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Tag: "finds" at biology news

The price of vanity: Mating with showy males may reduce offspring's ability to fight off pathogens

...study by Judith Mank (Uppsala University, Sweden) finds that mating with males who possess showy traits ?such as bright colors or long tails and fins ?results in higher testosterone levels in males over many generations. Because male and female testosterone levels are correlated, female choice also resul...

Bacteria control how infectious they become, study finds

...cally masked,?Svetlov said. It's only when RfaH finds the appropriate target sequence on a bacterium's DNA that this small portion of the protein is unmasked and can then turn on a select group of genes. These genes let disease-causing bacteria infect their host while at the same time protecting the bac...

Are one-third of costly implanted heart devices unnecessary? New study suggests yes

...ills 300,000 Americans each year. But a new study finds that while many of these patients will benefit from their ICDs, a large number won't -- and a simple heart-rhythm test can tell who's who. In fact, the study suggests that if the test were used on the majority of ICD candidates, as many as one-thi...

Study examines risk of soft tissue sarcomas in hereditary retinoblastoma survivors

...ping specific subtypes of soft tissue sarcomas and finds that this risk persists for decades after the original retinoblastoma diagnosis. The findings emphasize the importance of regular medical surveillance for these patients, the authors say. Retinoblastoma is a rare cancer of the retina that primarily...

Eating with our eyes: Why people eat less at unbused tables

...ss than people who had no such environmental cues, finds a new Cornell study. The difference between the two groups -- those eating at a table where leftover bones accumulated compared with those whose leftovers were removed -- was greater for men than for women. "The results suggest that people restric...

Male-killing bacteria makes female butterflies more promiscuous

A study at UCL (University College London) finds that a high-prevalence of male-killing bacteria active in many species of insect including the butterfly, actually increases female promiscuity and male fatigue. The team found that when the male insect population drops -- killed off by the bacteria...

Fish extinctions alter critical nutrients in water, study shows

...e Proceedings of the National Academy of Sciences, finds that overfishing could threaten the overall health of an ecosystem because it targets important fish species that play major roles in recycling nutrients. In fact, 20 percent of fish species accounted for more than half of all the recycled nutrients ...

Hives ferment a yeasty brew, attract beetle pest

... the colony," says Tumlinson. "Perhaps one beetle finds and carries the yeast in and it reproduces, or, because the yeast grows on pollen in nature, perhaps bees bring it into the hive." This combination of domestic honeybees, small hive beetles and yeast produced IPA leads to combs so messy that the b...

Do fruit flies have free will?

...ad, if we ask 'how close to free will are we"' one finds that this is precisely where humans and animals differ". The next step will be to use genetics to localize and understand the brain circuits responsible for the spontaneous behavior. This step could lead directly to the development of robots with ...

Cow protein aids in treatment of gastrointestinal disorder

...ished in The American Journal of Gastroenterology, finds that adding a bovine protein called lactoferrin to the existing treatment may yield more effective results, with fewer of the side effects associated with common antibiotic treatment. Lactoferrin has previously been found to be effective at inhibiti...

Study offers clues to 'Broken Heart Syndrome'

...n laboratory, when the interventional cardiologist finds no blockage in the coronary arteries. To date, the registry has enrolled 40 patients diagnosed with Takotsubo cardiomyopathy at two major hospitals in Rhode Island over a period of nearly 2½ years. Ninety-five percent were women, and 60 percent e...

An ancient bathtub ring of mammoth fossils

...e identified 62 sites of known or suspected fossil finds and have verified and collected additional materia...of days. Preliminary results place most mammoth finds in the Lake Lewis area at elevations of 600 to 1,000 feet, which echoes the distribution of boulders...

Alien plants attack using 'resource conservation' as weapon, researchers say

...But a new study by Stanford University researchers finds that invasive plants can flourish in low-resource environments by adopting efficient ways to use available resources. The finding, which sheds new light on how invaders achieve success, may change the way scientists think about invasive species an...

Chronic fatigue syndrome impairs a person's slow wave activity during sleep

...ublished in the May 1st issue of the journal SLEEP finds that CFS is also associated with a blunted slow wave activity (SWA) response to sleep challenge, suggesting an impairment of the basic sleep drive and homeostatic response. The study, authored by Roseanna Armitage, PhD, and colleagues at the Univers...

Hearts of male and female rainbow trout are different

...tudy begins to close the gender gap in fishes, and finds that sex differences in cardiac performance and metabolism exist in rainbow trout. These differences occur at a young age and are only realized when the trout heart is contracting and not under resting conditions. The study is entitled Sex Differ...

Male circumcision overstated as prevention tool against AIDS

... uncovered some surprising results. The new study finds that the number of infected prostitutes in a count... the number of prostitutes in a country. The study finds that the more Muslim countries of North Africa do indeed suffer much less AIDS than southern and wes...

Researchers discover 'acquired' DNA key to certain bacterial infection

...sland’ of acquired genetic material, the bacterium finds a way to get inside the cells and it takes control, not the phagocyte.” Phagocytes are cells that engulf and digest pathogens and cellular debris, and in humans serve as the body’s initial immune response. The researchers did not find a simila...

The insect vector always bites twice

... an infected vertebrate host. The pathogenic agent finds conditions to reproduce and proliferate in the vector’s body. In most cases, the parasite moves back into the vector’s salivary glands in order to be transmitted to the human host when the insect bites again to take another blood meal. Morbidity amon...

Prenatal Stress Keeps Infants, Toddlers up at Night, Study Says

...erience sleep problems in infancy and toddlerhood, finds a study that published this month in Early Human Development. While this finding presents itself as important news to tired new moms and dads for whom a soundly sleeping child spells out well-deserved respite it may carry even more value for b...

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