Cool birds: first evidence of energy-saving nocturnal torpor in free-living common swifts Apus apus resting in their nests

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378050%3A_____%2F22%3A00557630" target="_blank" >RIV/68378050:_____/22:00557630 - isvavai.cz</a>
Result on the web
<a href="https://royalsocietypublishing.org/doi/10.1098/rsbl.2021.0675" target="_blank" >https://royalsocietypublishing.org/doi/10.1098/rsbl.2021.0675</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1098/rsbl.2021.0675" target="_blank" >10.1098/rsbl.2021.0675</a>

Result language
angličtina
Original language name
Cool birds: first evidence of energy-saving nocturnal torpor in free-living common swifts Apus apus resting in their nests
Original language description
Daily torpor is a means of saving energy by controlled lowering of the metabolic rate (MR) during resting, usually coupled with a decrease in body temperature. We studied nocturnal daily torpor under natural conditions in free-living common swifts Apus apus resting in their nests as a family using two non-invasive approaches. First, we monitored nest temperature (T-nest) in up to 50 occupied nests per breeding season in 2010-2015. Drops in T-nest were the first indication of torpor. Among 16 673 observations, we detected 423 events of substantial drops in T-nest of on average 8.6 degrees C. Second, we measured MR of the families inside nest-boxes prepared for calorimetric measurements during cold periods in the breeding seasons of 2017 and 2018. We measured oxygen consumption and carbon dioxide production using a mobile indirect respirometer and calculated the percentage reduction in MR. During six torpor events observed, MR was gradually reduced by on average 56% from the reference value followed by a decrease in T-nest of on average 7.6 degrees C. By contrast, MR only decreased by about 33% on nights without torpor. Our field data gave an indication of daily torpor, which is used as a strategy for energy saving in free-living common swifts.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10601 - Cell biology

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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