Show simple item record

dc.contributor.authorTomlinson, Sean
dc.date.accessioned2022-01-11T02:28:40Z
dc.date.available2022-01-11T02:28:40Z
dc.date.issued2019
dc.identifier.citationTomlinson, S. 2019. The mathematics of thermal sub-optimality: Nonlinear regression characterization of thermal performance of reptile metabolic rates. Journal of Thermal Biology. 81: pp. 49-58.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/87245
dc.identifier.doi10.1016/j.jtherbio.2019.02.008
dc.description.abstract

Although several approaches have been suggested, there is no broadly accepted single approach for quantitative characterization of thermal performance in ectotherms. I sought to identify the most appropriate non-linear function with which to represent thermal performance of ectothermic metabolic rate, and to interrogate the biological relevance of the thermal parameters of this function. I used published data for exercise-induced metabolic rates of eight species of reptile from a broad phylogenetic base and global distribution. Using an Akaike Information Criterion, I compared 12 different models proposed to characterize thermal performance adapted from a broad range of disciplines, finding that a beta-distribution model described the reptile metabolic rate data most parsimoniously. Using the beta-distribution model, unique functions were parameterized for each species. Four parameters were extracted from each species-specific fit: the temperature coincident with the peak of the thermal performance curve, T opt ; the point at which the function intersected the x-axis, CT max ; and two points indicative of thermal breadth, T d(lower) and T d(upper) . There was a positive relationship between the species’ preferred body temperatures (T pref ) reported in the scientific literature and both T opt and T d(lower) extracted from the species-specific beta functions. While T d(lower) estimates were not different to published T pref values, T opt estimates were statistically higher than T pref . This is consistent with previous observations that the point of peak performance does not match T pref . The predicted CT max also correlated well with published values. The model in its current form was not able to estimate CT min , and this parameter was not explored here, but should be in future research. By providing a quantitative description of the thermal performance, the beta-distribution function offers a new theoretical basis for thermal optimality. I contend that T pref aligns with the mathematical threshold T d(lower) , where metabolic rate is at its maximum prior to thermal inhibition.

dc.languageEnglish
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/IC150100041
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectScience & Technology
dc.subjectLife Sciences & Biomedicine
dc.subjectBiology
dc.subjectZoology
dc.subjectLife Sciences & Biomedicine - Other Topics
dc.subjectThermal performance
dc.subjectMetabolic rate
dc.subjectNon-linear regression
dc.subjectEctotherm
dc.subjectReptile
dc.subjectAgamidae
dc.subjectIguanidae
dc.subjectScincidae
dc.subjectEVAPORATIVE WATER-LOSS
dc.subjectANAEROBIC METABOLISM
dc.subjectSPRINT SPEED
dc.subjectTEMPERATURE
dc.subjectPHYSIOLOGY
dc.subjectEVOLUTION
dc.subjectSENSITIVITY
dc.subjectOXYGEN
dc.subjectMODEL
dc.subjectLIZARDS
dc.titleThe mathematics of thermal sub-optimality: Nonlinear regression characterization of thermal performance of reptile metabolic rates
dc.typeJournal Article
dcterms.source.volume81
dcterms.source.startPage49
dcterms.source.endPage58
dcterms.source.issn0306-4565
dcterms.source.titleJournal of Thermal Biology
dc.date.updated2022-01-11T02:28:39Z
curtin.departmentSchool of Molecular and Life Sciences (MLS)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidTomlinson, Sean [0000-0003-0864-5391]
dcterms.source.eissn1879-0992
curtin.contributor.scopusauthoridTomlinson, Sean [22036612300]


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

http://creativecommons.org/licenses/by-nc-nd/4.0/
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc-nd/4.0/