Results 31 to 40 of about 1,122,223 (383)
Journal of Biological Dynamics, 2020 In this paper, we first investigate a stochastic two-predators one-prey model with Lévy noise and distributed delays. The global dynamical behaviour is discussed.
Nafeisha Tuerxun +2 more
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AIMS Mathematics, 2023 The present study aims to consider a mathematical eco-epidemiological model involving two fractional operators. To this end, we provide approximate solutions to these fractional systems through the application of a numerical technique that is based on ...
Reny George +4 more
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The Mid-Infrared Extinction Law in the Ophiuchus, Perseus, and Serpens Molecular Clouds [PDF]
, 2008 We compute the mid-infrared extinction law from 3.6-24 microns in three molecular clouds: Ophiuchus, Perseus, and Serpens, by combining data from the "Cores to Disks" Spitzer Legacy Science program with deep JHKs imaging.
Chapman, Nicholas L. +3 more
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Frontiers in Genetics, 2013 The Galápagos Islands are known to have experienced significant drought during the Quaternary. The loss of mesophytic upland habitats has been suggested to underlie the relatively lower endemism of upland compared with lowland plant assemblages.
Aaron F Collins +2 more
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The politics of animal extinction and conservation: Interests, framing, and policy
Journal of Political Ecology, 2023 Why do conservation policies fail to prevent species extinctions and die-offs in contravention of stated intentions and goals? Bringing together a range of literature, including political ecology, political theory, conservation science, communication ...
Maria Armoudian
doaj +2 more sources
Eyeblink Classical Conditioning and Post Traumatic Stress Disorder – A Model Systems Approach
Frontiers in Psychiatry, 2015 Not everyone exposed to trauma suffers flashbacks, bad dreams, numbing, fear, anxiety, sleeplessness, hyper-vigilance, hyperarousal, or an inability to cope, but those who do may suffer from post traumatic stress disorder (PTSD).
Bernard G Schreurs +3 more
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Integrating deep-time palaeontology in conservation prioritisation
Frontiers in Ecology and Evolution, 2022 Halting biodiversity loss under growing anthropogenic pressure is arguably the greatest environmental challenge we face. Given that not all species are equally threatened and that resources are always limited, establishing robust prioritisation schemes ...
Catalina Pimiento +5 more
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Extinction risk and conservation of the world’s sharks and rays [PDF]
eLife, 2013 The rapid expansion of human activities threatens ocean-wide biodiversity. Numerous marine animal populations have declined, yet it remains unclear whether these trends are symptomatic of a chronic accumulation of global marine extinction risk.
N. Dulvy +22 more
semanticscholar +1 more source
Frontiers in Behavioral Neuroscience, 2016 Dopamine receptor activation in the nucleus accumbens (NAc) promotes vigorous environmentally-cued food-seeking in hungry rats. Rats fed ad libitum, however, respond to fewer food-predictive cues, particularly when the value of food reward is low.
Saleem M. Nicola +3 more
doaj +1 more source
Impaired contextual modulation of memories in PTSD: an fMRI and psychophysiological study of extinction retention and fear renewal [PDF]
, 2014 Post-traumatic stress disorder (PTSD) patients display pervasive fear memories, expressed indiscriminately. Proposed mechanisms include enhanced fear learning and impaired extinction or extinction recall. Documented extinction recall deficits and failure
Abelson, James L +6 more
core +1 more source