Critical thermal limits and their responses to acclimation in two sub-Antarctic spiders : Myro kerguelenensis and Prinerigone vagans

Simple item page
dc.contributor.authorJumbam, K. R.en_ZA
dc.contributor.authorTerblanche, J. S.en_ZA
dc.contributor.authorDeere, J. A.en_ZA
dc.contributor.authorSomers, M. J.en_ZA
dc.contributor.authorChown, Steven L.en_ZA
dc.date.accessioned2011-05-15T16:00:18Z
dc.date.available2011-05-15T16:00:18Z
dc.date.issued2008-01
dc.descriptionThe original publication is available at http://link.springer.com/journal/300en_ZA
dc.description.abstractDespite the relative richness of spider species across the Southern Ocean islands remarkably little information is available on their biology. Here, the critical thermal limits of an indigenous (Myro kerguelenensis, Desidae) and an introduced (Prinerigone vagans, Linyphiidae) spider species from Marion Island were studied after 7-8 days acclimation to 0, 5, 10 and 15°C. Critical thermal minima (CTMin) were low in these species by comparison with other spiders and insects measured to date, and ranged from -6 to -7°C in M. kerguelenensis and from -7 to -8°C in P. vagans. In contrast, critical thermal maxima (CTMax) were similar to other insects on Marion Island (M. kerguelenensis: 35.0-35.6°C; P. vagans: 35.1-36.0°C), although significantly lower than those reported for other spider species in the literature. The magnitude of acclimation responses in CTMax was lower than those in CTMin for both species and this suggests decoupled responses to acclimation. Whilst not conclusive, the results raise several important considerations: that oxygen limitation of thermal tolerance needs to be more widely investigated in terrestrial species, that indigenous and alien species might differ in the nature and extent of their plasticity, and that upper and lower thermal tolerance limits might be decoupled in spiders as is the case in insects. © 2007 Springer-Verlag.en_ZA
dc.description.versionPublishers' Versionen_ZA
dc.format.extentp. 215-220 : ill.
dc.identifier.citationJumbam, K. R. et al. 2008. Critical thermal limits and their responses to acclimation in two sub-Antarctic spiders : Myro kerguelenensis and Prinerigone vagans. Polar Biology, 31(2):215-220, dio:10.1007/s00300-007-0349-0.en_ZA
dc.identifier.issn1432-2056 (online)
dc.identifier.issn0722-4060 (print)
dc.identifier.otherdio:10.1007/s00300-007-0349-0
dc.identifier.urihttp://hdl.handle.net/10019.1/11630
dc.publisherSpringer-Verlagen_ZA
dc.rights.holderSpringer-Verlagen_ZA
dc.subjectTemperature toleranceen_ZA
dc.subjectMyro kerguelenensis -- Critical thermal limitsen_ZA
dc.subjectPrinerigone vagans -- Critical thermal limitsen_ZA
dc.subjectEcological climatologyen_ZA
dc.titleCritical thermal limits and their responses to acclimation in two sub-Antarctic spiders : Myro kerguelenensis and Prinerigone vagansen_ZA
dc.typeArticleen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
jumbam_critical_2008.pdf
Size:
311.48 KB
Format:
Adobe Portable Document Format
Description:
Publishers' Version
Download
Collections
Research Articles (Botany and Zoology)