2023
DOI: 10.22541/au.167966829.96207455/v2
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Thermoregulatory strategies of songbird nestlings reveal limited capacity for cooling and high risk of dehydration

Abstract: Developing young are particularly sensitive to environmental challenges, often with life-long consequences, but the risks of climate warming during this period are not well understood. To quantify the physiological effects of increasing temperatures for developing endotherms, we measured metabolic rate, water loss, and heat dissipation behaviours between 25-45°C in nestlings of a free-living songbird. The thermoneutral zone ranged from 33.1–42.3°C – higher and narrower than adults – and metabolic rate increase… Show more

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