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Publikationstyp: Zeitschriftenaufsatz
Dokumenttyp: Originalarbeit

Jahr: 2017

AutorInnen: Bieber, C; Cornils, JS; Hoelzl, F; Giroud, S; Ruf, T

Titel: The costs of locomotor activity? Maximum body temperatures and the use of torpor during the active season in edible dormice.

Quelle: J Comp Physiol B. 2017; 187(5-6):803-814



Autor/innen der Vetmeduni Vienna:

Bieber Claudia
Cornils Jessica Svea
Giroud Sylvain
Hölzl Franz
Ruf Thomas

Beteiligte Vetmed-Organisationseinheiten
Forschungsinstitut für Wildtierkunde und Ökologie


Zugehörige(s) Projekt(e): Prädationsrisiko, Stress und Life-History-Taktiken des Siebenschläfers


Abstract:
Measuring T b during the active season can provide information about the timing of reproduction and the use of short bouts of torpor and may be used as a proxy for the locomotor activity of animals (i.e., maximum T b). This kind of information is especially important to understand life-history strategies and energetic costs and demands in hibernating mammals. We investigated T b throughout the active season in edible dormice (Glis glis), since they (i) have an expensive arboreal life-style, (ii) are known to show short bouts of torpor, and (iii) are adapted to pulsed resources (mast of beech trees). We show here for the first time that maximum T b's in free-living active dormice (during the night) increase regularly and for up to 8 h above 40 °C, which corresponds to slight hyperthermia, probably due to locomotor activity. The highest weekly mean maximum T b was recorded 1 week prior to hibernation (40.45 ± 0.07 °C). At the beginning of the active season and immediately prior to hibernation, the mean maximum T b's were lower. The time dormice spent at T b above 40 °C varied between sexes, depending on mast conditions. The date of parturition could be determined by a sudden increase in mean T b (plus 0.49 ± 0.04 °C). The occurrence of short torpor bouts (<24 h) was strongly affected by the mast situation with much higher torpor frequencies in mast-failure years. Our data suggest that locomotor activity is strongly affected by environmental conditions, and that sexes respond differently to these changes.

Keywords Pubmed: Animals
Body Temperaturephysiology
Female
Locomotionphysiology
Male
Myoxidaephysiology
Reproduction
Seasons
Torporphysiology

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