (3.9 vs. 0.5%), suggesting that predation is a much bigger threat to Pacific white-sided dolphins in the study area than anthropogenic impacts, or that dolphins are much less likely to survive a fishery interaction than a predation attempt. To advance our knowledge on poorly studied species, multiple lines of evidence will be needed.
dc.relation.ispartofFrontiers in Marine Scienceen
dc.rightsCopyright © 2021 Ashe, Williams, Morton and Hammond. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. these terms.en
dc.subjectData deficienten
dc.subjectKiller whaleen
dc.subjectGC Oceanographyen
dc.subjectQH301 Biologyen
dc.subjectSDG 3 - Good Health and Well-beingen
dc.subjectSDG 14 - Life Below Wateren
dc.titleDisentangling natural and anthropogenic forms of mortality and serious injury in a poorly studied pelagic dolphinen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.contributor.institutionUniversity of St Andrews. Sea Mammal Research Uniten
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews. Centre for Research into Ecological & Environmental Modellingen
dc.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.description.statusPeer revieweden

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