Results 71 to 80 of about 485 (157)

Inferring bird migration from bone isotopes and histology: A fossil‐friendly methodological framework

Methods in Ecology and Evolution, Volume 17, Issue 2, Page 531-553, February 2026.
Abstract Bird seasonal migration is a remarkable biogeographic phenomenon, yet its deep‐time origin(s) and evolutionary history remain poorly understood, with the bird fossil record largely overlooked. This study explores the predictability of bird migratory behaviour from the oxygen isotope composition of their bone apatite phosphate (δ18Op), a ...
Anaïs Duhamel, Aurore Canoville, Arnaud Vinçon‐Laugier, Julien Joseph, François Fourel, Christophe Lécuyer, Romain Amiot, Antoine Louchart   +7 more
wiley   +1 more source

Bats on a budget: torpor-assisted migration saves time and energy.

PLoS ONE, 2014
Bats and birds must balance time and energy budgets during migration. Migrating bats face similar physiological challenges to birds, but nocturnality creates special challenges for bats, such as a conflict between travelling and refueling, which many ...
Liam P McGuire, Kristin A Jonasson, Christopher G Guglielmo   +2 more
doaj   +1 more source

Mammal hibernation as a strategy for adaptation to unfavorable environmental conditions

Юг России: экология, развитие
To analyse the literature data on the survival pathways of heterothermic endotherms in unfavorable environmental conditions, during periods of low availability of food resources.The article provides data on the differences between daily and seasonal ...
A. K. Beibalaeva, Sh. I. Chalabov, N. K. Klichkhanov   +2 more
doaj   +1 more source

Muscle Non-shivering Thermogenesis and Its Role in the Evolution of Endothermy

Frontiers in Physiology, 2017
The development of sustained, long-term endothermy was one of the major transitions in the evolution of vertebrates. Thermogenesis in endotherms does not only occur via shivering or activity, but also via non-shivering thermogenesis (NST).
Julia Nowack, Sylvain Giroud, Walter Arnold, Thomas Ruf   +3 more
doaj   +1 more source

Shallow Torpor Expression in Free-Ranging Common Hamsters With and Without Food Supplements

Frontiers in Ecology and Evolution, 2018
Energy expenditure during winter can be reduced by expressing torpor, which is characterized by decreased metabolic rate and body temperature. In addition to deep, multiday torpor bouts alternating with short arousal episodes during the hibernation ...
Carina Siutz, Viktoria Ammann, Eva Millesi   +2 more
doaj   +1 more source

Torpor in a passerine bird expands the scope of avian heterothermy

Current Biology
Torpor is a controlled physiological state of reduced metabolism and typically body temperature (Tb) used by some endothermic animals to reduce their resting energy expenditure1,2 and increase survival during unfavorable environmental conditions.3,4,5,6 Passerine birds, the largest avian order, have long been considered limited to shallow reductions of
Alice Barratt, Justin A. Welbergen, Ben D. Moore, Anthony Hunt, Christopher Turbill   +4 more
openaire   +2 more sources

Effects of Food Deprivation and Seasons on Circadian Rhythm in Body Temperature and Bodyweight in Rouen Ducks under Tropical Conditions [PDF]

Journal of Stress Physiology & Biochemistry, 2020
Background: The present study investigated the effects of four days of fasting on colonic temperature (CT) and body weight responses in 20 adult male Rouen ducks (Anas platyrhynchos domesticus) during the hot-dry (12:12 light/dark cycles) and cold-dry ...
Joseph Olusegu Ayo, Ndazo Salka Minka, Fatima Bukar Hassan, Harold Kuta Makeri   +3 more
doaj  

Daily Torpor and Sleep in a Non-human Primate, the Gray Mouse Lemur (Microcebus murinus)

Frontiers in Neuroanatomy, 2019
Daily torpor is an energy-saving process that evolved as an extension of non-rapid eye movement (NREM) sleep mechanisms. In many heterothermic species there is a relation between torpor expression and the repartition of the different behavioral states of
Julie Royo, Fabienne Aujard, Fabien Pifferi   +2 more
doaj   +1 more source

Photoresponsiveness affects life history traits but not oxidative status in a seasonal rodent

Frontiers in Zoology, 2019
Background Shortening photoperiod triggers seasonal adjustments like cessation of reproduction, molting and heterothermy. However there is a considerable among-individual variation in photoresponsiveness within one population.
Anna S. Przybylska, Michał S. Wojciechowski, Małgorzata Jefimow   +2 more
doaj   +1 more source

Temperature as a potential regulator for Ebola virus replication in primary cells from Mops condylurus

Frontiers in Virology
IntroductionFor more than 40 years, outbreaks of ebolavirus disease have been documented, but the natural reservoir(s) of ebolaviruses remain unknown.
Marcel Bokelmann, Marcel Bokelmann, Silke A. Riesle-Sbarbaro, Angelika Lander, Annette Wahlbrink, Martin H. Groschup, Anne Balkema-Buschmann, Emmanuel Couacy-Hymann, Joseph Prescott, Andreas Kurth   +9 more
doaj   +1 more source