The regular raids by German personnel hunting for radios further alienated the occupied civilian populations. |
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Some jellyfish populations have become restricted to coastal saltwater lakes, such as Jellyfish Lake in Palau. |
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This combination of hermaphroditism and early reproduction enables small populations to grow at an explosive rate. |
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These features make ctenophores capable of increasing their populations very quickly. |
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Some jellyfish and turtles eat large quantities of ctenophores, and jellyfish may temporarily wipe out ctenophore populations. |
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In the open ocean, many sinking cells are lost to the deep, but refuge populations can persist near the thermocline. |
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Their populations are distributed depending on temperature, salinity, or depth. |
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The three major, genetically distinct populations occur in the Atlantic, eastern Pacific, and western Pacific Oceans. |
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Due to their obligate feeding nature, leatherbacks help control jellyfish populations. |
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They are also a major jellyfish predator, which helps keep populations in check. |
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The Seri people have noticed the drastic decline in turtle populations over the years and created a conservation movement to help this. |
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The report noted significant declines in the Mexican, Costa Rican, and Malaysian populations. |
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With leatherback populations declining more quickly than any other large animal in modern history, each turtle is precious. |
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Darwin argued that it was populations that evolved, not individuals, by natural selection from naturally occurring variation among individuals. |
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A cladistic species is the smallest group of populations that can be distinguished by a unique set of morphological or genetic traits. |
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A genetic species as defined by Robert Baker and Robert Bradley is a set of genetically isolated interbreeding populations. |
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The evolutionary process by which biological populations evolve to become distinct species is called speciation. |
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It is usually lightly colored, although in the eastern Pacific populations parts of the carapace can be almost black. |
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Other authorities claim that the two populations are phenotypically distinct and treat the East Pacific form as a full species. |
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The largest populations of green sea turtles within the United States coastline are in the Hawaiian Islands and Florida. |
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Globally, the largest populations of sea turtles are in the Great Barrier Reef in Australia and the Caribbean islands. |
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A few populations practice polyandry, although this does not seem to benefit hatchlings. |
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In 2001, Nicholas Mrosovsky filed a delisting petition, claiming some green turtle populations were large, stable and in some cases, increasing. |
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The migrating birds bypass the latitudes where other populations may be sedentary, where suitable wintering habitats may already be occupied. |
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Other human factors have led to declines and even extinctions in seabird populations, colonies and species. |
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Oil pollution threatens species with restricted ranges or already depressed populations. |
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Typical interbirth interval ranges from one year for the Black Sea population to three years for eastern Pacific Ocean populations. |
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Moderate levels of metal pollutants, which are thought to negatively impact dolphin health, have been measured in some populations. |
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In Australia, two main migratory populations were identified, off the west and east coasts. |
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The four global populations are North Pacific, Atlantic, Southern Ocean and Indian Ocean populations. |
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These two populations are distinct, with only a few females in each generation crossing between the two groups. |
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Origins of whales occurring at Maldives are not clear either from Arabian or south Pacific populations, and overlaps are possible. |
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This, along with hunting in the Antarctic Ocean beginning in 1904, sharply reduced whale populations. |
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A brief change in food availability can affect right whale populations for years after. |
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In 2001, after the zooplankton populations greatly recovered, 30 calves were born. |
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In that sense, petroleum use may be said to have protected whale populations from even greater exploitation. |
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Killer whales have a diverse diet, although individual populations often specialize in particular types of prey. |
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Other populations have not been as well studied, although specialized fish and mammal eating killer whales have been distinguished elsewhere. |
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Advanced methods that sequenced the entire mitochondrial genome revealed systematic differences in DNA between different populations. |
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Distinct populations may also exist off the west coast of tropical Africa, and Papua New Guinea. |
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However, different populations or ecotypes may specialize and some can have a dramatic impact on certain prey species. |
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Some populations in the Norwegian and Greenland sea specialize in herring and follow that fish's autumnal migration to the Norwegian coast. |
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Depletion of specific prey species in an area is, therefore, cause for concern for local populations, despite the high diversity of prey. |
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On the west coast of Alaska and the Aleutian Islands, seal and sea lion populations have also substantially declined. |
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The spill damaged salmon and other prey populations, which in turn damaged local killer whales. |
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Some populations, such as in Alaska's Prince William Sound, may have been reduced significantly by whalers shooting them in retaliation. |
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Breeding occurs in California from March to May, pupping between April and May, depending on local populations. |
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Large populations move with the season down the West Coast of Canada and may winter on the islands in Washington and Oregon. |
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The 2007 law seeks to relieve pressure on the crashing Pacific Northwest salmon populations. |
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Although these are constants, they are associated with the statistical behavior of populations of atoms. |
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The oceans have a tremendous amount of energy and are close to many if not most concentrated populations. |
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However, northern and southern populations become genetically separated over time. |
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Most hunted whales are now threatened, with some great whale populations exploited to the brink of extinction. |
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Typical interbirth interval ranges from 1 year for the Black Sea population to 3 years for eastern Pacific Ocean populations. |
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Many were also the target for commercial industry, leading to a sharp decline in all populations of exploited species, such as whales and seals. |
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Marine mammals also get entangled in aquaculture nets, however, these are rare events and not prevalent enough to impact populations. |
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Because of significant recent immigration, Italy has sizeable populations whose native language is not Italian. |
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As in Argentina and Brazil, these populations are today overwhelmingly Spanish speaking, and German as a home language is in heavy decline. |
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Substantial populations descended from Spanish colonists and immigrants exist in other parts of the world, most notably in Latin America. |
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Spain has a number of descendants of populations from former colonies, especially Latin America and North Africa. |
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This represented one of the largest movements of European populations to their colonies in the Americas during colonial times. |
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Genetic studies show Portuguese populations not to be significantly different from other European populations. |
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An inherent problem with quotas is that fish populations vary from year to year. |
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In general, depleted populations of cod and other gadids appear to recover poorly when fishing pressure is reduced or stopped. |
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The accidental or intentional introduction of species by humans has the potential to negatively impact native oyster populations. |
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Oysters are subject to various diseases which can reduce harvests and severely deplete local populations. |
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Birdwatchers may take part in censuses of bird populations and migratory patterns which are sometimes specific to individual species. |
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The harp seal population is found in three separate populations, each of which uses a specific breeding site. |
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All 3 populations are hunted commercially, mainly by Canada, Norway, Russia and Greenland. |
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Seal strandings are not considered a large threat to Hooded Seal populations but are highly researched. |
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Climate change is potentially the most serious threat to ringed seal populations since much of their habitat is dependent upon pack ice. |
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Continuously submerged populations in the Baltic Sea are very responsive to turbulent conditions. |
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Due to this, the species composition of algal populations may shift in the presence of chemical pollutants. |
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Most species' populations are more or less stable, although three are classified by the IUCN as being at risk. |
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There is also a noticeable decline in sturgeon populations as the demand for caviar increases. |
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In Alaska, foxes were introduced to many islands to create new populations for the fur trade. |
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On mainland Britain, it has almost entirely displaced the populations of native red squirrels. |
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The net effect of fishing practices on global coral reef populations is suggested by many scientists to be alarmingly high. |
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One proposed solution to eutrophication in estuaries is to restore shellfish populations, such as oysters and mussels. |
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There is data from the United States that shows a correlation between human populations and threatened and endangered species. |
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It has substantially increased the populations of the southern black rhinoceros and southern white rhinoceros. |
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Divers have been used to assess the fish populations surrounding the platforms. |
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Unlike fishing, aquaculture, also known as aquafarming, is the cultivation of aquatic populations under controlled conditions. |
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Reclamation projects have strong negative impacts on coastal populations, although some species can take advantage of the newly created area. |
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Rising populations meant increasing land values, especially for small tenancies. |
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Cherbourg and Octeville have seen their populations quadruple in a century. |
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Danish settlers cleared their own land to farm it, and there was no segregation of populations. |
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Being sold into slavery was a common fate of populations conquered in wars. |
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John Hickman identifies thirteen reasons why occupied populations might hold collaborators in contempt. |
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Even without having a mandate from the Geneva Conventions, the ICRC tried to ameliorate the suffering of civil populations. |
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These groups moved little until the close of the 18th century, when their populations were sharply reduced by smallpox and other epidemics. |
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This high frequency may suggest some gene flow between ancestral human and Neanderthal populations due to mating between the two. |
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Accordingly, wild populations of blackbuck antelope, gemsbok, and nilgai may be found in Texas. |
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Alpine meadows are the typical habitat in the Himalayan and Tibetan populations of brown bear. |
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The lifespan of brown bears of both sexes within minimally hunted populations is estimated at an average of 25 years. |
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Even in populations living in protected areas, humans are still the leading cause of mortality for brown bears. |
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Roots and bulbs become critical in autumn for some inland bear populations if fruit crops are poor. |
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It is likely that humans have caused the extinction and fragmentation of bear populations and their habitats since prehistorical times. |
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The occurrence of eutrophication in bodies of water is another effect large urban populations have on the environment. |
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High rat populations in the UK are often attributed to the mild climate, which allow them higher survival rates during the winter. |
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The ancestral species was likely smaller than the current one, as the earliest red fox fossils are smaller than modern populations. |
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In areas in North America where red fox and coyote populations are sympatric, fox ranges tend to be located outside coyote territories. |
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It is likely then that Sardinian fox populations stem from repeated introductions of animals from different localities in the Mediterranean. |
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After the English Civil War caused a drop in deer populations, fox hunting grew in popularity. |
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Rabbit populations seem to be greatest in ecotone habitats and less in scrublands or grasslands. |
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However, populations have been declining in mainland Europe since the 1960s, at least partly due to changes in farming practices. |
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It has been speculated that in the Near East, hare populations are intergrading and experiencing gene flow. |
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Genetic diversity in current populations is high with no signs of inbreeding. |
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Gene flow appears to be biased towards males, but overall populations are matrilineally structured. |
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It is however possible that restricted gene flow could reduce genetic diversity within populations that become isolated. |
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While populations are currently stable across much of its range, it is thought to be declining severely in Great Britain. |
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In areas with medium to high badger populations, dispersal from the natal group is uncommon, though badgers may temporarily visit other colonies. |
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This is because it is a relatively common species with a wide range and populations are generally stable. |
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The other in southern France may be connected via the Pyrenees to populations in Spain and Portugal. |
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A severe reduction of rabbit populations due to myxomatosis has hastened the wildcat's decline. |
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However, adequate forest or brush cover must still be provided for populations to grow and thrive. |
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However, many national parks and protected reserves in Europe do have populations of red deer, roe deer, and fallow deer. |
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In 2005, the Rhodian fallow deer was found to be genetically distinct from all other populations and to be of urgent conservation concern. |
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Serious genetic pollution has occurred in many populations, especially in China. |
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Many introduced populations are from Japan, so they also lack significant spots. |
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Small populations might exist in North Korea, but the political situation makes investigation impossible. |
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Some of these are in isolated areas, for example on the island of Lundy, but others are contiguous with populations of the native red deer. |
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There are also several successful cases of the establishment of new populations of heath fritillary. |
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Nevertheless, coyote genetic markers have been found in some wild isolated gray wolf populations in the southern United States. |
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Pups are usually born in spring, coinciding with a corresponding increase in prey populations. |
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However, Eastern European wolf populations were reduced to very low numbers by the late nineteenth century. |
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Furthermore, the decline in the moose populations has reduced the wolf's food supply. |
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In the east, its range overlaps with populations in Lithuania, Belarus, Ukraine, and Slovakia. |
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Soviet wolf populations reached a low around 1970, disappearing over much of European Russia. |
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Wolf populations in northern inner Mongolia declined during the 1940s, primarily because of poaching of gazelles, the wolf's main prey. |
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Wolves living in the southern Negev desert are contiguous with populations living in the Egyptian Sinai and Jordan. |
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The decline of North American wolf populations coincided with increasing human populations and the expansion of agriculture. |
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Although lyme disease can debilitate individual wolves, it does not appear to have any significant effect on wolf populations. |
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Wolves kill dogs on occasion, with some wolf populations relying on dogs as an important food source. |
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In Croatia, wolves kill more dogs than sheep, and wolves in Russia appear to limit stray dog populations. |
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It is resident in much of its range, but some populations from the more northern parts migrate southwards in autumn. |
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Escaped domestic pigeons have raised the populations of feral pigeons around the world. |
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In North America, house sparrow populations are more differentiated than those in Europe. |
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Unlike the birds in sedentary populations that migrate, birds of migratory subspecies prepare for migration by putting on weight. |
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Accipiters and the merlin in particular are major predators, though cats are likely to have a greater impact on house sparrow populations. |
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A few records indicate disease extirpating house sparrow populations, especially from Scottish islands, but this seems to be rare. |
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Today, the largest variety of color patterns is found where the western and eastern populations mix, as is to be expected. |
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Loss of habitat and the effect of these diseases has caused the decline of populations across Europe in recent years. |
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The common toad reaches maturity at three to seven years old but there is great variability between populations. |
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An estimate was made of the significance of roadkill in toad populations in the Netherlands. |
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Chytrid fungus has decimated frog populations worldwide, and caused extinctions and widespread declines in Australian frogs. |
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There are naturalised populations occurring from Connecticut to Michigan, and it is probable that they occur elsewhere. |
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Genetic diversity can in particular be detected when looking at how the populations respond to climatic conditions. |
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Toothfish are commercially fished, and overfishing has reduced toothfish populations. |
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The data indicate that the individual was closely related to present North American Native American populations. |
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Today many Pipil and other indigenous populations live in the many small towns of El Salvador like Izalco, Panchimalco, Sacacoyo, and Nahuizalco. |
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The common occurrence of the mtDNA Haplogroups A, B, C, and D among eastern Asian and Native American populations has long been recognized. |
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Some subclades of C and D closer to the Native American subclades occur among Mongolian, Amur, Japanese, Korean, and Ainu populations. |
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This suggests that the earliest migrants into the northern extremes of North America and Greenland derived from later migrant populations. |
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The remaining whales of the Greenland Sea has been protected ever since, but the populations had not shown any proof of significant regeneration. |
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As a consequence of these blooms, benthic macrophyte populations were deprived of light, while anoxia caused mass mortality in marine animals. |
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Mnemiopsis leidyi populations have been checked with the arrival of another alien species which feeds on them. |
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Confucianism is found predominantly in Mainland China, South Korea, Taiwan and in overseas Chinese populations. |
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The seals are further protected by international agreements, and fur seal populations are recovering. |
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The effect that seamounts have on fish populations has not gone unnoticed by the commercial fishing industry. |
|
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Although not without conflict, European Canadians' early interactions with First Nations and Inuit populations were relatively peaceful. |
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These tropical populations often undergo seasonal cycles of growth and decay in concert with seasonal changes in sea temperature. |
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Overfishing or excessive harvesting of juveniles can also negatively impact local populations. |
|
Information on the species is still limited and much more efforts are needed for a longterm plan to monitor localized populations. |
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Though their effects on human populations are often devastating, tropical cyclones can relieve drought conditions. |
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Fertile soils from weathered volcanic lava have made it possible to sustain dense populations in the agriculturally productive highland areas. |
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The majority of the population is mestizo, with sizable Mayan and White populations present, including Xinca and Garifuna minorities. |
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Before and after the departure of the Norse, the island was inhabited by aboriginal populations. |
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The Grande Coupure is characterized by widespread extinctions and allopatric speciation in small isolated relict populations. |
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The principal mechanism for evolution is natural selection among diverse populations. |
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As genetic drift occurs more frequently in small populations, diversity is an observed consequence of isolation. |
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Recent sequencing of Neanderthal and Denisovan genomes shows that some admixture with these populations has occurred. |
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Many of these relate to the superior adaption to cold environments possessed by the Neanderthal populations. |
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This would seem to indicate that the intellectual superiority of AMH populations may be questionable. |
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The Neanderthal populations seem to have been physically superior to AMH populations. |
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This would show up in a larger number of possible mates for AMH humans, with increased risks of inbreeding amongst Neanderthal populations. |
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Great Britain holds important populations of grey seals, and rare bat species. |
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Our best contemporary source, Gildas, certainly suggests that just such a change of populations did take place. |
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So the spermatogonia of an endangered species could be kept preserved and used to produce male and female broodstock to help rebuild populations. |
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The caul fat required in the recipe can usually be found in supermarkets that make their own sausages and serve ethnic populations. |
|
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African slaves were needed to replace Native American populations that had been decimated by European conquest. |
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London has one of the most ethnically diverse populations in the world. It absorbs more than half of all immigrants to Britain. |
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Evolutionary traps can threaten populations and species if they result in widespread reductions in survival and reproduction. |
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There are important populations of seals and internationally significant nesting grounds for a variety of seabirds such as gannets. |
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In the estuaries, where the bed is more sandy or muddy, the number of species is smaller but the size of their populations is larger. |
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This leads to differing populations of plankton in different parts of the sea and varying communities of animals that feed on these populations. |
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Huge populations of the sea duck, common scoter, spend winters feeding in shallow waters off eastern Ireland, Lancashire and North Wales. |
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There are various regional dialects of English, and numerous languages spoken by some immigrant populations. |
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Their royal houses were effectively destroyed in the fighting, and their Angle populations came under the Danelaw. |
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More broadly, early Medieval Germanic peoples were often assimilated into the walha substrate cultures of their subject populations. |
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During this time, pandemics of European disease such as smallpox devastated the indigenous populations. |
|
There is also the risk of disease being introduced, which can further threaten native populations. |
|
London's wetland areas support nationally important populations of many water birds. |
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Large immigrant populations in the North West result in the presence of significant immigrant languages. |
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On the contrary, romanised European populations developed their own dialects of the language. |
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Physically different from the usual local inhabitants found before this period, they instead resembled the Germanic populations of the north. |
|
Scuba diving is increasingly popular in Ireland with clear waters and large populations of sea life, particularly along the western seaboard. |
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This suggests that the two populations interbred and produced fertile offspring. |
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Also, it is thought that Late Paleolithic and Mesolithic human hunters might have affected the size of the last mammoth populations in Europe. |
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Its geographical range expanded and contracted with the alternating cold and warm cycles, forcing populations to migrate as glaciers receded. |
|
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Recent radiocarbon dating indicates that populations survived as recently as 8,000 BC in western Siberia. |
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More recent extensive DNA evidence, however, suggests a significant replacement of earlier populations. |
|
Agricultural life afforded securities that pastoral life could not, and sedentary farming populations grew faster than nomadic. |
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Some Iron Age migration does seem to have occurred but the nature of the interactions with the indigenous populations of the isles is unknown. |
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What is particularly noticeable is the steep rise in hyperon populations as the limiting mass is approached. |
|
The Romans took their brickmaking skills everywhere they went, introducing the craft to the local populations. |
|
The breakdown of the estimates given in this work into the modern populations of Britain is both interesting and surprising. |
|
The Iraqi and Somali immigrant populations have increased significantly in recent years. |
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Regardless of the cause, populations continued to fall into the 15th century and remained low into the 16th. |
|
Commercial development likewise increased the demand for information, along with rising populations and increased urbanisation. |
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The first three directives in 1940 did not mention civilian populations or morale in any way. |
|
In referendums, some colonial populations have chosen to retain their colonial status, such as Gibraltar and French Guiana. |
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It has not done well in London and in university towns and urban areas with younger populations like Oxford, Cambridge, Manchester, and Brighton. |
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The regions vary greatly in their areas covered, populations and contributions to the national economy. |
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Donated blood is usually subjected to processing after it is collected, to make it suitable for use in specific patient populations. |
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Evolution is change in the heritable characteristics of biological populations over successive generations. |
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Gene flow is the exchange of genes between populations and between species. |
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Gene flow may slow this process by spreading the new genetic variants also to the other populations. |
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This differs from allopatric speciation in that the isolated populations are numerically much smaller than the parental population. |
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Instead, speciation results from the evolution of mechanisms that reduce gene flow between the two populations. |
|
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In populations with high infant mortality rates, LEB is highly sensitive to the rate of death in the first few years of life. |
|
On the west, Slavic populations were also able to penetrate deep into the Balkans. |
|
This type of tourism is growing on islands lacking sandy beaches and dense human populations. |
|
A German dialect, Pennsylvania Dutch, is still present amongst Anabaptist populations in Pennsylvania in the United States. |
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Whatever the level of dispute, over time, the two populations intermarried and merged. |
|
As a result, Eurasians were neglected by both the British and Indian populations in India. |
|
Native animal populations have been very badly affected, with the extinction of at least 10 species attributed to the spread of foxes. |
|
American fox hunters undertake stewardship of the land, and endeavour to maintain fox populations and habitats as much as possible. |
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Microrefugia are sites that support populations of species when their ranges contract during unfavorable climate episodes. |
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Counties with greater populations have multiple constituencies, some of more than one county, but generally do not cross county boundaries. |
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Island countries are typically small with low populations, although some, like Indonesia and Japan are notable exceptions. |
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The inland group is the founder of North and East Asians, Europeans, large sections of the Middle East, and North African populations. |
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By 2,000 BC, Great Britain and Ireland had populations around 250,000 and 50,000, respectively. |
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Later research indicated that the culture may have developed gradually and continuously between the Celts and the indigenous populations. |
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In East Asia by the ninth century, populations centered mostly around merchant activities in coastal Shandong and Jiangsu provinces. |
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During the period of slavery, the populations of Europe and the Americas grew exponentially, while the population of Africa remained stagnant. |
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The rise of port cities saw the clustering of populations caused by the development of steamships and railroads. |
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In villages where two or more populations lived together, the inhabitants would often speak each other's language. |
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Other island populations range down to very low levels on certain small isles. |
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Conversely, islands such as Tiree, Skye and Eigg experienced increases in their respective populations over the same decade. |
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In the past many smaller islands that are uninhabited today had permanent populations. |
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There are also populations of various moorland birds such as curlew, snipe and golden plover. |
|
Red deer are numerous on the northern hills, and there are populations of red squirrel, badger, otter, adder and common lizard. |
|
Brown trout are common in many burns and a number of the rivers in the area have populations of sea trout, salmon and otters. |
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They are home to large bird populations, although many no longer breed on the main islands because of competition from introduced species. |
|
The total bird list for the Chagos Archipelago, including Diego Garcia, consists of 91 species, with large breeding populations of 16 species. |
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Diego Garcia's seabird community includes thriving populations of species which are rapidly declining in other parts of the Indian Ocean. |
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With the economy recovering in the 1990s, expatriate populations, particularly from Egypt and South Asia, have grown again. |
|
The CAP has furthermore been criticised due to its effect on farmland bird populations. |
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If DNA sequences within a species are compared, population geneticists can learn the history of particular populations. |
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Traditionally, subspecies are seen as geographically isolated and genetically differentiated populations. |
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This effectively means that populations of organisms must have reached a certain measurable level of difference to be recognised as subspecies. |
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Another way to look at differences between populations is to measure genetic differences rather than physical differences between groups. |
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Coventry, to the south west, has population close to that of Leicester although the urban and LUZ populations of Coventry are lower. |
|
Tamil language is taught in Canada and South Africa for the local Tamil minority populations. |
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In addition, Irish populations became prevalent in some American mining communities. |
|
Andean music is popular to different degrees across Latin America, having its core public in rural areas and among indigenous populations. |
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These tend to attract bird populations, which can pose a hazard to aircraft in the form of bird strikes. |
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The second period of growth was from 1967 to 1975 when rural populations migrated to urban centers seeking work and better living conditions. |
|
The two official languages, English and Swahili, are used in varying degrees of fluency for communication with other populations. |
|
|
Institutions that have few dormitories or low student housing populations are called commuter schools in the United States. |
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They are usually arranged to promote common interests across the border and cooperate for the common good of the border populations. |
|
Polar bears occasionally come over from Greenland, but they are just visitors, and no Icelandic populations exist. |
|
Brazilian cuisine varies greatly by region, reflecting the country's varying mix of indigenous and immigrant populations. |
|
The Czech Republic has one of the least religious populations in the world. |
|
Under the Republic, provincial governors and tax farmers could exploit local populations for personal gain more freely. |
|
Urban populations and the military preferred to consume their grain in the form of bread. |
|
The local flora are dominated by heather moor, and there are nationally important invertebrate populations on the surrounding sea bed. |
|
Since plankton are the food of fish, abundant fish populations often live where these currents prevail. |
|
Most populations of golden eagles are sedentary, but the species is actually a partial migrant. |
|
In summer, for all populations of mountain hares, the coat is various shades of brown. |
|
In Norway, Sweden, Finland, Russia and Romania populations are large, and it is a common bird to see in forested regions. |
|
Small disjunct resident populations occur in southwesternmost Greenland and western Iceland. |
|
In France, breeding populations have decreased in the northeast, but seem to be stable in southwest and central France and Corsica. |
|
In Switzerland, populations increased during the 1990s, and have stabilised. |
|
The Knapdale population was deliberately released, while the other populations are of unknown origin. |
|
In modern times, tiger numbers are too low to have a limiting effect on boar populations. |
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Pure wild boar populations may still be present, but are extremely localised. |
|
Hong Kong started developing new towns in the 1950s, to accommodate rapidly growing populations. |
|
King was three time Prime Minister of Canada, doing much to help preserve the unity of the French and English populations in his vast country. |
|
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This allows for inducing quantitative differences between two populations from differences between their samples. |
|
In addition, the denser populations could form and support legions of professional soldiers. |
|
Ur, Kish, Isin, Larsa and Nippur in the Middle Bronze Age and Babylon, Calah and Assur in the Late Bronze Age similarly had large populations. |
|
The main Welsh populations of the small but colourful moth Oecophora bractella are found here. |
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These have yielded evidence of how prehistoric human populations lived as nomadic hunters and traders. |
|
When they returned, they carried diminished founder populations that lacked many whole families of organisms. |
|
Introduced mammals are a problem, although populations can recover when rats and cats are removed from islands. |
|
Atlantic puffin populations drastically declined due to habitat destruction and exploitation during the 19th century and early 20th century. |
|
Commercial fishing affects populations because razorbills can become tangled in nets. |
|
Some regard the North American and Eurasian populations as two distinct species. |
|
In the United Kingdom, however, hen harrier populations are in a critical condition, due to habitat loss and illegal killing on grouse moors. |
|
Although once near extinction, they have begun to spread again, from remnant populations in California and Alaska. |
|
This decline in populations is due to hunting to supply the demand for skins. |
|
Selective predation on male frogs by the polecat decreases the occurrence of polyandry in frog populations. |
|
These populations threaten the growth of new trees in several forests on the island, specially oak forests. |
|
Overexploitation has reduced its populations to the point where some have disappeared and others need protection. |
|
Some species or specific populations have none, making them apex predators. |
|
However, the Faroe Islands populations also eat significant numbers of fish. |
|
In general, genetic variation between populations is significant, even among nearby populations. |
|
As a result of this genetic variation, other distinct species currently considered to be populations of common bottlenose dolphin are possible. |
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