PMID: 9548656Apr 21, 1998Paper

Development of thermoregulation and posthatching growth in the altricial cockatiel Nymphicus hollandicus

Physiological Zoology
J T Pearson

Abstract

The development of thermoregulation and growth during the nestling period of cockatiel Nymphicus hollandicus were examined in this study. It was hypothesised that, in comparison to other altricial species of similar body mass, cockatiel chicks develop endothermy earlier and consequently have less energy available for growth, resulting in reduced growth rates. While poorly insulated and blind at hatching, cockatiel developed endothermic responses in their first week, and were individually effectively homeothermic (with 75% of adult ability to maintain body temperature during exposure to 20 degrees-25 degrees C), by maintaining high metabolic rates (at all ambient temperatures tested) above the predicted resting rates of an adult of similar body mass before parental brooding ceased (12-13 d). Mass-independent metabolic rates were equivalent to those of fledglings at only 20% of the nestling period (37 d), well before adequate insulation was obtained. The Gompertz growth constants of cockatiel were significantly lower than those of other altricial land birds, which supports the hypothesis of this study.

Citations

Jan 25, 2005·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·T Pis, D Luśnia
Jun 14, 2014·Science·John M GradyFelisa A Smith
Dec 26, 2001·The Journal of Experimental Zoology·M H Schweitzer, C L Marshall
Nov 18, 2016·Royal Society Open Science·Wolfgang GoymannIngrid Schwabl
Nov 10, 2017·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Edwin R Price, Edward M Dzialowski
May 21, 2020·Proceedings. Biological Sciences·Jose C Noguera, Alberto Velando
Jan 16, 2010·Journal of Evolutionary Biology·E BolundW Forstmeier
Mar 16, 2013·Journal of Evolutionary Biology·G E García-PeñaT Székely
May 21, 2020·Royal Society Open Science·Simone VincenziAlain J Crivelli
Aug 2, 2014·The Journal of Animal Ecology·Samantha E RichmanScott R McWilliams
May 6, 2015·Ecology and Evolution·Anders Pape MøllerIsmael Galván
Aug 8, 2015·Zoological Science·Jongmin YoonShi-Ryong Park
Sep 15, 2016·Physical Review. E·Scott A Lee
Jul 13, 2017·Evolution; International Journal of Organic Evolution·Nicholas R FriedmanVladimír Remeš
Feb 22, 2000·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·J T Pearson, H Tazawa

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