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Haemolymph osmolality and thermal hysteresis activity in 17 species of arthropods from sub-Antarctic Marion Island

dc.contributor.authorSinclair B.J.
dc.contributor.authorChown S.L.
dc.date.accessioned2011-05-15T16:00:20Z
dc.date.available2011-05-15T16:00:20Z
dc.date.issued2002
dc.identifier.citationPolar Biology
dc.identifier.citation25
dc.identifier.citation12
dc.identifier.issn7224060
dc.identifier.urihttp://hdl.handle.net/10019.1/11645
dc.description.abstractIn this paper, we present measurements of haemolymph osmolality for individuals from 17 species of arthropods on Marion Island, including a mite, a spider, Collembola, Psocoptera, Coleoptera, Diptera and Lepidoptera. This is the largest such survey for a Southern Hemisphere habitat. We also screened these species for thermal hysteresis activity, and show that the lepidopteran Embryonopsis halticella has a haemolymph thermal hysteresis agent that imparts approximately 0.2°C of thermal hysteresis. This low level leads us to conclude that, in this mild habitat, it may have a role in preventing nucleation, rather than directly acting to depress the freezing point of whole caterpillars. Haemolymph osmolalities were generally concordant with published values for the groups examined. With the exception of Isotomurus cd. palustris acclimated at 5 and 10°C, we found no statistical evidence of acclimation altering the haemolymph osmolality for any of the arthropods investigated.
dc.subjectarthropod
dc.subjectcold tolerance
dc.subjecthysteresis
dc.subjectIndian Ocean
dc.subjectAcari
dc.subjectAraneae
dc.subjectArthropoda
dc.subjectColeoptera
dc.subjectCollembola
dc.subjectDiptera
dc.subjectIsotomidae
dc.subjectIsotomurus
dc.subjectIsotomurus palustris
dc.subjectLepidoptera
dc.subjectPhacelia congesta
dc.subjectPsocoptera
dc.subjectYponomeutidae
dc.titleHaemolymph osmolality and thermal hysteresis activity in 17 species of arthropods from sub-Antarctic Marion Island
dc.typeArticle
dc.description.versionArticle


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