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Tag: "biases" at biology news

Migration alert -- How tumor cells home in on the lymphatic system

...he tumor into the lymphatic vessel. This slow flow biases the concentration distribution of this molecule towards the lymphatic, and the tumor cell follows it, like the proverbial carrot on a stick. Near the vessel, concentrations of the signaling molecule are reinforced by the lymphatic’s own secretions, f...

New study finds similarities between monkey business and human business

...ntion has been paid to whether systematic economic biases such as risk-aversion are learned behaviors ?and thus easily ameliorated through market incentives ?or biologically based, arising in novel situations and in spite of experience. In a groundbreaking new study from the Journal of Political Economy, Ya...

New human retrovirus originated in mice

...ible to analyze these samples without preconceived biases about what viruses might be present. "Since the chip represents every known virus in one assay, it is agnostic as to what might be found," he said. "We would never have looked for this class of virus if it wasn't for the virus chip." Importantly, th...

Aggression-related gene weakens brain's impulse control circuits

... people, we were able to see how this gene variant biases the brain toward impulsive, aggressive behavior." The gene is one of two common versions that code for the enzyme monoamine oxydase-A (MAO-A), which breaks down key mood-regulating chemical messengers, most notably serotonin. The previously identif...

Mosquitoes are more attracted to individuals infected with malaria

...and, if it is not considered, could lead to severe biases in the estimates of the intensity of malaria transmission. Citation: Lacroix R, Mukabana WR, Gouagna LC, Koella JC (2005) Malaria infection increases attractiveness of humans to mosquitoes. PLoS Biol 3(9): e298. ...

Biased reporting found in cancer prognostic studies

Selective reporting biases may taint many published studies of so-called prog...re beginning to question the validity and possible biases in many of the studies. To examine the question of selective reporting bias, Panayiotis A. Kyzas an...

Looks matter to female barn swallows

...e first study of its kind to meticulously rule out biases such as age, size and initial variation in signals of male quality, like coloration, and to demonstrate that mate-selection decisions are continual and dynamic. The results of the study have implications for the evolution and upkeep of showy ornament...

Space matters: Estimating species diversity in the fossil record

...nt geographic areas. After correcting for possible biases in sample size that might influence the number of species, Barnosky et al. found a strong species-area effect. These results, they argue, suggest that many fluctuations in diversity seen in fossil analyses actually arise from the species-area effect...

IMF Launches World’s First DNA Database for Myeloma Patients

...s-- selection acting within the female's body that biases fertilization toward males with a particular genital morphology has been largely responsible for the generation of genital diversity. Langerhans's finding, however, contradicts that theory: he has shown that female mosquitofish make their choice befo...

Certain fish have a special mating preference

...s-- selection acting within the female's body that biases fertilization toward males with a particular genital morphology has been largely responsible for the generation of genital diversity. Langerhans's finding, however, contradicts that theory: he has shown that female mosquitofish make their choice befo...

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