Results 31 to 40 of about 485 (157)

Mating in the cold. Prolonged sperm storage provides opportunities for forced copulation by male bats during winter

open access: yesFrontiers in Physiology, 2023
In a wide range of heterothermic mammals, hibernation interrupts the reproductive cycle by forcing reproductive delays. In hibernating bats with delayed fertilization, an opportunity for sperm competition is enhanced by extending a time-window between ...
Takahiro Sato   +3 more
doaj   +1 more source

Heterothermy is associated with reduced fitness in wild rabbits [PDF]

open access: yesBiology Letters, 2017
An increase in variation in the 24 h pattern of body temperature (heterothermy) in mammals can be induced by energy and water deficits. Since performance traits such as growth and reproduction also are impacted by energy and water balance, we investigated whether the characteristics of the body temperature rhythm provide an indication of ...
Shane K. Maloney   +3 more
openaire   +2 more sources

Searching for the Haplorrhine Heterotherm: Field and Laboratory Data of Free-Ranging Tarsiers

open access: yesFrontiers in Physiology, 2017
The observation of heterothermy in a single suborder (Strepsirrhini) only within the primates is puzzling. Given that the placental-mammal ancestor was likely a heterotherm, we explored the potential for heterothermy in a primate closely related to the ...
Shaun Welman   +2 more
doaj   +1 more source

Seasonal Expression of Avian and Mammalian Daily Torpor and Hibernation: Not a Simple Summer-Winter Affair†

open access: yesFrontiers in Physiology, 2020
Daily torpor and hibernation (multiday torpor) are the most efficient means for energy conservation in endothermic birds and mammals and are used by many small species to deal with a number of challenges.
Fritz Geiser
doaj   +1 more source

Increased Diurnal Activity Is Indicative of Energy Deficit in a Nocturnal Mammal, the Aardvark

open access: yesFrontiers in Physiology, 2020
Shifting activity to cooler times of day buffers animals from increased heat and aridity under climate change. Conversely, when resources are limited, some nocturnal species become more diurnal, reducing energetic costs of keeping warm at night ...
Nora Marie Weyer   +12 more
doaj   +1 more source

Cytoskeletal regulation dominates temperature-sensitive proteomic changes of hibernation in forebrain of 13-lined ground squirrels. [PDF]

open access: yesPLoS ONE, 2013
13-lined ground squirrels, Ictidomys tridecemlineatus, are obligate hibernators that transition annually between summer homeothermy and winter heterothermy - wherein they exploit episodic torpor bouts.
Allyson G Hindle, Sandra L Martin
doaj   +1 more source

Lifelong Effects of Thermal Challenges During Development in Birds and Mammals

open access: yesFrontiers in Physiology, 2020
Before they develop competent endothermy, mammals and birds are sensitive to fluctuating temperature. It follows that early life thermal environment can trigger changes to the ontogeny of thermoregulatory control.
Andreas Nord, Sylvain Giroud
doaj   +1 more source

Modelling mammalian energetics: the heterothermy problem [PDF]

open access: yesClimate Change Responses, 2016
Global climate change is expected to have strong effects on the world’s flora and fauna. As a result, there has been a recent increase in the number of meta-analyses and mechanistic models that attempt to predict potential responses of mammals to changing climates.
Levesque, DL, Nowack, J, Stawski, C
openaire   +1 more source

Avian Reproduction in a Warming World

open access: yesFrontiers in Ecology and Evolution, 2020
Weather influences both the distribution and life-history strategies of birds. Temperature ranks amongst the more important weather parameters in this regard since warming springs in temperate and high latitudes and more frequent heat-waves globally have
Fredrik Andreasson   +2 more
doaj   +1 more source

A new thermoregulatory index for heterothermy

open access: yesMethods in Ecology and Evolution, 2013
Summary The controlled adjustment of body temperature (Tb) by animals in relation to ambient temperature (Ta), or heterothermy, is a phenomenon that has a clear adaptive value. Heterothermy results in a substantial reduction in energy expenditure and water loss, but it also incurs costs, such as the energy cost required for rewarming, energy cost of ...
Agustí Muñoz‐Garcia   +4 more
openaire   +1 more source

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