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Tag: "behavior" at biology news

Possible brain hormone may unlock mystery of hibernation

...ion complex might also play a role in the seasonal behavior changes of animal species that do not hibernate, the researchers suggested. For example, the complex could moderate physiological events such as reproduction in seasonally breeding mammals and migration in birds, they said. Even humans can maintain ...

Study finds 60 new genes controlled by DNA snippet

...knowledge of how regulatory sequences control gene behavior has the potential to create new classes of treatme...he complete set of DNA sequences that regulate the behavior of genes. DNA segments that code for proteins average 200 base pairs in length, whereas regulatory s...

Teens unaware of sexually transmitted diseases until they catch one, Carnegie Mellon study finds

...out STDs are more likely to engage in risky sexual behavior and to delay the treatment of STDs. And the consequences are severe. Genital herpes, for example, cannot be cured. Genital warts can render a woman more susceptible to cervical cancer, and chlamydia can lead to infertility. A 2004 study, involving t...

How to grow a bigger brain

...almon reared in the wild, and the fish also showed behavior closer to wild than to hatchery-reared fish. "The... Nevitt, professor of neurobiology, physiology and behavior at UC Davis. "A simple change affected brain growth in a large-scale way." The results could affect...

Sex chromosome genes influence aggression andmaternal behavior, say UVa researchers

...o blame male hormones, like testosterone, for male behavior such as aggression. But maybe it's in our genes, too. Indeed such social behavior also has a genetic basis, according to new research on mice by neuroscientists at the University of ...

ASU researchers find link between social behavior, maternal traits in bees

...er describing Amdam's experiments, "Complex social behavior derived from maternal reproductive traits," is the...bees, like carpenter bees, do not engage in social behavior and instead lead solitary lives. This has prompted researchers to look into how social structures an...

Scientists discover new genetic subtypes of common blood cancer

...is driving the disease and influences the clinical behavior of the disease in humans, it immediately goes to the top of the list as a prime candidate for drug development." ...

Hap1 protein links circulating insulin to brain circuits that regulate feeding behavior in mice

...ood and the neural circuitry that controls feeding behavior in mice. Illumination of the neural pathway used by hormones to regulate appetite and eating behavior could eventually provide new drug targets for treating eating disorders and obesity. The research, ...

Parachuting allows krill to eat and run

Antarctic researchers have recorded a novel behavior in krill that may help regulate greenhouse gases. ...day to hide. Previous research has shown that this behavior may be a rapid means of transporting carbon to the ocean's interior. However, the amount sequestered...

Can dogs smell cancer?

... and a clicker, as well as assessment of the dog's behavior by observers blinded to the identity of the cancer patient and control samples, were used in the experiment. The results of the study showed that dogs can detect breast and lung cancer with sensitivity and specificity between 88% and 97%. The high a...

Tumor cells that border normal tissue are told to leave

...ly eyes and wings that permitted them to study the behavior of individual tumor cells. "We found that the tu...n direct contact with normal cells had a different behavior than cells further inside the tumor," says lead author Marcos Vidal, Ph.D., research associate in mo...

Research updates 65-year-old genetic discovery

...ces. Amdam's research found a link between social behavior and maternal traits in bees. A paper describing her experiments was the cover story of the Jan. 5 issue of "Nature," which she wrote with M. Kim Fondrk and Robert Page from ASU, and Angela Csondes from the University of California, Davis. Fondrk is a...

Zebra finches remember songs dad sang

...emales both use them," he says. "A song is a vocal behavior used in male-male interactions and in courtship of females, and in most songbird species, only the male sings." A young zebra finch will hear his father's song, remember and imitate it. At first, the bird's efforts are clumsy ?the songbird equivalent...

Oops! Researchers publish new findings on the brain's response to costly mistakes

...ects of everyday life, with repetitive patterns of behavior to ward off or prevent such events. The new research, published in the Journal of Neuroscience, involved 12 healthy adults who had their brains scanned using a powerful functional MRI (fMRI) imaging machine, while they were asked to respond to a se...

African amphibians make extreme parental sacrifice: The skin off their backs

...e lining of the mother's oviduct. The skin-feeding behavior seen in B. taitanus may represent an evolutionary ...aum said. The discovery of this never-before-seen behavior also highlights the importance of conservation efforts, Nussbaum said. "Concerns have been growing a...

Sociality of sweat bees evolved simultaneously during climate change

...nell University entomologists show that the social behavior of many species of sweat bees evolved simultaneous...e was a critical factor in the evolution of social behavior in these bees," said Bryan Danforth, associate professor of entomology at Cornell. Sweat bees are eu...

Mice lacking social memory molecule take bullying in stride

...r social memory circuit. Yet, the social avoidance behavior was reversible by giving the animals antidepressan... mice were spared from developing social avoidance behavior following repeated social defeat. "Without BDNF in the circuit, an animal can't learn that a soci...

Access to antiretrovirals unlikely to reduce HIV infection rates

...fferent ways that people might change their sexual behavior if they get treatment (which might make them feel ...utcome on HIV prevalence depends critically on the behavior of these individuals. These results suggest that provision of ART to symptomatic AIDS patients and...

Researchers now able to look deep into heart to view triggers of a heart's beat

...ps that are thought to underlie the complex social behavior of Hymenopteran insects. One of the key steps in the evolution of social insects, therefore, may have been the development of a mechanism for making centrosomes from scratch. "The Hymenoptera were probably derived from a species that had accessory n...

Insects that produce males from unfertilized eggs reveal a surprising cellular feat

...ps that are thought to underlie the complex social behavior of Hymenopteran insects. One of the key steps in the evolution of social insects, therefore, may have been the development of a mechanism for making centrosomes from scratch. "The Hymenoptera were probably derived from a species that had accessory n...

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