Show simple item record

dc.contributor.authorNarayan, Edward
dc.contributor.authorCockrem, John
dc.contributor.authorHero, Jean-Marc
dc.date.accessioned2017-05-03T15:44:15Z
dc.date.available2017-05-03T15:44:15Z
dc.date.issued2012
dc.date.modified2013-03-26T22:37:48Z
dc.identifier.issn00166480
dc.identifier.doi10.1016/j.ygcen.2012.02.007
dc.identifier.urihttp://hdl.handle.net/10072/49913
dc.description.abstractStudies of baseline (unstressed) and short-term corticosterone stress responses in free-living amphibians can provide crucial information on the physiological responses of different populations to environmental change. In this study, we compared baseline and urinary corticosterone metabolite responses of freeliving adult males and females of two closely related Fijian frogs of the Platymantis genus (Family: Ceratobatrachidae). Fijian ground frogs (Platymantis vitiana) live on the ground while Fijian tree frogs (Platymantis vitiensis) are arboreal. We captured free living frogs and applied our moderate stress protocol (5 min handling during urine sampling at hourly intervals), with urinary corticosterone metabolite concentrations measured by enzyme-immunoassay. Mean urinary corticosterone metabolite concentrations in male and female Fijian ground frogs increased from 0 to 2 h andcontinued to increase to peak concentrations 5-6 h after capture. Mean baseline corticosterone concentration was significantly different between sexes (higher in males than females) only for Fijian ground frogs. There was no significant difference between sexes in the integrated corticosterone responses for both species. Mean baseline and urinary corticosterone metabolite responses of Fijian tree frogs were lower than those of Fijian ground frogs. Corticosterone levels increased for 4-5 h in both species and began to decrease again 7 h after initial capture. Corticosterone responses were consistently higher for Fijian ground frogs than Fijian tree frogs. Individuals in both species showed markedly variable corticosterone responses over the 8 h duration of the stressor, with some individuals showing low stress responses and others showing high stress responses. The magnitude of the corrected integrated response of the ground frogs was almost twice that of the tree frogs. These differences in baseline and short-term corticosterone stress responses between these two species could be a consequence of ecological differences including micro-habitat, predator interactions and/or competitive interactions with the introduced cane toad (Rhinella marina). Comparisons of corticosterone responses between populations and species provide a valuable tool for measuring the physiological responses of the amphibians to environmental change.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeUnited States
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom55
dc.relation.ispartofpageto61
dc.relation.ispartofissue1
dc.relation.ispartofjournalGeneral and Comparative Endocrinology
dc.relation.ispartofvolume177
dc.rights.retentionY
dc.subject.fieldofresearchAnimal Physiological Ecology
dc.subject.fieldofresearchAnimal Neurobiology
dc.subject.fieldofresearchTerrestrial Ecology
dc.subject.fieldofresearchPhysiology
dc.subject.fieldofresearchZoology
dc.subject.fieldofresearchVeterinary Sciences
dc.subject.fieldofresearchcode060806
dc.subject.fieldofresearchcode060805
dc.subject.fieldofresearchcode060208
dc.subject.fieldofresearchcode0606
dc.subject.fieldofresearchcode0608
dc.subject.fieldofresearchcode0707
dc.titleUrinary corticosterone metabolite responses to capture and handling in two closely related species of free-living Fijian frogs
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.date.issued2012
gro.hasfulltextNo Full Text
gro.griffith.authorHero, Jean-Marc
gro.griffith.authorNarayan, Edward J.
gro.griffith.authorCockrem, John


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record