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Tag: "influenced" at biology news

Genome sequencing is for ecologists, too

...s of how environments influence -- and how they're influenced by -- an organism's genetics. The animals are common in lakes and ponds and have been used to monitor the health of aquatic environments. Members of the species can reproduce both with and without sex, which has important implications in evolutionary...

Feinstein researchers identify intelligence gene

...ties, particularly intelligence, are significantly influenced by genetic factors. Existing data already suggests that dysbindin may influence cognition," said Katherine Burdick, PhD, the study's primary author. "We looked at several DNA sequence variations within the dysbindin gene and found one of them to be s...

New discovery: Molecular variation in one gene affects the growth of natural populations

...ulations dynamics in natural populations is mainly influenced by environmental factors and demography, that is birth rate, death rate and migration. Genetic variation and natural selection have been thought to have no direct effect on population growth or a weak effect at most. Scientists analysed hundreds o...

Key brain regulatory gene shows evolution in humans

...of exploring how the pressure of natural selection influenced evolution of other genes. They also said their finding demonstrates how evolution can act more efficiently to alter the regulatory segments, or "promoters," that determine genes' activity, rather than on the gene segment that determines the structur...

Looking for the genes that affect a person's level of response to alcohol

...s" the effects of alcohol is, in part, genetically influenced and relates to their risk for developing alcoholis...inked to LR. "The LR to alcohol is a genetically influenced phenotype, or measurable characteristic, that contributes toward the development of alcoholism," sai...

Fish evolve a longer lifespan by evolving a longer reproductive period, researchers find

.... As a result, the post-reproductive period is not influenced by natural selection. This result could be of interest to those who study menopause in humans and who have argued that post-reproductive humans can increase their own fitness by contributing to the fitness of their grandchildren and that the prolonge...

An essential regulator of body weight revealed

...searchers found that absence of these neurons only influenced eating behavior when they were removed from adult mice. If the neurons were eliminated in newborn mice, their developing brains found a way to compensate for the deficiency, and the mice grew up eating normally. The research, conducted by Serge Luque...

Baby's genes affect mom's cholesterol levels

... mothers' triglyceride and cholesterol levels were influenced to the same extent that they would be if the polymorphisms were present in the mothers. However, when both the mother and fetus expressed the same polymorphism, the results were not always as predicted. For example, a genetic variation that raises th...

Female butterflies go for sparkle -- not size -- when choosing to mate

...ize and pattern of males and then studied how they influenced female's mating decisions. "It's very easy to change the size, color composition and shape of these patterns, using artificial selection," said Monteiro. "The question then becomes, 'Why do these populations remain unchanged?' What are the selective...

Exercise aside, genes may ultimately dictate seniors' mobility

...ticipating in weight training. But genetic makeup influenced long-term physical function. Among exercisers, the...ound among non-exercisers, suggesting function was influenced by an interaction between exercise intensity and genetic make-up. In addition, seniors who reported...

Gaining ground in the race against antibiotic resistance

... inactivating cephalexin seven-fold. The mutations influenced the enzyme's active site, where the chopping of antibiotic molecules takes place. One of the mutations has already been found in nature, in a lactamase from Pseudomonas. In some cases, there is a tradeoff associated with antibiotic resistance: the b...

Vineyard weeds found to host Pierce's disease of grapes

...ents showed that environmental conditions strongly influenced how rapidly the bacteria multiplied within the plants. ...

Rodent social behavior encoded in junk DNA

...ircuits that have the receptors can be 'opened' or influenced by the hormone," added Hammock. "An animal's response to vasopressin thus depends upon which rooms have the locks and our research shows that the distribution of the receptors is determined by the length of the microsatellites." Prairie voles with t...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

...e to surface roughness. This roughness is strongly influenced by the local wind field so that the radar backscatter can be used in turn to measure the wind. So the Center for Southeastern Tropical Advanced Remote Sensing at the University of Miami used this ASAR image to calculate the speed of Hurricane Rit...

Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows

...y and DDT to as much as 60 times that of areas not influenced by seabird populations," says team member John Smol, a biology professor at Queen's University and Canada Research Chair in Environmental Change. The multidisciplinary study, led by Dr. Jules Blais, professor of environmental toxicology at the Unive...

Overbearing colored light may reveal a second mechanism by which birds interpret magnetic signals

...of European robins, a night-migrating species, was influenced by the intensity of light in the blue-green spectrum. In the present study, the Ritz and Wiltschko groups teamed up to analyze the orientation behavior under turquoise light in detail and revealed an unexpected phenomenon: Increasing the intensity ...

Stem Cells to Solve the Blood Shortage Problem?

...t assessment of how mangrove ecosystems might have influenced the tsunami's impacts on coastal communities. The research represents a collaborative effort, with participants from the Vrije Universiteit Brussel, Belgium; the University of Ruhuna, Sri Lanka; the Kenya Marine and Fisheries Research Institute; and...

Could better mangrove habitats have spared lives in the 2004 tsunami?

...t assessment of how mangrove ecosystems might have influenced the tsunami's impacts on coastal communities. The research represents a collaborative effort, with participants from the Vrije Universiteit Brussel, Belgium; the University of Ruhuna, Sri Lanka; the Kenya Marine and Fisheries Research Institute; and...

Depression gene may weaken mood-regulating circuit

...e degree of connectivity in this circuit, which is influenced by the serotonin transporter gene." Since serotonin activity plays a key role in wiring the brain's emotion processing circuitry during early development, the researchers propose that the short variant leads to stunted coupling in the circuit, a poo...

Climatologists discover deep-sea secret

...y's climate in Europe and North America is greatly influenced by the gulf stream. This ocean current carries warm water from the Gulf of Mexico northwards along the Florida coast, eastwards across the Atlantic and southwards along the west coast of Europe, bringing a mild climate. The strength of the current is...

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