Poison dart frog mimics gain when birds learn to stay away
...e toxic species in the community." Taking predator avoidance learning into account, says Cummings, you can succ...hose that weren't exact mimics. The birds' learned avoidance and generalization helps explain how the harmless mimic frog can be more abundant than its model. (I...Mechanism for memory revealed in neurons of electric fish
.... Oestreich and Zakon found that once the jamming avoidance has started, the fish's neurons continue to discharge at a higher frequency, even after its neighbor fish may have swum away. The researchers discovered that the neurons' memory was not caused by increased flow of glutamate to their synapses. Glutam...Mice lacking social memory molecule take bullying in stride
The social avoidance that normally develops when a mouse repeatedly exp...ly in their social memory circuit. Yet, the social avoidance behavior was reversible by giving the animals antidepressants. Next, borrowing a page from gene the...Red grapefruit appears to lower cholesterol, fight heart disease
... Appropriate exercise, well-balanced nutrition and avoidance of tobacco also are important factors in reducing the risk of heart disease, health experts say....Academy honors 15 for major contributions to science
... contextualized, can illuminate strategies for the avoidance of nuclear war." The award was established by a gift of William and Katherine Estes and has been presented since 1990. NAS AWARD IN CHEMICAL SCIENCES a medal and prize of $15,000 awarded annually for innovative research in the chemical sciences th...Worms know bad food when they smell it
... learn that the bad bacteria are bad." The worms' avoidance of food that has made them sick in the past is analogous to the strongest form of learning known in humans, Bargmann said. "If you eat something and it gives you food poisoning especially if it's a flavor that you haven't experienced before, and esp...JCI table of contents September 1, 2005
...? This intriguing article raises the issue of the avoidance of anergy induction in the design of treatment regimens that use alpha-galactosylceramide as a specific activator of NKT cells." TITLE : Glycolipid antigen induces long-term natural killer T cell anergy in mice AUTHOR CONTACT : Luc Van Kaer Vander...Erotic images, gore cause temporary 'blindness'
...ns. The researchers found that those with low harm avoidance scores were better able to stay focused on the targets than those with high harm avoidance scores. Zald believes one explanation for the differences in performance during the experiment is th...Ecology must be part of research on renewable energy
...mission of electromagnetic fields and collision or avoidance with the energy structures represent further potential impacts on coastal species, particularly large predators." Any such environmental effects need to be considered in addition to the existing pressure exerted on our coasts. In the absence of publi...Evolution of taste receptor may have shaped human sensitivity to toxic compounds
... pivotal role for bitter-taste perception in toxin avoidance in humans, an attribute that could have come into particular play during periods of expansion into new environments. More broadly, the work contributes to the debate on the mechanisms governing the evolution of chemical sensory perception and on the ...Toxins drove evolution of human taste sense, global study reveals
...ant may have been advantageous in our past through avoidance of natural toxins, one might speculate that it may now contribute to increasing disease risk through lowered intake of such beneficial compounds." Also noteworthy, the team reported, human populations in Africa have retained moderately high frequenci...Costly breeding programs for endangered species pay off
...udy is the first to compare the so-called "maximum avoidance inbreeding," or MAI strategy, with regimens that allow limited inbreeding. "In previous studies, a number of groups identified short-term benefits for breeding schemes that used limited inbreeding in order to produce stronger individuals," said Lisa ...Salmon survival, cleaner hydropower focus of ORNL research
... evaluate whether a turbine-passed fish's predator avoidance behavior is compromised compared to the behavior of unstressed control fish," Cada said. "In addition, we are testing the hypothesis that the advanced turbine induces less sub-lethal stress than the conventional turbine." A final report for the C-sta...Study in Royal Society journal on heritability of female orgasm
...s. The present radar study documents a substantial avoidance response by migrating waterbirds to a large offshore wind farm. A larger proportion of the birds fly between the turbines at night compared to day time, but counteract this higher risk of colliding with the turbines in the dark by keeping a longer di...Taking the piste out of Alpine vegetation
...ntensification of use as a ski piste, and complete avoidance of areas with vegetation of articularly high conservation value," they say. Some alpine ecosystems are extraordinarily rich in species, but they are also sensitive and susceptible to changes in land use and climate....Histamine, anxiety and alcoholism
...d that if any association with alcoholism and harm avoidance were to be found in the same direction in both pop...of anxious personality or anxiety proneness. "Harm avoidance measures the range of 'normal' anxiety present in the general populations; it is not a measure of pa...Study in Royal Society journal on first evidence for magnetic field detection in sharks
...the cheats instead. Thus, paradoxically, it is not avoidance signalling that stabilises the warning signals, but the actions of predators who are invited to taste the prey. Contact: Dr Gabriella Gamberale Stille, Department of Zoology, Stockholm University, 106 91 Stockholm, SWEDEN Ancient DNA by Dr E Willer...Idaho lab, Utah company achieve major milestone in hydrogen research
...ventional electrolysis. Added benefits include the avoidance of both greenhouse gas emissions and fossil fuel consumption. "We've shown that hydrogen can be produced at temperatures and pressures suitable for a Generation IV reactor," said lead INEEL researcher Steve Herring. "The simple and modular approac...Studies in Royal Society journals include stress in birds and depletion of medieval fish stocks
...ght colours are not necessary to generate predator avoidance of noxious prey. It also demonstrates that Batesian mimicry of inconspicuous but characteristic patterns is possible, and may have been important in the evolution of snakes. Contact: Dr Wolfgang Wuster, School of Biological Sciences, University of Wa...