Temporal pattern of foraging and microhabitat use by Galápagos marine iguanas, Amblyrhynchus cristatus

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dc.contributor.author Dawson, William R. en_US
dc.contributor.author Buttemer, William A. en_US
dc.date.accessioned 2006-09-11T19:24:26Z
dc.date.available 2006-09-11T19:24:26Z
dc.date.issued 1993-10 en_US
dc.identifier.citation Buttemer, William A.; Dawson, William R.; (1993). "Temporal pattern of foraging and microhabitat use by Galápagos marine iguanas, Amblyrhynchus cristatus ." Oecologia 96(1): 56-64. <http://hdl.handle.net/2027.42/47800> en_US
dc.identifier.issn 0029-8549 en_US
dc.identifier.issn 1432-1939 en_US
dc.identifier.uri http://hdl.handle.net/2027.42/47800
dc.description.abstract We observed a colony of marine iguanas ( Amblyrhynchus cristatus ) on Isla Fernandina, Galápagos, Ecuador, while measuring local micrometeorological and tidal conditions. We found size-related differences in foraging mode, with smaller iguanas feeding intertidally during daytime low tides and larger iguanas feeding subtidally. Despite having greater opportunity, subtidal foragers did not time their foraging bouts or exploit their environment in ways that optimized their period at high body temperature. Instead, the foraging schedule of these iguanas served to maximize their rate of rewarming following emergence from the cool sea. Intertidal feeders, by contrast, showed much greater behavioral flexibility in attempting to exploit their thermal environment. We suggest that size-ordered differences in marine iguana thermoregulatory behavior reflect underlying ontogenetic changes in costs and benefits of thermoregulation due to differences in predator pressure, quantity of food and electrolytes taken at each feeding, mode of foraging, and agonistic tendencies. en_US
dc.format.extent 1106592 bytes
dc.format.extent 3115 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.language.iso en_US
dc.publisher Springer-Verlag en_US
dc.subject.other Life Sciences en_US
dc.subject.other Thermoregulation en_US
dc.subject.other Marine Iguanas en_US
dc.subject.other Micrometeorology en_US
dc.subject.other Foraging en_US
dc.subject.other Ecology en_US
dc.subject.other Plant Sciences en_US
dc.subject.other Operative Temperature en_US
dc.title Temporal pattern of foraging and microhabitat use by Galápagos marine iguanas, Amblyrhynchus cristatus en_US
dc.type Original Papers en_US
dc.subject.hlbsecondlevel Natural Resources and Environment en_US
dc.subject.hlbsecondlevel Molecular, Cellular and Developmental Biology en_US
dc.subject.hlbsecondlevel Ecology and Evolutionary Biology en_US
dc.subject.hlbtoplevel Health Sciences en_US
dc.subject.hlbtoplevel Science en_US
dc.description.peerreviewed Peer Reviewed en_US
dc.contributor.affiliationum Department of Biology, Museum of Zoology, University of Michigan, 48109, Ann Arbor, MI, USA; Department of Biological Sciences, University of Wollongong, 2500, Wollongong, NSW, Australia en_US
dc.contributor.affiliationum Department of Biology, Museum of Zoology, University of Michigan, 48109, Ann Arbor, MI, USA en_US
dc.contributor.affiliationumcampus Ann Arbor en_US
dc.description.bitstreamurl http://deepblue.lib.umich.edu/bitstream/2027.42/47800/1/442_2004_Article_BF00318031.pdf en_US
dc.identifier.doi http://dx.doi.org/10.1007/BF00318031 en_US
dc.identifier.source Oecologia en_US
dc.owningcollname Interdisciplinary and Peer-Reviewed
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