Sexual competition drives evolution of a sex-related gene
... a competitive marketplace. In such a marketplace, competitors have to constantly change their products to make them better, to give them an edge over their rivals -- whereas, in a monopoly, there's no incentive to change." The finding constitutes the first specific evidence that different levels of sexual comp...Linking empires, economics, evolution
...urces and the disproportionate success of stronger competitors drive both economic and evolutionary change. Human history and the history of life move in the same general direction: toward larger, more powerful actors that dominate their environment and its resources. But these large, dominant groups are also mo...Hummingbirds lose power at high altitudes
...power for the bursts of flight needed to chase off competitors or escape from predators, said researchers from the University of California, Berkeley, and the California Institute of Technology. "The costs of hovering flight are the same across elevations because hummingbirds compensate by having larger wings...Violent ocean motion no magic potion for reefs
... predators, unlike native species, they are fierce competitors that will likely have a significant edge over native species as reef recovery progresses. During the surveys, the team takes video transects of reefs for later analysis to determine what macroalgae and other organisms are present and in what abundan...FDA approves ABRAXANE(TM) for metastatic breast cancer
...ct of patents and other proprietary rights held by competitors and other third parties. Additional relevant information concerning risks can be found in the Company's Form 10-K for the year ended December 31, 2003 and other documents filed by the Company with the Securities and Exchange Commission. The forward-...New research shows in the animal world, it pays to be an imposter
...hly successful in tricking their often larger male competitors and fertilizing the female's eggs. While the sexual mimicry that the cuttlefish employ has been widely reported in nature, this is the first time fertilization success in an animal using this strategy has been documented. Hanlon and his colleagues st...Heart specialists call for cardiovascular screening for all young competitive athletes
... half times higher risk of sudden death. The young competitors who died suddenly were affected by silent cardiovascular diseases, predominantly cardiomyopathies, premature coronary artery disease and congenital coronary anomalies." He said it was not sport that directly caused the deaths, but rather that it trig...Virginia Tech patents advance microprocessors, vaccines, vision, vibration control, more
...he market place. We will be able to interest their competitors with the evidence of market acceptance." CPES, for...veloped into products. "It was a hurdle for these competitors to share in a research program, but we convinced them that we are not doing product development, but...Rhesus monkeys can assess the visual perspective of others when competing for food
...atform by his feet. In each experiment, one of the competitors could see the monkey in front of them, but the oth...ould not. For example, in Experiment 1, one of the competitors stood with his back to the monkey subject, while the other stood facing the subject. Monkeys in this...Changes in community size affect the outcome of competition
...so many organisms coexist when some must be better competitors than others? In a study to be published in the Jul... play a role in coexistence because, although poor competitors generally lose, they may occasionally get lucky. Using theory developed for population genetics, th...Study in Royal Society journal on world's only horned rodent
..., differentiate between knowledgeable and ignorant competitors by Thomas Bugnyar, Bernd Heinrich (rspb.2005.3144) We here tested whether ravens treat competitors according to their possible knowledge about the location of food. Birds were confronted with conspec...Prevalence of infection in a population can shape parasite virulence
... V therefore depend on the infection status of the competitors and for an infected mosquito, at least, you stand a better chance of getting your wings and leaving the natal lagoon if more of your larval neighbors are infected too. To study the interplay between parasitism and intraspecific competition, Bedho...Research finds a mechanistic explanation for global patterns of liana abundance and distribution
...nd thus grow during seasonal droughts, while their competitors remain mostly dormant. This capacity for dry season growth gives lianas a competitive advantage that, over many decades, may result in higher abundance of lianas in seasonal tropical forests. In aseasonal wet forests, however, this competitive advant...Happy and passive means more productive animals
...ring only that computer programs be used to define competitors and set up breeding and growth groups, Muir said. "This will enhance production traits that are influenced by associative effects while also improving animal well-being, which leads to a successful situation for producers, consumers and animals," he ...Fungus helps tall fescue choke out native plants
...Rudgers plans to see how tall fescue fares against competitors under drought and non-drought conditions, and she also plans to study symbiotic relationships in native grasses, including some Texas species....Advancing saltwater fish farming
...d enable U.S. fish farmers to compete with foreign competitors to reduce our country's $8 billion seafood trade deficit. Daniel Benetti is Chairman of Marine Affairs and Policies, and Director of Aquaculture at the University of Miami's Rosenstiel School of Marine and Atmospheric Science. He will discuss researc...Multi-million dollar deal to benefit medical research
...ists from MRC and Scripps Research were scientific competitors in earlier years, they pooled their inventions in Cambridge Antibody Technology to facilitate exploitation of the technology for creation of new medicines....Increased sexual competition among flowering plants in biodiversity hotspots may lead to extinctions
...versity hotspots may be continually faced with new competitors and simply cannot evolve as rapidly as their environment changes. If this is true, then pollen limitation may be a chronic problem for species in biodiversity hotspots a challenge with which they have coped for millions of years. "The pattern raises...Scientists discuss evolutionary roots of social behavior
...alliances may have evolved as a means to stave off competitors for resources or mates. A more recent theory however, suggests that social systems - including "positive" behaviors such as cooperation and interdependency - might have arisen as a kind of group defense mechanism against predators. The "social-living...Biological diversity and human health; Rapid autopsy program; Snake bites and more
... areas, are too small to support the predators and competitors that typically keep mouse numbers down. The loss of species diversity means that the risk to humans of Lyme disease is high in small patches of forest. Dobson and colleagues give other examples of how loss of biological diversity threatens human he...