Results 91 to 100 of about 19,369 (273)

Post-Meiotic Intra-Testicular Sperm Senescence in a Wild Vertebrate

, 2012
There is growing interest in sperm senescence, both in its underlying mechanisms and evolutionary consequences, because it can impact the evolution of numerous life history traits. Previous studies have documented various types of sperm senescence, but
Richard H. Wagner, Penn, Dustin J., Richard H Wagner, Hoi Herbert, Wagner, Richard H., Hettyey Attila, Hoi, Herbert, Attila Hettyey, Dustin J. Penn, Balázs Vági, Herbert Hoi, Vági Balázs, Wagner Richard H., Penn Dustin J., Hettyey, Attila, Vági, Balázs, Dustin J Penn   +16 more
core   +1 more source

Endogenous colony dormancy shapes seasonal cold tolerance in temperate ants

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract As eusocial superorganisms, cold‐adapted ants must survive multiple consecutive winters and are shaped by selective pressures acting at both individual and colony‐level.
Quentin Willot, Vladimir Kostal, Martin Moos, Johannes Overgaard   +3 more
wiley   +1 more source

Mechanisms controlling mammalian hibernation

, 1992
P(論文)Seasonal cold or long term cold exposure induces hibernation in certain species of mammals. Hibernation is a physiological state in which extreme but regulated reductions in body temperature, metabolic rate and other physiological systems occur. The
中村, 明弘, 塩見, 浩人, 32832, 32833   +3 more
core  

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

Liver transcriptome analysis reveals the molecular response to hibernation challenge in the Chinese soft-shelled turtle (Pelodiscus sinensis)

Frontiers in Marine Science
Hibernation is a physiological strategy animals use to survive in hostile environments with extreme temperature challenges and food scarcity. During this state, significant changes occur in metabolism and cellular function, with numerous stress response ...
Muhammad Shahid Iqbal, Xiaoqi Ai, Qingjun Zhu, Ijaz Khan, Zeeshan Ali, Tian Lan, Li Ding, Meiling Hong   +7 more
doaj   +1 more source

Physiological criticality in hibernation dynamics

, 2019
Hibernation has been selected for increasing survival in harsh climatic environments. Seasonal variability in temperature may push body temperature of hibernating animals across boundaries of alternative states between euthermic temperature and torpor ...
Freixas, Lídia, Oro, Daniel
core  

Asymmetric niche partitioning in large omnivores in response to anthropogenic disturbances within subarctic ecosystems

Journal of Animal Ecology, EarlyView.
Anthropogenic disturbances associated with mineral extraction influenced space use and activity patterns in grizzly bears, and to a much lesser extent in black bears, in a subarctic ecosystem, signalling an asymmetric response. Abstract Niche partitioning is an evolutionary process that allows the coexistence of multiple species in a landscape. However,
Ludovick Brown, Chrystal Mantyka‐Pringle, Joël Potié, Pascale Savage, Megan Hornseth, Jason T. Fisher   +5 more
wiley   +1 more source

Immunoreactivities of PPARγ2, leptin and leptin receptor in oviduct of Chinese brown frog during breeding period and pre-hibernation

European Journal of Histochemistry, 2014
The Chinese brown frog (Rana dybowskii) is a special amphibian with one unique physiological phenomenon, which is that its oviduct expands prior to hibernation, instead of during the breeding period.
Y. Liu, J. Weng, S. Huang, Y. Shen, X. Sheng, Y. Han, M. Xu, Q. Weng   +7 more
doaj   +1 more source

Variations of body length, weight, fat content and survival in Coccinella septempunctata at different hibernation sites

, 1995
Adults of Coccinella septempunctata L. (Coleoptera; Coccinellidae) were sampled in four overwintering sites: one in England and three at different altitudes in the Czech Republic (350-1420 m above sea level) in autumn 1992 and spring 1993.
Zhou, X-L, Carter, N., Powell, W., Honek, A.   +3 more
core  

Offspring performance does not explain oviposition preference in the leafminer Stigmella sorbi (Lepidoptera: Nepticulidae): a tri‐trophic perspective

Insect Science, EarlyView.
We studied oviposition site selection in a leaf‐mining moth (Stigmella sorbi) on rowan trees (Sorbus aucuparia) in northwestern Russia, assessing larval performance across different shoot types, leaf positions, and leaflets. Larval survival was highest on long vegetative shoots, yet females showed no preference for these optimal sites.
Mikhail V. Kozlov, Vitali Zverev
wiley   +1 more source