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Effects of within-generation thermal history on the flight performance of Ceratitis capitata : colder is better

dc.contributor.authorEsterhuizen, Nanikeen_ZA
dc.contributor.authorClusella-Trullas, Susanaen_ZA
dc.contributor.authorVan Daalen, Corne E.en_ZA
dc.contributor.authorSchoombie, Ruben E.en_ZA
dc.contributor.authorBoardman, Leighen_ZA
dc.contributor.authorTerblanche, John S.en_ZA
dc.date.accessioned2016-10-07T09:19:25Z
dc.date.available2016-10-07T09:19:25Z
dc.date.issued2014-07
dc.identifier.citationEsterhuizen, N. et al. 2014. Effects of within-generation thermal history on the flight performance of Ceratitis capitata : colder is better. Journal of Experimental Biology,217:3545-3556, doi:10.1242/jeb.106526.
dc.identifier.issn1477-9145 (online)
dc.identifier.issn0022-0949 (print)
dc.identifier.otherdoi:10.1242/jeb.106526
dc.identifier.urihttp://hdl.handle.net/10019.1/99708
dc.descriptionCITATION: Esterhuizen, N. et al. 2014. Effects of within-generation thermal history on the flight performance of Ceratitis capitata : colder is better. Journal of Experimental Biology,217:3545-3556, doi:10.1242/jeb.106526.
dc.descriptionThe original publication is available at http://jeb.biologists.org
dc.description.abstractThe influence of thermal history on temperature-dependent flight performance was investigated in an invasive agricultural pest insect, Ceratitis capitata (Diptera: Tephritidae). Flies were exposed to one of four developmental acclimation temperatures (Tacc: 15, 20, 25, 30°C) during their pupal stage and tested at these temperatures (Ttest) as adults using a full-factorial study design. Major factors influencing flight performance included sex, body mass, Ttest and the interaction between Ttest and Tacc. Successful flight performance increased with increasing Ttest across all acclimation groups (from 10% at 15°C to 77% at 30°C). Although Tacc did not affect flight performance independently, it did have a significant interaction effect with Ttest. Multiple comparisons showed that flies which had been acclimated to 15°C and 20°C performed better than those acclimated to 25°C and 30°C when tested at cold temperatures, but warm-acclimated flies did not outperform cold-acclimated flies at warmer temperatures. This provides partial support for the ‘colder is better’ hypothesis. To explain these results, several flight-related traits were examined to determine whether Tacc influenced flight performance as a consequence of changes in body or wing morphology, whole-animal metabolic rate or cytochrome c oxidase enzyme activity. Although significant effects of Tacc could be detected in several of the traits examined, with an emphasis on sex-related differences, increased flight performance could not be explained solely on the basis of changes in any of these traits. Overall, these results are important for understanding dispersal physiology despite the fact that the mechanisms of acclimation-related changes in flight performance remain unresolved.en_ZA
dc.description.urihttp://jeb.biologists.org/content/217/19/3545
dc.format.extent12 pages : illustrationsen_ZA
dc.language.isoen_ZAen_ZA
dc.publisherThe Company of Biologists
dc.subjectBeneficial acclimation hypothesisen_ZA
dc.subjectPhenotypic plasticityen_ZA
dc.subjectMediterranean fruit flyen_ZA
dc.subjectDevelopmental variationen_ZA
dc.titleEffects of within-generation thermal history on the flight performance of Ceratitis capitata : colder is betteren_ZA
dc.typeArticleen_ZA
dc.description.versionPublisher's version
dc.rights.holderThe Company of Biologists


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