Global patterns of seasonal acclimatization in avian resting metabolic rates

Show simple item record McKechnie, Andrew E. Noakes, Matthew J. Smit, Ben 2016-02-25T06:14:02Z 2015-12
dc.description.abstract The adjustment of resting metabolic rates represents an important component of avian seasonal acclimatization, with recent studies revealing substantial differences between summer and winter in birds from a wide range of latitudes. We compared seasonal variation in basal metabolic rate (BMR) and summit metabolism (Msum) between temperate and tropical/subtropical latitudes, and examined correlations with latitude and temperature. The direction and magnitude of seasonal adjustments in BMR are broadly related to temperature and latitude, but are significantly more variable among tropical and subtropical species compared to those inhabiting temperate zones. Winter adjustments in BMR among subtropical species, when expressed relative to summer values, range from decreases of approximately 35 % to increases of more than 60 %, whereas the majority of temperate-zone species show increases in BMR during winter. Relatively few seasonal Msum data exist for tropical/subtropical species, but those that are available involve responses ranging from winter decreases to increases of similar magnitude to those characteristic of many temperate-zone species. Recent studies also highlight the substantial variation in seasonal adjustments that may occur within species, and reiterate the need for further investigations of the relative roles of environmental variables such as temperature and food availability as determinants of seasonal metabolic variation. en_ZA
dc.description.embargo 2016-12-30
dc.description.librarian hb2015 en_ZA
dc.description.uri en_ZA
dc.identifier.citation McKechnie, AE, Noakes, MJ & Smit, B 2015, 'Global patterns of seasonal acclimatization in avian resting metabolic rates', Journal of Ornithology, vol. 156, suppl. 1, pp. 367-376. en_ZA
dc.identifier.issn 2193-7192 (print)
dc.identifier.issn 2193-7206 (online)
dc.identifier.other 10.1007/s10336-015-1186-5
dc.language.iso en en_ZA
dc.publisher Springer en_ZA
dc.rights © Dt. Ornithologen-Gesellschaft e.V. 2015. The original publication is available at : http://link.springer.comjournal/10336. en_ZA
dc.subject Acclimatization en_ZA
dc.subject Latitude en_ZA
dc.subject Subtropics en_ZA
dc.subject Summit metabolism en_ZA
dc.subject Basal metabolic rate (BMR) en_ZA
dc.title Global patterns of seasonal acclimatization in avian resting metabolic rates en_ZA
dc.type Postprint Article en_ZA

Files in this item

This item appears in the following Collection(s)

Show simple item record