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Domestic Duck
Domestic ducks (mainly mallards, ''Anas platyrhynchos domesticus'', with some Muscovy ducks, ''Cairina moschata domestica'') are ducks that have been domesticated and raised for meat and egg (food), eggs. A few are kept for show, or for their ornamental value. Most varieties of domesticated ducks, apart from the Muscovy duck and hybrids, are descended from the mallard, which was domesticated in China around 2000 BC. Duck farming is simplified by their reliable flocking behaviour, and their ability to foraging, forage effectively for themselves. Over 80% of global duck production is in China. Breeds such as White Pekin are raised for meat, while the prolific Indian Runner can produce over 300 eggs per year. In East and Southeast Asia, polycultures such as rice-duck farming are widely practised: the ducks assist the rice with manure and by eating small Pest (organism), pest animals, so that the same land produces rice and ducks at once. In culture, ducks feature in childr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene
The Holocene () is the current geologic time scale, geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene is an interglacial period within the ongoing Ice age, glacial cycles of the Quaternary, and is equivalent to Marine isotope stages, Marine Isotope Stage 1. The Holocene correlates with the last maximum axial tilt towards the Sun of the Earth#Axial tilt and seasons, Earth's obliquity. The Holocene corresponds with the rapid proliferation, growth, and impacts of the human species worldwide, including Recorded history, all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban culture, urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global significance for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sergei Prokofiev
Sergei Sergeyevich Prokofiev; alternative transliterations of his name include ''Sergey'' or ''Serge'', and ''Prokofief'', ''Prokofieff'', or ''Prokofyev''. , group=n ( – 5 March 1953) was a Russian composer, pianist, and conductor who later worked in the Soviet Union. As the creator of acknowledged masterpieces across numerous music genres, he is regarded as one of the major composers of the 20th century. His works include such widely heard pieces as the March from ''The Love for Three Oranges,'' the suite Lieutenant Kijé (Prokofiev), ''Lieutenant Kijé'', the ballet Romeo and Juliet (Prokofiev), ''Romeo and Juliet''—from which "Dance of the Knights" is taken—and ''Peter and the Wolf.'' Of the established forms and genres in which he worked, he created—excluding juvenilia—seven completed operas, seven Symphony, symphonies, eight Ballet (music), ballets, five piano concertos, two violin concertos, a Cello Concerto (Prokofiev), cello concerto, a Symphony-Concerto ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cairina Moschata
The Muscovy duck (''Cairina moschata'') is a duck native to the Americas, from the Lower Rio Grande Valley of Texas and Mexico south to Argentina and Uruguay. The species has been domesticated, and feral Muscovy ducks can be found locally in New Zealand, Australia, the United States, and in Central and Eastern Europe. Description It is a large duck, with the males significantly larger than the females. The males are long and weigh up to ; females are long and weight, roughly half the weight of the males. The wingspan is from . The plumage is predominantly black, with large white patches on the wing; the back and wing feathers being iridescent and glossy in males, while the females are more drab. Muscovy ducks have long claws on their feet and a wide, flat tail. On the head, the male has a short crest on the nape. The bill is black with a speckling of pale pink. A blackish or dark red knob can be seen at the bill base, which is similar in colour to the bare skin of the face. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Duck Breeds
This is a list of the breeds of domestic duck which have official recognition at national or international level. Most breeds of duck derive from the wild mallard, ''Anas platyrhynchos'', while a small minority are descendants of the Muscovy duck, ''Cairina moschata''. Duck breeds are normally officially recognized and described by a national body such as a ministry of agriculture. In some countries they may be recognized by groups of enthusiasts or breeders' associations, which may also draw up a breed standard. Among these are: * the American Poultry Association in the United States * the Poultry Club of Great Britain * the in EuropeEntente EuropéenneListing of European Poultry Breeds and Colours * the Australian Poultry Standards A *Abacot Ranger (also known as Streicher) * African duck *Alabio duck *Allier duck *American Pekin *Ancona duck *Antigua and Barbuda duck *Appleyard *Call duck#Australian Call, Australian Call *Australian Spotted *Aylesbury duck B *Bac Kin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbian Exchange
The Columbian exchange, also known as the Columbian interchange, was the widespread transfer of plants, animals, and diseases between the New World (the Americas) in the Western Hemisphere, and the Old World (Afro-Eurasia) in the Eastern Hemisphere, from the late 15th century on. It is named after the explorer Christopher Columbus and is related to the European colonization of the Americas, European colonization and global trade following his Voyages of Christopher Columbus#First voyage, 1492 voyage. Some of the exchanges were deliberate while others were unintended. Communicable diseases of Old World origin resulted in an 80 to 95 percent reduction in the Indigenous peoples of the Americas, Indigenous population of the Americas from the 15th century onwards, and their extinction in the Influx of disease in the Caribbean, Caribbean. The cultures of both hemispheres were significantly impacted by the migration of people, both free and enslaved, from the Old World to the New. Eur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columella
Lucius Junius Moderatus Columella (, Arabic: ) was a prominent Roman writer on agriculture in the Roman Empire. His in twelve volumes has been completely preserved and forms an important source on Roman agriculture and ancient Roman cuisine, cuisine, together with the works of Cato the Elder and Marcus Terentius Varro, both of which he occasionally cites. A smaller book on trees, , is usually attributed to him. In 1794 the Spanish botanists Ruiz y Pavón, José Antonio Pavón Jiménez and Hipólito Ruiz López named a genus of Peruvian asterids, asterid ''Columellia'' in his honour. Life Little is known of Columella's life. He was probably born in Cádiz, Gades, Hispania Baetica (modern Cádiz), possibly to Roman parents. After a career in the army (he was tribune in Syria (Roman province), Syria in 35 AD), he turned to farming his estates at Ardea, Lazio, Ardea, Carsoli, Carseoli, and Alba Longa, Alba in Latium. Works ''De re rustica'' In ancient times, Columella's wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancient Rome
In modern historiography, ancient Rome is the Roman people, Roman civilisation from the founding of Rome, founding of the Italian city of Rome in the 8th century BC to the Fall of the Western Roman Empire, collapse of the Western Roman Empire in the 5th century AD. It encompasses the Roman Kingdom (753–509 BC), the Roman Republic (50927 BC), and the Roman Empire (27 BC476 AD) until the fall of the western empire. Ancient Rome began as an Italic peoples, Italic settlement, traditionally dated to 753 BC, beside the River Tiber in the Italian peninsula. The settlement grew into the city and polity of Rome, and came to control its neighbours through a combination of treaties and military strength. It eventually controlled the Italian Peninsula, assimilating the Greece, Greek culture of southern Italy (Magna Graecia) and the Etruscans, Etruscan culture, and then became the dominant power in the Mediterranean region and parts of Europe. At its hei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancient Egypt
Ancient Egypt () was a cradle of civilization concentrated along the lower reaches of the Nile River in Northeast Africa. It emerged from prehistoric Egypt around 3150BC (according to conventional Egyptian chronology), when Upper and Lower Egypt were amalgamated by Menes, who is believed by the majority of List of Egyptologists, Egyptologists to have been the same person as Narmer. The history of ancient Egypt unfolded as a series of stable kingdoms interspersed by the "Periodization of ancient Egypt, Intermediate Periods" of relative instability. These stable kingdoms existed in one of three periods: the Old Kingdom of Egypt, Old Kingdom of the Early Bronze Age; the Middle Kingdom of Egypt, Middle Kingdom of the Middle Bronze Age; or the New Kingdom of Egypt, New Kingdom of the Late Bronze Age. The pinnacle of ancient Egyptian power was achieved during the New Kingdom, which extended its rule to much of Nubia and a considerable portion of the Levant. After this period, Egypt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Han Chinese
The Han Chinese, alternatively the Han people, are an East Asian people, East Asian ethnic group native to Greater China. With a global population of over 1.4 billion, the Han Chinese are the list of contemporary ethnic groups, world's largest ethnic group, making up about 17.5% of the world population. The Han Chinese represent 91.11% of the population in China and 97% of the population in Taiwan. Han Chinese are also a significant Overseas Chinese, diasporic group in Southeast Asian countries such as Thailand, Malaysia, and Indonesia. In Singapore, people of Han Chinese or Chinese descent make up around 75% of the country's population. The Han Chinese have exerted a primary formative influence in the development and growth of Chinese civilization. Originating from Zhongyuan, the Han Chinese trace their ancestry to the Huaxia people, a confederation of agricultural tribes that lived along the middle and lower reaches of the Yellow River in the north central plains of Chin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neolithic
The Neolithic or New Stone Age (from Ancient Greek, Greek 'new' and 'stone') is an archaeological period, the final division of the Stone Age in Mesopotamia, Asia, Europe and Africa (c. 10,000 BCE to c. 2,000 BCE). It saw the Neolithic Revolution, a wide-ranging set of developments that appear to have arisen independently in several parts of the world. This "Neolithic package" included the History of agriculture, introduction of farming, domestication of animals, and change from a hunter-gatherer lifestyle to one of sedentism, settlement. The term 'Neolithic' was coined by John Lubbock, 1st Baron Avebury, Sir John Lubbock in 1865 as a refinement of the three-age system. The Neolithic began about 12,000 years ago, when farming appeared in the Epipalaeolithic Near East and Mesopotamia, and later in other parts of the world. It lasted in the Near East until the transitional period of the Chalcolithic (Copper Age) from about 6,500 years ago (4500 BCE), marked by the development ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whole-genome Sequencing
Whole genome sequencing (WGS), also known as full genome sequencing or just genome sequencing, is the process of determining the entirety of the DNA sequence of an organism's genome at a single time. This entails sequencing all of an organism's chromosomal DNA as well as DNA contained in the mitochondria and, for plants, in the chloroplast. Whole genome sequencing has largely been used as a research tool, but was being introduced to clinics in 2014. In the future of personalized medicine, whole genome sequence data may be an important tool to guide therapeutic intervention. The tool of gene sequencing at SNP level is also used to pinpoint functional variants from association studies and improve the knowledge available to researchers interested in evolutionary biology, and hence may lay the foundation for predicting disease susceptibility and drug response. Whole genome sequencing should not be confused with DNA profiling, which only determines the likelihood that genetic ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
