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- W2981387316 abstract "ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials ESR 40:357-367 (2019) - DOI: https://doi.org/10.3354/esr00999 ESR Special: Biologging in conservation Wanted dead or alive: characterizing likelihood of juvenile Steller sea lion predation from diving and space use patterns Amanda M. Bishop1,*, Alexandra K. Dubel2, Renae Sattler3, Casey L. Brown4, Markus Horning1 1Alaska SeaLife Center, Seward, AK 99664, USA 2Florida State University, Tallahassee, FL 32306, USA 3Alaska Department of Fish and Game, Palmer, AK 99645, USA 4Oregon Department of Fish and Wildlife, La Grande, OR 97850, USA *Corresponding author: amybi@alaskasealife.org ABSTRACT: Understanding linkages between behaviors and mortality risk is critical for managing populations. Juveniles constitute a particularly vulnerable life stage, with growing evidence that within stages, individual strategies may be associated with greater predation risk and mortality. These forms of predator-prey dynamics are rarely explored in marine environments due to difficulties in confirming vital status of individuals, and the lack of data sets that link mortality to behavior. We analyzed 2 concurrently collected data sets for juvenile Steller sea lions Eumetopias jubatus in the Gulf of Alaska to examine associations between mortality and specific behavioral patterns. Forty-five juvenile Steller sea lions were instrumented with external satellite tags and internally implanted vital rate transmitters (LHX tags). From 2005 through 2018, 25 juveniles remained alive and 20 died (18 confirmed predation). Using a binomial generalized linear mixed-effects model, we tested whether the probability of individual mortality was associated with seasonally specific dive patterns (time wet, dive depth) or horizontal movement patterns (home range size, average trip distance). Additionally, in 3 cases, external tags were transmitting until death. To examine links between fine-scale ante-mortem behavioral patterns and predation susceptibility, we compared dive patterns recorded during the last 3 d of data transmissions (both for animals which survived and for those which died) to dive patterns recorded during other periods at sea. Results suggest individuals that spent more time dry or dove shallower had a greater mortality probability, which could reflect foraging tactics of predators. This study highlights the effectiveness of combining multiple telemetry systems for exploring the vulnerability of individuals to the consumptive effects of predators. KEY WORDS: Predation · Bio-logging · Diving behavior · Eumetopias jubatus · Risk · Marine mammal Full text in pdf format Supplementary material PreviousNextCite this article as: Bishop AM, Dubel AK, Sattler R, Brown CL, Horning M (2019) Wanted dead or alive: characterizing likelihood of juvenile Steller sea lion predation from diving and space use patterns. Endang Species Res 40:357-367. https://doi.org/10.3354/esr00999 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in ESR Vol. 40. Online publication date: December 19, 2019 Print ISSN: 1863-5407; Online ISSN: 1613-4796 Copyright © 2019 Inter-Research." @default.
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