Sentences with phrase «island populations»

But between roughly 10,000 and 20,000 years ago, all except a few isolated island populations disappeared.
And it might even show how the practice may have been transferred between different island populations.
The amount of within - population variation is lowest for the smallest island populations and highest for the mainland population.
They spend several classes introducing the concept of natural selection, giving examples of different island populations of lizards adapting to their new environments, and learn to build phylogenetic trees using the physical features of the lizards, and then analyze DNA sequences from the lizards.
A comparison in indices of sea otter health and condition between the declining southwest population in Alaska and the stable Commander Island population in Russia in 2004 - 05.
While multiple studies on Pacific Island populations who get 30 - 60 percent of their total caloric intake from fully saturated coconut oil have all shown nearly non-existent rates of cardiovascular disease.
Vulnerability of many island populations is also increasing due to climate change impacts.
Swedish and Norwegian researchers have studied island populations of a hybrid species, the Italian sparrow (Passer italiae) from Crete, Corsica, Sicily and Malta.
It's a cautionary tale about the vulnerability of island populations today.
We have ongoing bio-geography studies in the Philippines that look at live animals to see how the complexity of island populations evolves.
«By comparison, the Stewart Island populations have experienced a relatively stable history,» Dr Rawlence says.
Most mammoths went extinct about 11,500 years ago, but some isolated Arctic island populations of woolly mammoth persisted until 4,000 years ago.
Small island populations persisted until about 3,700 years ago before the species finally disappeared.
The increase in animals killed — at least 1500 pantropical spotted dolphins, 159 spinner dolphins, and 15 bottlenose dolphins in 2013 — raises concerns about these small and genetically unique island populations and the animals» welfare, the scientists say.
They analyzed 15 different locations in the birds» DNA and found that it's likely that the Kapiti Island population, which at some 1200 birds is by far the biggest, is losing some of its precious genetic variation with every generation, for reasons that are unclear.
And although there is no direct evidence — like cut marks on monkey bones or monkey bones found in trash heaps — of humans hunting the monkeys for food, Cooke says that in addition to hunting, the clearing of land for farming and the introduction of invasive species can all put a deadly strain on native island populations, which are adapted to a very specific environment and have nowhere else to go.
(Ecologists have found that island populations close to continents are more easily replenished, while more distant populations more easily go extinct.)
138/6: 45 Whole genome sequencing increase the power to detect trait - associated rare variants shifted towards high frequencies in the Sardinian island population.
Therefore, the future status of the Sea Lion Island population could have a significant role in the conservation of the entire Falklands population.
Although some populations (principally the Farallon Islands population) have suffered steep declines since the early 1970's, the species is still numerous overall.
As European colonists began to settle along the coast, introducing new economic enterprises, exploiting the marine resources, and establishing Catholic missions, the native food sources were depleted, native economies were altered, and island populations declined even further.
While pups like these are helping increase the various island populations, they are still
A brown phase, with the grey and black fur of the body replaced by a sandy brown and a deeper brown, may occur in the San Clemente Island and San Nicolas Island populations.
[2] The inland, coastal, and Santa Cruz island populations of the (former) western scrub jay are now considered three distinct species, namely Woodhouse's, the California and the island scrub jays.
The Santa Catalina Island population is estimated at around 1,800 foxes; however disease remains an ongoing threat to this subspecies.
The fire also melted one of McGinnes's utility trucks and caused rolling blackouts at the height of the summer tourism season, when the Block Island population balloons past 20,000.
Future freshwater stress has important implications for vulnerable island populations, who must rely on climate adaptation scenarios for agricultural practices and seasonal water management.
If anything, the problems have only grown more complex and fundamental — there's now a growing island population that must learn to live sustainably with severely limited resources, and a bevy of threats from other invasive species remain at large.
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While retirement resettlement has been a major boost to the Vancouver Island population, it has slowed since 2008, says Holmes.
Dr Fry's team studied the venom of 16 tiger snake populations from across Australia including five island populations in the Bass Strait, and venoms from 11 other snakes in related genera.
Did you know that multiple studies on Pacific Island populations, who get 30 - 60 % of their total caloric intact from fully saturated coconut oil, have all shown nearly non-existent rates of cardiovascular disease?
Graham adds: «This research suggests that many island populations, not just in the Bering Strait but throughout the world, could be jeopardized by coming climate change.»
Aggregate predation figures, such as those routinely used by the ABC (as well as the U.S. Fish and Wildlife Service, and others), can typically be traced to small — often flawed — studies, the results of which are subsequently extrapolated from one habitat to another, conflating island populations (where the presence of cats can have dire consequences) and those on continents, combining common and rare bird species and so forth.
Like any small, isolated island populations, the island fox remains extremely vulnerable to any catastrophic mortality source, be it predation, canine disease, or environmental extremes (1).
It was an example of how, under the right conditions, an island population could shift almost entirely away from fossil fuels.
Here was an island population of dingoes which experts claimed were the least contaminated of their kind by cross-breeding with domestic dogs.
The study also shows that dispersing males connect the enigmatic brown bear population of the Alaskan ABC - islands to the North American mainland, and that the resulting movement of genes is substantial enough to maintain high genetic variability within this island population.
There are island populations that have allowed the discovery of recessive mutations that are rare in most of the world, but happen to be more common on a given island.)
The study revealed no size difference between mainland and island populations.
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