Phenotypic Flexibility of Metabolic Rate and Evaporative Water Loss Does Not Vary Across a Climatic Gradient in an Afrotropical Passerine Bird

April 23, 2020 | Biology

Fresh from the Journal of Experimental Biology (JEB), here is an interesting Bio article that Lab.Equipment has sourced for you:

Matthew J. Noakes and Andrew E. McKechnie

Small birds inhabiting northern temperate and boreal latitudes typically increase metabolic rates during cold winters or acclimation to low air temperatures (Taccl). Recent studies suggest considerable variation in patterns of seasonal metabolic acclimatization in birds from subtropical and tropical regions with milder winters, but there remains a dearth of acclimation studies investigating metabolic flexibility among lower-latitude birds. We used short-term thermal acclimation experiments to investigate phenotypic flexibility in basal metabolic rate (BMR), thermoneutral evaporative water loss (EWL) and summit metabolism (Msum) in three populations of white-browed sparrow-weavers (Plocepasser mahali) along a climatic and aridity gradient. We allocated individuals to one of three Taccl treatments (5, 20 and 35°C; n=11 per population per Taccl)... You can find the full article in the Journal of Experimental Biology (JEB) Blog.

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