During these long migrations they are extremely vulnerable to attack by predators. |
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Many hydrozoan species perform large vertical diel migrations, which may bring individuals together in spawning aggregations. |
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Recent observations have dispelled the beliefs that gray whales are only bottom feeders and that they do not eat during their migrations. |
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Many extinct or vanishing Indian languages are the only evidence we have of the long migrations and complex histories of particular peoples. |
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Preliminary results show that molas, unlike other large marine vertebrates, are mostly home bodies and unlikely to make large-scale migrations. |
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Pinnipeds and cetaceans make long-distance seasonal migrations to rookeries or warm-water birthing grounds. |
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For most of the past two millennia, the carpet heartlands have been in turmoil, raked by battles, invasions and migrations. |
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Most migrations of efts reported in the northeastern Unites States occur in both spring and fall. |
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And this is before the great twentieth-century migrations of blacks and the blues. |
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Then Maori used it, extensively, in regular migrations, and as a portage route for pounamu. |
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The many migrations since the war have set Britain on the path to becoming a plural and diverse society. |
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From time immemorial there have been friendly migrations and unfriendly onslaughts on the Kerala society, mostly through the sea. |
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Clues from bones tell a remarkable story of an Ice Age drought, where mastodons undertook huge migrations just to survive the seasons. |
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The novel finds a sad, touching disparity between the migrations of birds and the forced marches of uprooted men. |
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Because of their migrations to other countries, it is impossible to arrive at exact population figures for the Garifuna. |
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A few species of Emberizids are migratory, but most are permanent residents or make only short-distance migrations or nomadic wanderings. |
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Clearly, then, the Paleo-Indian and Na-Dene migrations were separate events. |
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Redstarts visit us still with some regularity on their spring and autumn passage migrations, especially along the East Coast. |
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Later migrations from northern and eastern Europe brought the Brythonic Celts and Nordic tribes to the area. |
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Nautical imagery in contemporary art is often used to evoke forced migrations and political exile. |
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The ancestors of the Sotho people entered the area south of the Limpopo River in several migrations. |
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The lack of employment spurs the mass human migrations that so debilitate the district. |
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While their migrations often were due primarily to a lack of pasturage, military and political conquests shaped the way of life in the new lands. |
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Centrosomes also mediate nuclear migrations in a variety of cells and organisms. |
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Among the nomadic Fulani, there are many stories pertaining to their cattle and migrations. |
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In the first, navigable waterways fueled endless migrations and the resources to sustain human ingress. |
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For birds wintering at that northerly location, spring migrations may be less arduous, leading to increased survival and breeding success. |
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There, the commercial fishermen patiently wait every year for the annual migrations of albacore, skipjack, yellowfin, big-eye and bluefin. |
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The barrages separated the river from the sea, and had a disastrous impact on fish that rely on annual migrations upriver to spawn. |
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Chub and barbel may also make the same migrations, although to a lesser extent. |
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Underlying fears and prejudices were revealed in 1879, when a group of blacks coming out of the South during the Exoduster migrations of that year were denied residence in Wichita. |
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For William Clark, writing in his journal, the memorable sights of that autumn day in 1804 consisted mainly of animal migrations. |
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The clans formed by the kinship networks each had their own oral traditions of origin, typically of migrations along the trade routes from a conventional place of origin. |
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Typically, the postglacial biotic migrations were much greater than just the distances landward from synglacial positions of the strandline directly offshore. |
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Their homing abilities could also provide scientists with new clues to the long-debated role of the Earth's magnetic fields in animal movements and migrations. |
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But the genetic changes could also be a reflection of more recent northward migrations following the last Ice Age, about 14,000 years ago, he says. |
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Chinook Salmon are anadromous, making great migrations out to the deepest parts of the ocean and returning as mature adults to their natal streams. |
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Now, scientists hope that robots can revolutionize the study of animal migrations. |
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Large-scale migrations of Angles, Saxons, Jutes, Danes, and Norsemen, and substantial movements between Ireland, Scotland, and Wales, make estimates very hazardous. |
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During their life cycles, the large characins and siluroids need to undertake long migrations in the large rivers and their main tributaries for breeding and feeding purposes. |
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Together, they collect flotsam and wrack that tell of shipwrecks, shifting undersea tectonic plates, the birth and death of sea creatures, their migrations and molts. |
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Today's Indian cuisine is certainly not exactly what it was thousands of years ago as invasions, migrations and travel have left their mark on the sub-continent. |
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There ethnicity was reinforced by later migrations between 800-1200 AD when the Air mountains may have fallen into the possession of new Tuareg tribes. |
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At the same time, the transpacific migrations within and of Hollywood continue to perpetuate the myth that any marker of Asianness is synonymous with foreignness. |
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External migrations out of the Iberian peninsula coincided with these episodes of increased persecution by the Inquisition. |
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Even in distant Byzantium Procopius heard tales of migrations to the Frankish mainland from the island, largely legendary for him, of Brittia. |
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If there had been several migrations, one would expect descendants of more than one lineage to be found. |
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During the Republic the first series of large scale Dutch migrations outside of Europe took place. |
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This would be the first of many population migrations from north to south in Chinese history. |
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These constraints for species migrations are broadly accepted as a cause of the high rate of endemism in vascular plants other than ferns. |
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Their migrations, of course, survive in the writings of novelist John Steinbeck and the iconic images taken by photographer Dorothea Lange. |
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Compared to this, subsequent migrations from mainland Europe had less genetic impact on the British. |
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The natural and social science implications of bluefin tuna migrations off the coast of North Carolina. |
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He has given maps and proposals concerning ancient migrations for Ireland, Scotland, Wales and England. |
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Historically, forced migrations have also altered demographics in relatively short periods of time. |
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The distribution of subclades within Europe is substantially due to the various migrations of the Bronze and Iron Age. |
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It appears there were two distinct oceanic migrations from the mainland to Madagascar. |
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Shorter migrations are common, including altitudinal migrations on mountains such as the Andes and Himalayas. |
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Dugmore noted that in their seasonal migrations the herd follows a doe for that reason. |
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Many species are famous for undertaking long annual migrations, crossing the equator or circumnavigating the Earth in some cases. |
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Gray Whale migrations off of the Pacific Coast were observed, initially, by Marineland of the Pacific in Palos Verdes, California. |
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All subsequent migrations did leave an impact, genetically and culturally, but the main population source of the Portuguese is still Paleolithic. |
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It has been estimated that about two million birds a year use the Wash for feeding and roosting during their annual migrations. |
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Species living in forests, woodland, or bush tend to be sedentary, but many of the plains species undertake long migrations. |
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To conserve energy, heterothermic bats during long migrations may go into a torpid state while roosting in the daytime, and flying at night. |
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This probably served as a legitimation for the Dorian migrations into the Peloponnese. |
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The construction of hydroelectric dams has blocked their migrations and locally extirpated eels in many watersheds. |
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The Greenlandic Inuit are descendants of indigenous migrations from Canada. |
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The nomadic migrations that were the central feature of Arctic life had become a much smaller part of life in the North. |
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Capelin in the Barents Sea and around Iceland are stocks that perform extensive seasonal migrations. |
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Larger fish act as scouts and lead the shoal's direction, particularly during post spawning migrations inshore for feeding. |
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Most epipelagic fish have streamlined bodies capable of sustained cruising on migrations. |
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These vertical migrations often occur over a large vertical distances, and are undertaken with the assistance of a swimbladder. |
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These movements are thought to be in response to the vertical migrations of prey organisms in the deep scattering layer. |
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The swimbladders of deep sea fish are either absent or scarcely operational, and bathypelagic fish do not normally undertake vertical migrations. |
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The Sloane's viperfish can make nightly migrations from bathypelagic depths to near surface waters. |
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They follow vertical migrations of the zooplankton they feed on to the bottom during daytime and to the surface at night time. |
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Many large pelagic fish are oceanic nomadic species which undertake long offshore migrations. |
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Sussex has been occupied since those times and has succumbed to various invasions and migrations throughout its long history. |
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The migrations of Porcupine caribou herds are among the longest of any terrestrial mammal. |
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The tribal and ethnic makeup changed over the centuries as a result of assimilation and, most importantly, migrations. |
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The Viking Age, a period of migrations of Scandinavian peoples, occurred from the late 8th century to the middle 11th century. |
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Archaeological evidence of the earlier migrations mentioned by Caesar has been hard to find. |
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In the Paleolithic period, the Neanderthals entered Iberia and eventually took refuge from the advancing migrations of modern humans. |
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They additionally indicate patterns of ancestry, imply new migrations, and show the actual flow of individuals between disparate regions. |
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However, attempts to determine historical population genetics are complicated by subsequent migrations and demographic fluctuations. |
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In particular, the rapid migrations of the 20th century has made it difficult to assess what prior genetic states were. |
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The mass migrations under British rule collectively known as the Great Trek proved pivotal for the preservation of Boer ethnic identity. |
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The earliest known events in Arabian history are migrations from the Peninsula into neighbouring areas. |
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Due to recent migrations populations of Hindus, Moros and Chinese have also been present in urban areas. |
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Nahua migrations into the region from the north continued into the Postclassic period. |
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The Atlantic sturgeon, a species about 120 million years old, enter the estuary during their annual migrations. |
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These peoples inhabited lands surrounding the Aegean Sea before the subsequent migrations of the Hellenic ancestors claimed by these authors. |
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This appears to be changing, though, in large urban areas, as social changes, migrations, and urbanization take place. |
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The Ndebele descended from Zulu migrations in the 19th century and the other tribes with which they intermarried. |
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Major migrations and cattle drives may require more water on their path than springlets can provide. |
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He saw character in wasps, volition in tipitiwitchets, excitement in pine trees, order in bird migrations and glory in the heavens. |
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I'm interested in the forms of migrations, of exchange, of racialization and exploitation that come out of a modern colonial regime. |
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In addition, samples from 472 migrating peregrine falcons trapped on autumnal and vernal migrations for banding purposes were also tested. |
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Roman culture north of the Po River was almost entirely displaced by the migrations. |
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Samples from Norway were also compared, as this is a source of the later Viking migrations. |
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Due to later migrations, Finnish, Yiddish and Romani have also been spoken for over a hundred years. |
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Greek remained the language of the Byzantine Empire, but the migrations of the Slavs added Slavic languages to Eastern Europe. |
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The migrations and invasions of the 4th and 5th centuries disrupted trade networks around the Mediterranean. |
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The breakup of the Carolingian Empire was accompanied by invasions, migrations, and raids by external foes. |
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One of the largest migrations in American history occurred in the 1840s as the Latter Day Saints left the Midwest to build a theocracy in Utah. |
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Since World War II, the increase in international migrations created a new category of refugees, most of them economic refugees. |
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There have been disputes over the sizes of the migrations and whether they were peaceful. |
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Depending on how many virtual machines you are running, scheduling migrations and cutovers can become complicated, and downtime can become substantial. |
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Of all the birds that take part in these migrations, the eastern Canadian population of the Light-bellied Brent Goose is arguably Ireland's most important species. |
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This fall, millions of devout Muslims will descend upon Mecca, Medina, and Saudi Arabia's holy sites in one of the largest annual migrations in human history. |
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One of the last of these migrations to arrive in the Valley of Mexico settled on an island in the Lake Texcoco and proceeded to subjugate the surrounding tribes. |
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However, analyses based on more current data concerning the migrations of early humans have contributed to a refined definition of this expression. |
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During the Cenozoic, North America was periodically connected to Eurasia via Beringia, allowing multiple migrations back and forth to unite the faunas of the two continents. |
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They were descendants of migrations of ancient prehistoric peoples across the High Arctic thousands of years ago, after crossing from Siberia via the Bering land bridge. |
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Although some estate holders improved the quality of life of their displaced workers, enclosures led to unemployment and forced migrations to the burghs or abroad. |
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Predecessors of the Clovis people may have migrated south along the North American coastlines, although there are arguments for many migrations along several different routes. |
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The authors argue that the presence of the word for sweet potato suggests sporadic contact between Polynesia and South America, but no migrations. |
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These migrations culminated in the Marcomannic Wars, which resulted in widespread destruction and the first invasion of Italy in the Roman Empire period. |
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The migrations to serve sugarcane plantations led to a significant number of ethnic Indians, southeast Asians and Chinese settling in various parts of the world. |
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The British Empire was also responsible for large migrations of peoples. |
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Around Iceland, maturing capelin usually undertake extensive northward feeding migrations in spring and summer and the return migration takes place in September to November. |
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As the season's bait migrations move from the bay to the ocean they attract the attention of migratory fish, plus bottom fish like the snappers, groupers, porgies and grunts. |
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Economic and political migrations made an impact across the empire. |
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Upheavals such as the Great Depression, the Dust Bowl and World War II caused mass migrations of those and other settlers throughout the United States. |
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In this essay I analyze two early stories by the Guadeloupean writer Gisele Pineau, whose main focus is on the dilemmas of migrations between the island and the mainland. |
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This has not yet led to any new theories concerning migrations. |
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Together, these two methods provide an option for tracing back a people's genetic history and charting the historical migrations of both males and females. |
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Later migrations of Black Loyalists, Italians, and Eastern Europeans mostly settled in the island's eastern part around the industrial Cape Breton region. |
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Substantial migrations of Lombards to Naples, Rome and Palermo, continued in the 16th and 17th centuries, driven by the constant overcrowding in the north. |
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In the classical era, from the 3rd century BC Celtic migrations, the Boii and later in the 1st century, Germanic tribes of Marcomanni and Quadi settled there. |
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The dominion of the Western Roman Empire was gradually eroded by abuses of power, civil wars, barbarian migrations and invasions, military reforms and economic depression. |
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Cod, haddock, pollack, herring, flatfish, shark, shad, sturgeon, gaspereau, salmon, and striped bass make annual migrations into the Bay of Fundy to feed. |
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They are believed to be among the earliest human migrations out of Africa. |
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The finless porpoise is known to also follow seasonal migrations. |
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Mass migrations of immigrants to the United States came in several waves. |
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European colonization of the Americas and other parts of the world intensified and associated mass migrations of people grew in size as the Age of Sail continued. |
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A large-scale study of ancient genetics, published in the June 11 Nature, provides evidence for migrations and lactose intolerance in Bronze Age Eurasia. |
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Most migrations begin with the birds starting off in a broad front. |
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Leaver traces the textual relationships among the many metrical versions of the psalms from Luther onwards, and follows the migrations of melodies from country to country. |
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The ability of birds to navigate during migrations cannot be fully explained by endogenous programming, even with the help of responses to environmental cues. |
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These behaviors explain the long wing lengths observed in species, and can also account for the efficient metabolisms that give the birds energy during long migrations. |
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King mackerels cruise on long migrations at 10 kilometres per hour. |
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Most current genetic and archaeological evidence supports a recent single origin of modern humans in East Africa, with first migrations placed at 60,000 years ago. |
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Important human migrations occurred in the Pacific in prehistoric times. |
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Only the ring ouzel leaves Great Britain for long migrations. |
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During Upper Paleolithic times they spread throughout Africa, Eurasia, Oceania, and the Americas, and they encountered archaic humans along the way during these migrations. |
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Recent research indicates that the Neanderthals timed their hunts and the migrations of game animals long before the beginning of the Upper Paleolithic. |
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This phenomenon established the older haplogroups found among Native Americans, and later migrations are responsible for northern North American haplogroups. |
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The most active times of the year for birding in temperate zones are during the spring or fall migrations when the greatest variety of birds may be seen. |
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Many of the migrations were movements of Germanic, Hunnic, Slavic, and other peoples into the territory of the then Roman Empire with or without accompanying invasions or war. |
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Catostomid spawning migrations and late-summer fish assemblages in Lower Muddy Creek, an intermittent watershed in southern Carbon County, Wyoming. |
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From around the 5th to the 7th century, Northern Europe experienced mass migrations and this period and its material culture are referred to as the Germanic Iron Age. |
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It is threatened by habitat loss, especially by drainage of its breeding sites, and some toads get killed on the roads as they make their annual migrations. |
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This, in turn, decreased the amount of land conducive to settlements and helped to cause migrations of farming communities to the more tropical climate of West Africa. |
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