Results 31 to 40 of about 2,772 (172)

Daily torpor in mice: high foraging costs trigger energy-saving hypothermia [PDF]

Biology Letters, 2009
Many animal species employ natural hypothermia in seasonal (hibernation) and daily (torpor) strategies to save energy. Facultative daily torpor is a typical response to fluctuations in food availability, but the relationship between environmental quality, foraging behaviour and torpor responses is poorly understood.
Schubert, Kristin A., Boerema, Ate S., Vaanholt, Lobke M., de Boer, Sietse F., Strijkstra, Arjen M., Daan, Serge   +5 more
openaire   +2 more sources

Cytokine and Antioxidant Regulation in the Intestine of the Gray Mouse Lemur (Microcebus murinus) During Torpor

Genomics, Proteomics & Bioinformatics, 2015
During food shortages, the gray mouse lemur (Microcebus murinus) of Madagascar experiences daily torpor thereby reducing energy expenditures. The present study aimed to understand the impacts of torpor on the immune system and antioxidant response in the
Shannon N. Tessier, Barbara A. Katzenback, Fabien Pifferi, Martine Perret, Kenneth B. Storey   +4 more
doaj   +1 more source

Cold-induced suspension and resetting of Ca2+ and transcriptional rhythms in the suprachiasmatic nucleus neurons

iScience, 2023
Summary: Does the circadian clock keep running under such hypothermic states as daily torpor and hibernation? This fundamental question has been a research subject for decades but has remained unsettled.
Ryosuke Enoki, Naohiro Kon, Kimiko Shimizu, Kenta Kobayashi, Sota Hiro, Ching-Pu Chang, Tatsuto Nakane, Hirokazu Ishii, Joe Sakamoto, Yoshifumi Yamaguchi, Tomomi Nemoto   +10 more
doaj   +1 more source

Induction of Antioxidant and Heat Shock Protein Responses During Torpor in the Gray Mouse Lemur, Microcebus murinus

Genomics, Proteomics & Bioinformatics, 2015
A natural tolerance of various environmental stresses is typically supported by various cytoprotective mechanisms that protect macromolecules and promote extended viability.
Cheng-Wei Wu, Kyle K. Biggar, Jing Zhang, Shannon N. Tessier, Fabien Pifferi, Martine Perret, Kenneth B. Storey   +6 more
doaj   +1 more source

The Influence of Photoperiod, Intake of Polyunsaturated Fatty Acids, and Food Availability on Seasonal Acclimatization in Red Deer (Cervus elaphus)

Animals, 2023
Hypometabolism and hypothermia are common reactions of birds and mammals to cope with harsh winter conditions. In small mammals, the occurrence of hibernation and daily torpor is entrained by photoperiod, and the magnitude of hypometabolism and decrease ...
Kristina Gasch, Manuela Habe, Julie Sophie Krauss, Johanna Painer-Gigler, Gabrielle Stalder, Walter Arnold   +5 more
doaj   +1 more source

Physiological, Behavioral, and Life-History Adaptations to Environmental Fluctuations in the Edible Dormouse

Frontiers in Physiology, 2020
The edible dormouse (Glis glis, formerly Myoxus glis) is a small arboreal mammal inhabiting deciduous forests in Europe. This rodent shows behavioral and physiological adaptations to three types of environmental fluctuations: (i) predictable seasonal ...
Thomas Ruf, Claudia Bieber
doaj   +1 more source

Torpor on demand: heterothermy in the non-lemur primate Galago moholi. [PDF]

PLoS ONE, 2010
Hibernation and daily torpor are energy- and water-saving adaptations employed to survive unfavourable periods mostly in temperate and arctic environments, but also in tropical and arid climates.
Julia Nowack, Nomakwezi Mzilikazi, Kathrin H Dausmann   +2 more
doaj   +1 more source

Sentipensar [Feel‐Thinking] Cultivates Collective Scientific Sensemaking and Worldbuilding Within and Beyond Ecological Despair

Science Education, EarlyView.
ABSTRACT Educating youth about environmental and climate justice is crucial in realizing a sustainable and flourishing future. Yet this can be challenging given the intense eco‐emotions youth experience and express while learning about these consequential realities and their implications.
Kelsie Fowler
wiley   +1 more source

Role of PPARα in the Control of Torpor through FGF21-NPY Pathway: From Circadian Clock to Seasonal Change in Mammals

PPAR Research, 2009
In nature, hibernating animals encounter fasting, cold temperature and short day seasonally. Torpor is a state of decreased physiological activity in an animal, usually characterized by a reduced body temperature and rate of metabolism to adapt such a ...
Norio Ishida
doaj   +1 more source

Torpor‐assisted migration: Regular use of shallow torpor reduces rest‐phase energy expenditure for songbirds during migration

Journal of Animal Ecology, EarlyView.
Migrating songbirds regularly use shallow torpor (up to 98% of birds for some species) to save energy (up to 42%) during inactive periods. This Ruby‐crowned Kinglet Corthylio calendula that was captured after a spring snowstorm highlights the value of being able to save energy when encountering unfavourable conditions.
Ryan A. C. Leys, Lily Hou, Liam P. McGuire   +2 more
wiley   +1 more source