Sentences with phrase «isolated populations in»

Horned Guan lives in isolated populations in cloudforests on the highest mountain peaks and volcanoes in Guatemala and the neighboring Mexican state of Chiapas.

Two asthma genes, identified in isolated populations in Finland and Quebec, may provide clues to this boy's illness.

Most scientists believe a small and isolated population in Africa must have been infected with HIV decades or even centuries ago.

Moreover, the demography of the Ashkenazi population, the largest isolated population in the U.S., enables large - scale recruitment of study patients and hence more genetic discoveries than in other well - known isolated populations like the Amish and Hutterites locally, or the Icelanders overseas.

The introduction of eight female Texan panthers to an isolated population in Florida may have saved the animals from extinction and improved their genetic health, scientists say.

Not exact matches

«Since the late 80s... the number of people who say they feel isolated has doubled if not trebled, according to population surveys in Europe, the US and Australia.»

As described in this 2015 YouTube video (embedded below), a low social credit score is meant to isolate unruly citizens from the rest of the population and deny them access to state services and benefits via travel bans, increased prices for day - to - day products, higher bank interests, and others.

Change can also occur due to accidental loss of alleles (genetic drift) in small isolated populations.

The effort that is expended in segregating, isolating, and discriminating large segments of the population would be better spent dealing with things like decent education, housing and medical care for ALL.

For the most part the persecution seems to have taken the form of the enmity of the surrounding population finding vent in isolated cases of violence.

The inclusion of isolated population segments into the dominant economy created permanent disruptions in the moral economy of rural life — social upheavals that generated potential recruits for sectarian movements.

Economic expansion in this core was associated with two other dominant trends: growth in population (the so - called demographic transition, which both facilitated, and was facilitated by, industrialization) and the geographic inclusion of previously isolated, local, and ethnic sectors of the population into the commercial and industrial labor force.

It happens over generations as later generations stay in many ways quite similar but in certain respects become rather different from earlier generations, especially in small, isolated populations facing novel selection pressures.

Those neighborhoods have only become more challenged in the last few decades as the population that remains has become more isolated from the rest of Chicago.

The Andromeda Galaxy is easily visible to the naked eye in a moderately dark sky, though such a sky is available only in smaller towns and isolated areas reasonably far from population centers and sources of light pollution.

In contrast, some languages with large populations of speakers, such as Mandarin, Hindi, and Arabic, are relatively isolated in these networkIn contrast, some languages with large populations of speakers, such as Mandarin, Hindi, and Arabic, are relatively isolated in these networkin these networks.

Though wolves are on the upswing in these regions, their populations are likely too isolated to control the pervasive coyote and other small predators.

This massive environmental change is believed to have created population bottlenecks in the various species that existed at the time; this in turn accelerated differentiation of the isolated human populations, eventually leading to the extinction of all the other human species except for the branch that became modern humans.

This explains how the Asian bush mosquito has not only spread inland but can also be found in isolated populations.

The search for the gene began in Finland, whose isolated population has often been studied for its elevated rate of rare genetic diseases.

The natural world was a continuum, he concluded, with isolated populations perpetually in the process of becoming species in their own right.

Local involvement in, and support for, wildlife research is particularly important in the event that isolated or threatened populations are identified, as resulting management decisions could directly impact their lives.

«We were really surprised to see that the levels of resistance of the individual isolates were considerably lower than the population as a whole,» explains Collins, who published his results recently in Nature.

In some situations, like war, it may be good to have an isolated population of young males.

«Small populations in isolated patches can be easily lost and, in a warmer climate, could simply die out,» she warns, adding that Southern Appalachia trout fishing may become «heavily managed.»

However, other populations in the region that lack such genetic diversity and are unable to adapt to the harsher conditions could become isolated if they can not fly to more climatically suitable areas because the landscape in between is unsuitable.

«It is this culture that isolates whales, leading to genetic differentiation — and ultimately, the five distinct populations identified in the North Pacific.»

Specifically, Toni Gabaldón's group at the Centre for Genomic Regulation in Barcelona has compared the Iberian lynx genome with those of other species, attempting to identify genes that have lost their function because they have remained isolated and the existence of a small population of specimens of this species.

By 35,000 years ago, H. sapiens appears to have had the planet to itself, with the possible exception of an isolated population of H. floresiensis — the «hobbit» people of Southeast Asia — and another newly discovered hominid species in China.

This genetic deterioration is especially marked in the Doñana population - smaller, and isolated for a longer period - which has half the genetic diversity of the Sierra Morena group.

In the traditional scenario for speciation, a population of animals becomes isolated from others of its kind, say by being blown onto a far - off desert island like one of the Galápagos.

In 2001, a team of scientists visiting Ball's Pyramid, an isolated rock spire off Lord Howe Island in the Tasman Sea, discovered the world's rarest invertebrate: an apparent relict population of two dozen Lord Howe Island stick insects (Dryococelus australisIn 2001, a team of scientists visiting Ball's Pyramid, an isolated rock spire off Lord Howe Island in the Tasman Sea, discovered the world's rarest invertebrate: an apparent relict population of two dozen Lord Howe Island stick insects (Dryococelus australisin the Tasman Sea, discovered the world's rarest invertebrate: an apparent relict population of two dozen Lord Howe Island stick insects (Dryococelus australis).

Rogers believes that there wasn't time for the three populations to have become fully reproduc - tively isolated in this time, so they were able to interbreed.

Later, in the 1990s, researchers turned up a small set of isolated, inbred populations scattered over a wide region.

The work also underscores a relatively new way to uncover a single factor's influence on disease: by isolating it genetically in a large population.

As Finnish geneticist Leena Peltonen wrote in a recent review, «The enthusiasm regarding the use of population isolates for the identification of predisposing genes for common, polygenic diseases has turned to a silent drudgery.»

The most famous form of this species definition may be from evolutionary biologist Ernst Mayr, who wrote in 1942: «Species are groups of actually or potentially interbreeding natural populations, which are reproductively isolated from other such groups.»

An international team of researchers have shown that vulnerable coral populations in the eastern tropical Pacific have been completely isolated from the rest of the Pacific Ocean for at least the past two decades.

The use of cell surface markers to isolate specific cell populations is one common method for separating cells; however, isolating live cells based on their RNA expression is a powerful new way enabling the study of small cell niches in nongenetically modified animal models and human tissue.

These occur in geographically isolated populations descended from early pastoralists who lived in different parts of Africa and Eurasia.

The study is «a beautiful example of the use of isolated populations to study human genetic disease,» observes geneticist Val Sheffield of the University of Iowa in Iowa City, but he cautions that it's premature to talk about a cure for the disease.

The genetic data indicates that the Ashkenazi Jewish population was founded in the late medieval times by a small number, effectively only hundreds of individuals, whose descendants expanded rapidly while remaining mostly isolated genetically.

A date would also illuminate whether the fossils represent an ancient population or an isolated relic that persisted until fairly recently, says paleoanthropologist Bernard Wood of George Washington University in Washington, D.C.

«Playback experiments between geographically isolated taxa provide key data on how populations might perceive each other in terms of «same» or «different» if they were in actual contact,» according to Louisiana State University's J.V. Remsen, an expert on Neotropical birds who was not involved in the research.

As Hudson Pinheiro, a researcher from the Department of Oceanography and Ecology at the Federal University of Espírito Santo in Brazil, explains: «Populations of this new species have been isolated in the archipelago for a long time due to the distance from the coast, and have developed clear differences in comparison with other «sibling» species living on the continental margin.»

For thousands of years our ancestors lived in small, isolated populations, leaving them severely inbred, according to a new genetic analysis.

Konstanz evolutionary biologists working with Prof. Axel Meyer have now described parallel evolution of two closely related, but geographically isolated populations of cichlid fish in Nicaraguan crater lakes.

I just started working on my Ph.D. in engineering in a town with a very small minority population, and I feel extremely isolated and alone.

But there is a possible upside for condor conservation in the results of this study — D'Elia and his colleagues did not find any evidence that the now - vanished Pacific Northwest population was genetically isolated from the condors in California.

«In terms of practical nature conservation, these results signify that in the future it will no longer be sufficient to preserve small, isolated reserves — while these benefit specialized species with a simple genetic structure, the bulk of species that depend on an exchange between local populations will lose out in the medium to long term,» predicts Schmitt, and he adds in closing, «This will lead to a further decline of numerous insect species — with dramatic consequences for entire food webs and ecosystems.&raquIn terms of practical nature conservation, these results signify that in the future it will no longer be sufficient to preserve small, isolated reserves — while these benefit specialized species with a simple genetic structure, the bulk of species that depend on an exchange between local populations will lose out in the medium to long term,» predicts Schmitt, and he adds in closing, «This will lead to a further decline of numerous insect species — with dramatic consequences for entire food webs and ecosystems.&raquin the future it will no longer be sufficient to preserve small, isolated reserves — while these benefit specialized species with a simple genetic structure, the bulk of species that depend on an exchange between local populations will lose out in the medium to long term,» predicts Schmitt, and he adds in closing, «This will lead to a further decline of numerous insect species — with dramatic consequences for entire food webs and ecosystems.&raquin the medium to long term,» predicts Schmitt, and he adds in closing, «This will lead to a further decline of numerous insect species — with dramatic consequences for entire food webs and ecosystems.&raquin closing, «This will lead to a further decline of numerous insect species — with dramatic consequences for entire food webs and ecosystems.»