Electric fish in Africa could be example of evolution in action
...ion is possible. One common type of speciation is geographically dependent. Animals diverge into separate species because they become physically isolated from each other. Eventually, genes within each group mutate so that the groups can no longer be considered to be of the same species. Another type of speciation,...Salk research suggests the existence of specialized neurons that distinguish swagger from sway
...nstitute. "The gaits of males and females may vary geographically or culturally and this mechanism allows us to adapt very quickly to local ways of walking," he adds. How humans move reflects, in part, gender-specific differences in shape such hip-to-waist ratio and the like. Such inherent differences in gait migh...NIH launches clinical studies nationwide to investigate rare diseases
...the costs of developing treatments for such small, geographically dispersed populations. "By studying the genetic component of these rare diseases, we hope to be able to better predict the course of the illnesses and provide more effective, personalized treatments for those afflicted," said Elias A. Zerhouni, M.D...Wisconsin scientists discover a master key to microbes' pathogenic lifestyles
...very of a master switch in related but diverse and geographically widespread class of fungi is an indication that it was acquired from a common ancestor deep in evolutionary history. The feature is a common mechanism used by the different organisms to adapt to a new environment: the lungs of animals. "It is a stor...For some young fish, early gene expression is a clear harbinger of fated lifestyle
...s more surprisingly, less-related individuals from geographically different populations nonetheless exhibit very similar patterns of gene expression if they have adopted the same fate--residential or migratory. Thus, the researchers found that levels of expression of a great many genes depend primarily on an indivi...Experimental evolution of yeast in the lab may illuminate early events in speciation
...into two when genetic barriers arise that keep two geographically mixed groups (populations) of the species from mating with each other. But what sorts of genetic barriers might arise in a living population that could lead to this kind of reproductive barrier? Scientists Jun-Yi Leu and Andrew Murray at Harvard Uni...Report lists top 20 most-vulnerable African carnivores
...rnivores. In addition, many research programs are geographically biased toward East and Southern Africa, sometimes at odds with the urgent need for increased conservation action in other parts of Africa. "Africa is world famous for its variety of carnivore species from lions to hyenas," said Dr. Luke Hunter a co-a...Vital ocean prey play active role in environment
... other adults. These groups are believed to remain geographically separate. In summer, adults remain close to the edge of the continental shelf, which allows them access to open-water food supplies. Females carrying eggs move offshore to deep water to spawn, where the embryos sink. The embryos hatch into free-swimm...New ECCO 13 data emphasise vital importance of cervical cancer detection, treatment and prevention
...e revealed at ECCO. Overall, in this multi-ethnic, geographically diverse study population of 17,926 young women from Europe, Latin and North American and the Asia-Pacific region, with an average age of 20 years, abnormalities were identified in more than 1 in every 10 Pap smears. These findings underscore the pote...Dust storms may carry bacteria to Japan from China
... that dust storms in Asia can have implications in geographically remote countries. Previous studies have shown that dust storms in Northern China and Mongolia can cause myriad problems elsewhere, including respiratory problems, loss of livestock and crops and disruption of communication....Analysis of Katrina's health, environmental effects to be aided by website with layers of data
...r upon layer of different kinds of data that, when geographically correlated, could aid assessment of hazards and the process of recovery," she said. Miranda is an associate professor at Duke's Nicholas School of the Environment and Earth Sciences, and is a principal investigator and does GIS mapping for mercury at...Long sought-after flowering signal found
... information to determine when to flower, they are geographically limited in the area where they can be grown. Outside their normal range, they will often not flower at all, or will flower too early or too late in the year. Being able to control the flowering process better should help to breed new varieties that c...Other highlights in the July 6 JNCI
...ening and the observed detection rates in a large, geographically diverse population in which diagnostic follow-up was managed by community practitioners, the authors conclude that the PLCO trial results should approximate those that could be expected from a flexible sigmoidoscopy screening program targeting the ge......n in South Louisiana. There, they have remained, a geographically isolated population marrying and raising families for more than 200 years. Indeed, it is estimated that there are close to half a million Louisiana residents with Acadian blood. Much of the work on the Acadian genetics project began decades ago wit...Revueltosaurus skeleton unearthed at Petrified Forest upsets dinosaur tale
...s have claimed. "Sauropodomorphs and theropods are geographically widespread by the end of the Triassic, though the theropods at this time also were small and rare," Irmis said. "What we found suggests that ornithischian dinosaurs did not diversify and get large until the beginning of the Jurassic." "People have ar...Lactose intolerance linked to ancestral environment
...erous diseases negatively impact dairy herding and geographically restrict the availability of milk, and that humans have physiologically adapted to that," said evolutionary biologist Paul Sherman, a professor of neurobiology and behavior at Cornell. "This is a spectacular case of how cultural evolution -- in this ...Study: 'homemade' gene expression technology unreliable
...onth in the journal Nature Methods. They show that geographically separated multi-investigator teams adopting common commercial, rather than homemade, microarray platforms and common sets of procedures are able to generate comparable data. "The important point of the three papers is that with contemporary microarra...Small clades at the periphery of passerine morphological space
...mpetitive exclusion because they are marginal both geographically and ecologically. In this new study, which will appear in the June 2005 issue of The American Naturalist, Ricklefs shows that species in small clades tend to have extreme morphology, in particular relatively long toes, sometimes in contrast with shor...Ume researchers have mapped the dams of the world
...by dams. The largest and the most biologically and geographically diverse rivers are all affected. This is shown by ... and in the eight rivers that are biologically and geographically most diverse. The rivers in temperate forests and savannahs belong to the highest impact class, wher...Report proposes structure for national network of cord blood stem cell banks
...lood banks have achieved greater diversity through geographically targeted collection efforts and other means, the report notes....