Show simple item record

dc.contributor.authorTomlinson, Sean
dc.contributor.authorMathialagan, P.
dc.contributor.authorMaloney, S.
dc.date.accessioned2017-04-28T13:59:53Z
dc.date.available2017-04-28T13:59:53Z
dc.date.created2017-04-28T09:06:05Z
dc.date.issued2014
dc.identifier.citationTomlinson, S. and Mathialagan, P. and Maloney, S. 2014. Special K: Testing the potassium link between radioactive rubidium (<sup>86</sup>Rb) turnover and metabolic rate. Journal of Experimental Biology. 217 (7): pp. 1040-1045.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/52775
dc.identifier.doi10.1242/jeb.096222
dc.description.abstract

© 2014. Published by the Company of Biologists Ltd.The measurement of 86Rb turnover recently has been suggested as a useful method for measuring field metabolic rate in small animals. We investigated a proposed mechanism of 86Rb turnover, its analogy to K+, by comparing the turnover of 86Rb in a model insect, the rhinoceros beetle Xylotrupes gideon, fed a diet of plum jam or plum jam enriched with K+ or Rb+. The turnover of 86Rb in the beetles on the K+ and the Rb+ diets was higher than that for beetles on the jam diet (F2,311=32.4; P=1.58×10-13). We also exposed the beetles to different ambient temperatures to induce differences in metabolic rate (VCO2) while feeding them the jam and K+ diets. VCO2 was higher at higher ambient temperature (Ta) for both jam (F1,11=14.56; P=0.003) and K+ (F1,8=15.39; P=0.004) dietary groups, and the turnover of 86Rb was higher at higher Tafor both jam (F1,11=10.80; P=0.007) and K+ (F1,8=12.34; P=0.008) dietary groups. There was a significant relationship between 86Rb turnover and VCO2 for both the jam (F1,11=35.00; P=1.0×10-3) and the K+ (F1,8=64.33; P=4.3×10-5) diets, but the relationship differed between the diets (F1,19=14.07; P=0.001), with a higher 86Rb turnover in beetles on the K+-enriched than on the jam diet at all Ta. We conclude that 86Rb turnover is related to K+ metabolism, and that this is the mechanism of the relationship between 86Rb turnover and VCO2. Studies relating 86Rb turnover to VCO2 should maintain dietary [K+] as close as possible to that of natural diets for the most accurate calibrations for free-ranging animals.

dc.publisherThe Company of Biologists Ltd.
dc.titleSpecial K: Testing the potassium link between radioactive rubidium (<sup>86</sup>Rb) turnover and metabolic rate
dc.typeJournal Article
dcterms.source.volume217
dcterms.source.number7
dcterms.source.startPage1040
dcterms.source.endPage1045
dcterms.source.issn0022-0949
dcterms.source.titleJournal of Experimental Biology
curtin.departmentDepartment of Environment and Agriculture
curtin.accessStatusOpen access via publisher


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record