Show simple item record

dc.contributor.authorEastick, Danielle
dc.contributor.authorTattersall, Glenn
dc.contributor.authorWatson, Simon
dc.contributor.authorLesku, John
dc.contributor.authorRobert, Kylie
dc.date.accessioned2019-03-01T17:19:48Z
dc.date.available2019-03-01T17:19:48Z
dc.date.issued2019-02-13
dc.identifier.citationScientific Reports 9: 1966en_US
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/10464/13983
dc.description.abstractMany ideas have been put forward for the adaptive value of the cassowary casque; and yet, its purpose remains speculative. Homeothermic animals elevate body temperature through metabolic heat production. Heat gain must be offset by heat loss to maintain internal temperatures within a range for optimal performance. Living in a tropical climate, cassowaries, being large bodied, dark feathered birds, are under thermal pressure to offload heat. We tested the original hypothesis that the casque acts as a thermal window. With infrared thermographic analyses of living cassowaries over an expansive range of ambient temperatures, we provide evidence that the casque acts as a thermal radiator, offloading heat at high temperatures and restricting heat loss at low temperatures. Interestingly, at intermediate temperatures, the casque appears thermally heterogeneous, with the posterior of the casque heating up before the front half. These findings might have implications for the function of similar structures in avian and non-avian dinosaurs.en_US
dc.language.isoenen_US
dc.publisherNature Publishing Groupen_US
dc.titleCassowary casques act as thermal windowsen_US
dc.typeArticleen_US
dc.identifier.doi10.1038/s41598-019-38780-8
refterms.dateFOA2021-08-14T01:39:06Z


Files in this item

Thumbnail
Name:
Eastick et al. 2019 Scientific ...
Size:
1.737Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record