Sentences with phrase «small human population»

Eradication of cats was possible for various reasons: firstly, it is an island with a very small human population and therefore with a low risk or re-introduction of cats; its size is small (26km2) which helps control and monitoring; and lastly, the vegetation is sparse, with many open areas.

These species were introduced by people at different stages in the island's human history and became invasive, negatively impacting wildlife populations and island food security for the small human population.

There is a small human population of growth hormone receptor loss of function mutants, people with Laron syndrome.

The arid Atacama Desert, thought to be a barrier to early South American settlers, may have held lakes large enough to sustain small human populations, according to new research.

>... the nineteenth - century rewarming trend which began with a much smaller human population and before the industrial revolution.

And even though the southern hemisphere is relatively less disturbed, and with a smaller human population, there have been signs of change.

Not exact matches

Finding a new flock of doubters is always possible, but the flock will necessarily be smaller — such is the distribution curve in human populations.

Sometimes the human genetic code changes and as a result, we see things happen that are small (in comparison to the population as a whole).

I believe that throughout most of our early human history, when our species population was still relatively small, you simply didn't see rampant homosexuality.

Genetic evidence offers impressive support for human evolution and also strongly suggests that our ancestral population has never been smaller than about 10,000, «Mitochondrial Eve» and «Y - chromosome Adam» notwithstanding.

That the world would be a better place if human population were smaller is a point on which I, as a Whiteheadian, strongly agree; so the issue is a different one.

The report, dubbed «Smaller, Safer, Fairer: A roadmap to closing Rikers Island,» lays out a plan to first reduce the current inmate population and then shutter the facility on the island between Queens and the Bronx that has been called a «black hole for human rights.»

«The initial dispersals out of Africa prior to 60,000 years ago were likely by small groups of foragers, and at least some of these early dispersals left low - level genetic traces in modern human populations.

Excoffier and his colleagues developed theoretical models predicting that if modern humans migrated as small bands, then the populations that broke off from their original African family should progressively accumulate slightly harmful mutations — a mutation load.

The researchers did a small study of existing genetic data from the human skin microbiome and estimate that 20 percent of the human population have S. epidermidis strains that make 6 - HAP on their skin, Gallo says.

«It is difficult to estimate the probability of a rare event using a small population, but given that around 500 chimpanzees have been born in captivity in Japan, the probability of this autosomal trisomy in chimpanzees may be comparable to that of trisomy 21 in humans, which occurs in up to 1 in 600 births,» speculates Hirata.

Recent finds suggest that the small population that gave rise to all humans alive today survived by exploiting a unique combination of resources along the southern coast of Africa

We don't need to use a cocktail of small molecules, growth factors or other supplements to create a population of bone cells from human pluripotent stem cells like induced pluripotent stem cells,» Varghese said.

And that, they say, supports the possibility that LB1 is a diseased member of a small - bodied modern human population.

Urbanisation is good for sustainability, because it reduces population growth and concentrates the overall human impact on the land in a smaller area.

But within days skeptics emerged, countering that the tiny remains instead belonged to a small - bodied population of modern humans and that LB1 — with her tiny brain and other odd features — was a diseased member of the group.

Rather than emerging from one small population, the human species likely evolved from a dispersed, complex network of groups that mixed and mated with each other, scientists report online September 20 in Science.

But chitemene gardening will maintain only a small population of human beings.

When the worms were healthy, they housed a large population of Bacteroides — a group of helpful, supportive, symbiotic bacteria — and a smaller population of Proteobacteria — a group that contains a number of dangerous human pathogens.

Funded by the National Zoological Gardens of South Africa, Rufford's Small Grants for Nature, and the National Geographic Society, Parusnath is developing and testing microsatellite markers similar to those used in human parentage tests to establish the genetic relatedness of Sungazers in different populations across the species» distribution.

Other human populations evolved from subsets of that diverse population, as small groups migrated around the globe just a few tens of thousands of years ago.

A combination of increasing human population density, better hunting methods and climate change may have reduced the availability of prey and pushed some wolves towards scavenging, which favoured tameness and smaller size.

The first changes to the human genome, Harris believes, will happen within small test populations.

The scientists estimate that these gene variations were able to persist in Neanderthals because Neanderthals had a much smaller population size than humans.

Although nuclear fission, photovoltaics, wind, and water now meet a small portion of the world population's energy needs, humans today get most of our energy the same way the cave people did: directly from the sun or from fire.

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.

Researchers studied the Cayman reefs, which are 80 miles south of Cuba and surrounded by deep ocean water, in part because of their remoteness and negligible impact from a small nearby human population, Frazer said.

Or are these remains simply a population of small - bodied humans (Homo sapiens), like ourselves, but with one or more individuals suffering from a developmental disorder?

He found higher rates of nest predation in small woodlots near human communities because these areas had higher populations of raccoons (Procyon lotor) and squirrels (Sciurus spp.) and few, if any, large predators, such as cougars and bobcats (Lynx rufus).

Ultimately, Falk and Hildebolt found that people living in small - scale societies are not inherently more violent that those living in «civilized» states, and that war deaths scale similarly with population sizes across all levels of human society.

With its small population, high costs, and continued dependence on human intervention, the California condor would probably not make Possingham's priority list.

Some researchers have suggested that the small population is due to recent human activity, but the new analysis suggests «it's a long - term thing,» Scally says.

Humans are all so closely related that our entire population shows less genetic diversity than that of a small group of chimpanzees.

Preliminary work already indicates that a small population of CD117 cells exists in the human prostate.

This work illustrates how the study of inbred canine populations can provide new insights into the genetic underpinnings of complex disease, bridging the gap between small rodent models and humans.

If the migration from Indonesia to Madagascar was «a limited event» which brought only a small number of colonizers in a few voyages, then why does the human population of the island have such a high diversity of maternal and paternal lineages with Indonesian origin?

Co-author Heidi Parker, a geneticist at NHGRI, says that because humans initially bred dogs for specific traits — say, smaller body size or calm temperament — selection created a population «bottleneck» that narrowed the genetic variation in offspring, leaving them with just a few specific clusters of variable genetic regions.

The population of any given animal among the five million or so species on the planet is, on average, 28 percent smaller, thanks to humans.

The team confirms that the Denisovans interbred with the ancestors of some living humans and found that Denisovans had little genetic diversity, suggesting that their small population waned further as populations of modern humans expanded.

The small population that gave rise to all humans alive today may have survived by exploiting a unique combination of resources along the southern coast of Africa

«This study illustrates that there is a lot to be gained in human genetics by looking into small, isolated populations.»

The «Out of Africa» hypothesis posits that modern humans evolved from a small population in Africa and replaced all other hominin populations, including Neandertals, as they migrated into Europe and Asia.

Compared with fishes, frogs, reptiles, and birds, some of which can regrow entire brain structures, he says, «it is interesting that neuronal turnover in humans is limited to a single population of neurons in only one relatively small structure, and it is worthwhile to examine why it persists.»

The team speculates that detrimental mutations have survived in humans and chimps because these species have had much smaller breeding populations than rodents throughout evolution.

This species is characterized by body mass and stature similar to small - bodied human populations but a small endocranial volume similar to australopiths.