Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/16178
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dc.contributor.authorLillywhite, Harvey Ben
dc.contributor.authorHeatwole, Harolden
dc.contributor.authorSheehy, Coleman Men
dc.date.accessioned2014-12-02T11:45:00Z
dc.date.issued2014en
dc.identifier.citationPhysiological and Biochemical Zoology, 87(1), p. 46-55en
dc.identifier.issn1522-2152en
dc.identifier.issn1537-5293en
dc.identifier.urihttps://hdl.handle.net/1959.11/16178en
dc.description.abstractDehydration and drinking behaviors were investigated in the little file snake ('Acrochordus granulatus') collected from marine populations in the Philippines and in Australia. File snakes dehydrate in seawater and do not drink seawater when dehydrated in air and offered seawater to drink. Dehydrated file snakes drink freshwater, and the threshold of dehydration for first drinking response is a deficit of [Formula: see text] (mean ± SD) of original body mass. The thirst mechanism in this species is more sensitive than that recently studied in sea snakes. The volume of water ingested increases with increasing dehydration. Mean plasma osmolality was 278.89 ± 33.17 mMol/kg, mean hematocrit was 59% ± 5.45%, and both decreased in snakes that drank freshwater following acclimation in seawater. Snakes always drank freshwater at the water's surface, testing water with tongue flicks between each swallowing of water. Some snakes ingested large volumes of freshwater, approaching 50% of body mass. Visual observations and measurements of osmolality in plasma and stomach fluids suggest that water is taken up from the gut and dilutes body fluids slowly over the course of 48 h or longer. Eighty percent of snakes that were collected during the dry season (following >4 mo of drought) in Australia drank freshwater immediately following their capture, indicating that snakes were dehydrated in their marine environment even when known to have been feeding at the time. Snakes kept in seawater maintained a higher state of body condition when fresh water was periodically available. These results support a growing conclusion that diverse taxa of marine snakes require environmental sources of freshwater to maintain water balance, contrary to earlier belief. Identifying the freshwater requirements of secondarily marine vertebrates is important for better understanding how they maintain water balance in marine habitats, especially with respect to conservation in changing environments.en
dc.languageenen
dc.publisherUniversity of Chicago Pressen
dc.relation.ispartofPhysiological and Biochemical Zoologyen
dc.titleDehydration and Drinking Behavior of the Marine File Snake, 'Acrochordus granulatus'en
dc.typeJournal Articleen
dc.identifier.doi10.1086/673375en
dc.subject.keywordsComparative Physiologyen
local.contributor.firstnameHarvey Ben
local.contributor.firstnameHarolden
local.contributor.firstnameColeman Men
local.subject.for2008060604 Comparative Physiologyen
local.subject.seo2008970106 Expanding Knowledge in the Biological Sciencesen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailhheatwo2@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20140210-031412en
local.publisher.placeUnited States of Americaen
local.format.startpage46en
local.format.endpage55en
local.peerreviewedYesen
local.identifier.volume87en
local.identifier.issue1en
local.contributor.lastnameLillywhiteen
local.contributor.lastnameHeatwoleen
local.contributor.lastnameSheehyen
dc.identifier.staffune-id:hheatwo2en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:16415en
local.identifier.handlehttps://hdl.handle.net/1959.11/16178en
dc.identifier.academiclevelAcademicen
local.title.maintitleDehydration and Drinking Behavior of the Marine File Snake, 'Acrochordus granulatus'en
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.description.statisticsepubsVisitors: 163<br />Views: 162<br />Downloads: 0en
local.search.authorLillywhite, Harvey Ben
local.search.authorHeatwole, Harolden
local.search.authorSheehy, Coleman Men
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