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- W2034182805 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 358:289-294 (2008) - DOI: https://doi.org/10.3354/meps07346 Danger on the rise: diurnal tidal state mediates an exchange of food for safety by the bar-bellied sea snake Hydrophis elegans Megan R. Kerford1, Aaron J. Wirsing2,*, Michael R. Heithaus2, Lawrence M. Dill1 1Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada 2Department of Biological Sciences, Marine Biology Program, Florida International University, Biscayne Bay Campus MSB, 3000 NE 151 Street, North Miami, Florida 33181, USA *Corresponding author. Email: wirsinga@fiu.edu ABSTRACT: Prey vulnerability to predation can depend on abiotic conditions. Thus, prey individuals may adjust their investment in anti-predator defense according to changes in one or more abiotic factors. We explored this possibility in Shark Bay, Western Australia, where the bar-bellied sea snake Hydrophis elegans is under threat of predation by the tiger shark Galeocerdo cuvier, asking specifically whether the diurnal tidal state influenced snakes’ selection of exposed foraging habitat (sand flat) and refuge habitat (seagrass). At high tide, when both habitats were easily accessible to sharks, H. elegans selected seagrass habitats, where its food is relatively scarce. At low tide, when sharks had limited access to both habitats, H. elegans used the 2 habitats equally but foraged exclusively over sand flats. We concluded that H. elegans is sensitive to the danger of tiger shark predation and trades food for the safety of a refuge when diurnal tidal conditions in its foraging habitat expose it to sharks. Our results suggest that predation risk should be considered in studies of sea snake habitat use and that important variation in predator–prey interactions may be missed if relevant abiotic conditions are ignored. KEY WORDS: Abiotic factors · Foraging · Galeocerdo cuvier · Hydrophis elegans · Predation risk · Prey vulnerability · Tiger shark Full text in pdf format PreviousNextCite this article as: Kerford MR, Wirsing AJ, Heithaus MR, Dill LM (2008) Danger on the rise: diurnal tidal state mediates an exchange of food for safety by the bar-bellied sea snake Hydrophis elegans. Mar Ecol Prog Ser 358:289-294. https://doi.org/10.3354/meps07346Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 358. Online publication date: April 21, 2008 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2008 Inter-Research." @default.
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- W2034182805 title "Danger on the rise: diurnal tidal state mediates an exchange of food for safety by the bar-bellied sea snake Hydrophis elegans" @default.
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