Results 151 to 160 of about 9,586 (211)

Giants in the cold: Morphological evidence for vascular heat retention in the viscera but not the skeletal muscle of the basking shark (Cetorhinus maximus)

Journal of Fish Biology, EarlyView.
Abstract Fewer than 50 of the over 30,000 extant species of fishes have developed anatomical specializations facilitating endothermy in specific body regions. The plankton‐feeding basking shark (Cetorhinus maximus), traditionally classified as an ectotherm, was recently shown to have regionally endothermic traits such as centralized red muscle (RM ...
C. Antonia Klöcker, Axel Schlindwein, Martin C. Arostegui, Ingrid M. Bruvold, Joel V. Wernström, Montserrat Martin‐Armas, David W. Sims, Nicolas Straube, Andreas Altenburger, Claudia Junge   +9 more
wiley   +1 more source

Limits and mechanisms of honey bee colonial thermoregulation in the heat. [PDF]

J Exp Biol
Harrison JF, Chen J, Glass JR, Ozturk C, Smith BH, Fewell JH, DeGrandi-Hoffman G, Kang Y, Sorensen B, Rothweil D, DesJardins NS, Fisher A.   +11 more
europepmc   +1 more source

Arctic lake trout (Salvelinus namaycush) show evidence of seasonal acclimation of cardiac adrenergic sensitivity but not heat tolerance

Journal of Fish Biology, EarlyView.
Abstract Many Arctic fishes experience prolonged periods of extreme cold and large thermal variation over both rapid and seasonal time scales which challenge critical physiological functions. In the central Canadian Arctic, we caught wild adult lake trout (Salvelinus namaycush) acclimatized to winter and summer temperatures to determine the extent to ...
Emily P. Williams, Les N. Harris, Jean‐Sébastien Moore, Ella K. Middleton, Shira A. Berkelhammer, Ben Speers‐Roesch, Matthew J. H. Gilbert   +6 more
wiley   +1 more source

Neural Control of Homeothermy, Torpor, and Hibernation. [PDF]

Annu Rev Neurosci
Griffith EC, Hrvatin S.
europepmc   +1 more source

Body Composition, Physical Activity and Energy Requirements Estimated Using Two Isotopic Methods in Old and Adult Beagle Dogs

Journal of Animal Physiology and Animal Nutrition, EarlyView.
ABSTRACT Energy requirements (ER) are known to decline as dogs age into the senior stage. However, the implications of body composition and physical activity (PA) on this parameter remain poorly investigated. The aim of this study was to evaluate ER, body composition, water turnover rate (WTR), and voluntary PA by triaxial accelerometers in adults (5.2 
Ariel de Castro, Letícia Graziele Pacheco, Camila Goloni, Vladimir Eliodoro Costa, Aulus Cavalieri Carciofi   +4 more
wiley   +1 more source

The influence of pupal colour on diapause and post‐diapause success in the swallowtail butterfly Papilio machaon

Physiological Entomology, EarlyView.
The swallowtail butterfly Papilio machaon has a brown‐ and green‐coloured morph, with the brown being more common in the diapausing generation. The darker colouration of brown pupae did not confer advantages for thermoregulation when developing, but they did have lower diapause metabolic rates.
Kevin T. Roberts, Philipp Lehmann
wiley   +1 more source

Radio Frequency Exposure in Military Contexts: A Narrative Review of Thermal Effects and Safety Considerations. [PDF]

Mil Med
Risling M, Günther M.
europepmc   +1 more source

Intermittent hand and forearm immersion in 20°C water attenuates thermal, cardiovascular, and perceptual strain in older adults during heat stress

Experimental Physiology, EarlyView.
Abstract Adults >65 years of age experience deleterious health effects during extreme heat events at a greater rate than any other age cohort. The purpose of this study was to identify the effectiveness of acute intermittent hand and forearm (H+F) water immersion and/or chronic (7 week) folic acid supplementation on reducing thermal and cardiovascular ...
Rachel M. Cottle, Kat G. Fisher, Olivia K. Leach, David E. Conroy, Lacy M. Alexander, W. Larry Kenney   +5 more
wiley   +1 more source

Co-occurring Agamid Lizards Vary in Thermal Vulnerability Despite Similar Climatic Exposure. [PDF]

Integr Org Biol
Ben A, Razak M, Thaker M.
europepmc   +1 more source

No evidence of higher peak heat tolerance in the afternoon or with opportunity for thermal behaviour during low‐intensity work in uncompensable heat

Experimental Physiology, EarlyView.
Abstract Heat tolerance is known to be limited by high brain temperature, but most findings pertain to strenuous exercise following artificially altered baseline temperature or with limited opportunity for behaviour. Therefore, we investigated the hypotheses that thermal perceptions, hyperventilation and cerebrovascular responses would be exacerbated ...
Tiarna Stothers, Travis Dylan Gibbons, Kate Nicole Thomas, Emma Jones, Holly Ann Campbell, James David Cotter   +5 more
wiley   +1 more source