Japan is an island country in East Asia. Located in the Pacific Ocean, it lies off the eastern coast of the Asian continent and stretches from the Sea of Okhotsk in the north to the East China Sea and the Philippine Sea in the south; the kanji that make up Japan's name mean "sun origin", it is called the "Land of the Rising Sun". Japan is a stratovolcanic archipelago consisting of about 6,852 islands; the four largest are Honshu, Hokkaido and Shikoku, which make up about ninety-seven percent of Japan's land area and are referred to as home islands. The country is divided into 47 prefectures in eight regions, with Hokkaido being the northernmost prefecture and Okinawa being the southernmost one; the population of 127 million is the world's tenth largest. 90.7 % of people live in cities. About 13.8 million people live in the capital of Japan. The Greater Tokyo Area is the most populous metropolitan area in the world with over 38 million people. Archaeological research indicates; the first written mention of Japan is in Chinese history texts from the 1st century AD.
Influence from other regions China, followed by periods of isolation from Western Europe, has characterized Japan's history. From the 12th century until 1868, Japan was ruled by successive feudal military shōguns who ruled in the name of the Emperor. Japan entered into a long period of isolation in the early 17th century, ended in 1853 when a United States fleet pressured Japan to open to the West. After nearly two decades of internal conflict and insurrection, the Imperial Court regained its political power in 1868 through the help of several clans from Chōshū and Satsuma – and the Empire of Japan was established. In the late 19th and early 20th centuries, victories in the First Sino-Japanese War, the Russo-Japanese War and World War I allowed Japan to expand its empire during a period of increasing militarism; the Second Sino-Japanese War of 1937 expanded into part of World War II in 1941, which came to an end in 1945 following the Japanese surrender. Since adopting its revised constitution on May 3, 1947, during the occupation led by SCAP, the sovereign state of Japan has maintained a unitary parliamentary constitutional monarchy with an Emperor and an elected legislature called the National Diet.
Japan is a member of the ASEAN Plus mechanism, UN, the OECD, the G7, the G8, the G20, is considered a great power. Its economy is the world's third-largest by nominal GDP and the fourth-largest by purchasing power parity, it is the world's fourth-largest exporter and fourth-largest importer. Japan benefits from a skilled and educated workforce. Although it has renounced its right to declare war, Japan maintains a modern military with the world's eighth-largest military budget, used for self-defense and peacekeeping roles. Japan is a developed country with a high standard of living and Human Development Index, its population enjoys the highest life expectancy and third lowest infant mortality rate in the world, but is experiencing issues due to an aging population and low birthrate. Japan is renowned for its historical and extensive cinema, influential music industry, video gaming, rich cuisine and its major contributions to science and modern technology; the Japanese word for Japan is 日本, pronounced Nihon or Nippon and means "the origin of the sun".
The character nichi means "sun" or "day". The compound therefore means "origin of the sun" and is the source of the popular Western epithet "Land of the Rising Sun"; the earliest record of the name Nihon appears in the Chinese historical records of the Tang dynasty, the Old Book of Tang. At the end of the seventh century, a delegation from Japan requested that Nihon be used as the name of their country; this name may have its origin in a letter sent in 607 and recorded in the official history of the Sui dynasty. Prince Shōtoku, the Regent of Japan, sent a mission to China with a letter in which he called himself "the Emperor of the Land where the Sun rises"; the message said: "Here, I, the emperor of the country where the sun rises, send a letter to the emperor of the country where the sun sets. How are you". Prior to the adoption of Nihon, other terms such as Yamato and Wakoku were used; the term Wa is a homophone of Wo 倭, used by the Chinese as a designation for the Japanese as early as the third century Three Kingdoms period.
Another form of Wa, Wei in Chinese) was used for an early state in Japan called Nakoku during the Han dynasty. However, the Japanese disliked some connotation of Wa 倭, it was therefore replaced with the substitute character Wa, meaning "togetherness, harmony"; the English word Japan derives from the historical Chinese pronunciation of 日本. The Old Mandarin or early Wu Chinese pronunciation of Japan was recorded by Marco Polo as Cipangu. In modern Shanghainese, a Wu dialect, the pronunciation of characters 日本; the old Malay word for Japan, Japun or Japang, was borrowed from a southern coastal Chinese dialect Fukienese or Ningpo – and this Malay word was encountered by Portuguese traders in Southeast Asia in the 16th century. These Early Portuguese traders brought the word
Genetically modified organism
A genetically modified organism is any organism whose genetic material has been altered using genetic engineering techniques. The exact definition of a genetically modified organism and what constitutes genetic engineering varies, with the most common being an organism altered in a way that "does not occur by mating and/or natural recombination". A wide variety of organisms have been genetically modified, from animals to plants and microorganisms. Genes have been transferred within the same species, across species and across kingdoms. New genes can be introduced. Creating a genetically modified organism is a multi-step process. Genetic engineers must isolate the gene they wish to insert into the host organism and combine it with other genetic elements, including a promoter and terminator region and a selectable marker. A number of techniques are available for inserting the isolated gene into the host genome. Recent advancements using genome editing techniques, notably CRISPR, have made the production of GMO's much simpler.
Herbert Boyer and Stanley Cohen made the first genetically modified organism in 1973, a bacteria resistant to the antibiotic kanamycin. The first genetically modified animal, a mouse, was created in 1974 by Rudolf Jaenisch, the first plant was produced in 1983. In 1994 the Flavr Savr tomato was released, the first commercialized genetically modified food; the first genetically modified animal to be commercialized was the GloFish and the first genetically modified animal to be approved for food use was the AquAdvantage salmon in 2015. Bacteria are the easiest organisms to engineer and have been used for research, food production, industrial protein purification and art. There is potential to use them for purposes or as medicine. Fungi have been engineered with much the same goals. Viruses play an important role as vectors for inserting genetic information into other organisms; this use is relevant to human gene therapy. There are proposals to remove the virulent genes from viruses to create vaccines.
Plants have been engineered for scientific research, to create new colors in plants, deliver vaccines and to create enhanced crops. Genetically modified crops are publicly the most controversial GMOs; the majority are engineered for insect resistance. Golden rice has been engineered with three genes. Other prospects for GM crops are as bioreactors for the production of biopharmaceuticals, biofuels or medicines. Animals are much harder to transform and the vast majority are still at the research stage. Mammals are the best model organisms for humans, making ones genetically engineered to resemble serious human diseases important to the discovery and development of treatments. Human proteins expressed in mammals are more to be similar to their natural counterparts than those expressed in plants or microorganisms. Livestock are modified with the intention of improving economically important traits such as growth-rate, quality of meat, milk composition, disease resistance and survival. Genetically modified fish are used as pets and as a food source.
Genetic engineering has been proposed as a way to control mosquitos, a vector for many deadly diseases. Although human gene therapy is still new, it has been used to treat genetic disorders such as severe combined immunodeficiency, Leber's congenital amaurosis. Many objections have been raised over the development of GMO's their commercialization. Many of these involve GM crops and whether food produced from them is safe and what impact growing them will have on the environment. Other concerns are the objectivity and rigor of regulatory authorities, contamination of non-genetically modified food, control of the food supply, patenting of life and the use of intellectual property rights. Although there is a scientific consensus that available food derived from GM crops poses no greater risk to human health than conventional food, GM food safety is a leading issue with critics. Gene flow, impact on non-target organisms and escape are the major environmental concerns. Countries have adopted regulatory measures to deal with these concerns.
There are differences in the regulation for the release of GMOs between countries, with some of the most marked differences occurring between the US and Europe. One of the key issues concerning regulators is whether GM food should be labeled and the status of gene edited organisms. What constitutes a genetically modified organism is not always clear and can vary widely. At its broadest it can include anything. Taking a less broad view it can encompass every organism that has had its genes altered by humans, which would include all crops and livestock. In 1993 the Encyclopedia Britannica defined genetic engineering as "any of a wide range of techniques... among them artificial insemination, in vitro fertilization, sperm banks and gene manipulation." The European Union included a broad definition in early reviews mentioning GMOs being produced by "selective breeding and other means of artificial selection." They excluded traditional breeding, in vitro fertilization, induction of polyploidy and cell fusion techniques that do not use recombinant nucleic acids or a genetically modified organism in the process.
A narrower definition provided by the Food and Agriculture Organization, the World Health Organization and the European Commission says that the organisms must be altered in a way that does "not occur by mating and/or natur
A security is a tradable financial asset. The term refers to any form of financial instrument, but its legal definition varies by jurisdiction. In some jurisdictions the term excludes financial instruments other than equities and fixed income instruments. In some jurisdictions it includes some instruments that are close to equities and fixed income, e.g. equity warrants. In some countries and languages the term "security" is used in day-to-day parlance to mean any form of financial instrument though the underlying legal and regulatory regime may not have such a broad definition. In the United Kingdom, the national competent authority for financial markets regulation is the Financial Conduct Authority. In the United States, a security is a tradable financial asset of any kind. Securities are broadly categorized into: debt securities equity securities derivatives; the company or other entity issuing the security is called the issuer. A country's regulatory structure determines. For example, private investment pools may have some features of securities, but they may not be registered or regulated as such if they meet various restrictions.
Securities may be represented by a certificate or, more "non-certificated", in electronic or "book entry" only form. Certificates may be bearer, meaning they entitle the holder to rights under the security by holding the security, or registered, meaning they entitle the holder to rights only if he or she appears on a security register maintained by the issuer or an intermediary, they include shares of corporate stock or mutual funds, bonds issued by corporations or governmental agencies, stock options or other options, limited partnership units, various other formal investment instruments that are negotiable and fungible. Securities may be classified according to many categories or classification systems: Currency of denomination Ownership rights Terms to maturity Degree of liquidity Income payments Tax treatment Credit rating Industrial sector or "industry". Region or country Market capitalization State Securities are the traditional way that commercial enterprises raise new capital; these may be an attractive alternative to bank loans depending on their pricing and market demand for particular characteristics.
Another disadvantage of bank loans as a source of financing is that the bank may seek a measure of protection against default by the borrower via extensive financial covenants. Through securities, capital is provided by investors who purchase the securities upon their initial issuance. In a similar way, a government may issue securities too. Investors in securities may be retail, i.e. members of the public investing other than by way of business. The greatest part of investment, in terms of volume, is wholesale, i.e. by financial institutions acting on their own account, or on behalf of clients. Important institutional investors include investment banks, insurance companies, pension funds and other managed funds; the traditional economic function of the purchase of securities is investment, with the view to receiving income or achieving capital gain. Debt securities offer a higher rate of interest than bank deposits, equities may offer the prospect of capital growth. Equity investment may offer control of the business of the issuer.
Debt holdings may offer some measure of control to the investor if the company is a fledgling start-up or an old giant undergoing'restructuring'. In these cases, if interest payments are missed, the creditors may take control of the company and liquidate it to recover some of their investment; the last decade has seen an enormous growth in the use of securities as collateral. Purchasing securities with borrowed money secured by other securities or cash itself is called "buying on margin". Where A is owed a debt or other obligation by B, A may require B to deliver property rights in securities to A, either at inception or only in default. For institutional loans, property rights are not transferred but enable A to satisfy its claims in the event that B fails to make good on its obligations to A or otherwise becomes insolvent. Collateral arrangements are divided into two broad categories, namely security interests and outright collateral transfers. Commercial banks, investment banks, government agencies and other institutional investors such as mutual funds are significant collateral takers as well as providers.
In addition, private parties may utilize stocks or other securities as collateral for portfolio loans in securities lending scenarios. On the consumer level, loans against securities have grown into three distinct groups over the last decade: 1) Standard Institutional Loans offering low loan-to-value with
Osaka is a designated city in the Kansai region of Japan. It is the capital city of Osaka Prefecture and the largest component of the Keihanshin Metropolitan Area, the second largest metropolitan area in Japan and among the largest in the world with over 19 million inhabitants. Osaka will host Expo 2025; the current mayor of Osaka is Ichiro Matsui. Some of the earliest signs of human habitation in the Osaka area at the Morinomiya ruins comprise shell mounds, sea oysters and buried human skeletons from the 6th–5th centuries BC, it is believed that what is today the Uehonmachi area consisted of a peninsular land with an inland sea in the east. During the Yayoi period, permanent habitation on the plains grew. By the Kofun period, Osaka developed into a hub port connecting the region to the western part of Japan; the large numbers of larger tomb mounds found in the plains of Osaka are seen as evidence of political-power concentration, leading to the formation of a state. The Kojiki records that during 390–430 AD there was an imperial palace located at Osumi, in what is present day Higashiyodogawa ward, but it may have been a secondary imperial residence rather than a capital.
In 645, Emperor Kōtoku built his Naniwa Nagara-Toyosaki Palace in what is now Osaka, making it the capital of Japan. The city now known as Osaka was at this time referred to as Naniwa, this name and derivations of it are still in use for districts in central Osaka such as Naniwa and Namba. Although the capital was moved to Asuka in 655, Naniwa remained a vital connection, by land and sea, between Yamato and China. Naniwa was declared the capital again in 744 by order of Emperor Shōmu, remained so until 745, when the Imperial Court moved back to Heijō-kyō. By the end of the Nara period, Naniwa's seaport roles had been taken over by neighboring areas, but it remained a lively center of river and land transportation between Heian-kyō and other destinations. In 1496, Jōdo Shinshū Buddhists established their headquarters in the fortified Ishiyama Hongan-ji, located directly on the site of the old Naniwa Imperial Palace. Oda Nobunaga began a decade-long siege campaign on the temple in 1570 which resulted in the surrender of the monks and subsequent razing of the temple.
Toyotomi Hideyoshi constructed Osaka Castle in its place in 1583. Osaka was long considered Japan's primary economic center, with a large percentage of the population belonging to the merchant class. Over the course of the Edo period, Osaka grew into one of Japan's major cities and returned to its ancient role as a lively and important port, its popular culture was related to ukiyo-e depictions of life in Edo. By 1780, Osaka had cultivated a vibrant arts culture, as typified by its famous Kabuki and Bunraku theaters. In 1837, Ōshio Heihachirō, a low-ranking samurai, led a peasant insurrection in response to the city's unwillingness to support the many poor and suffering families in the area. One-quarter of the city was razed before shogunal officials put down the rebellion, after which Ōshio killed himself. Osaka was opened to foreign trade by the government of the Bakufu at the same time as Hyōgo on 1 January 1868, just before the advent of the Boshin War and the Meiji Restoration. Osaka residents were stereotyped in Edo literature from at least the 18th century.
Jippensha Ikku in 1802 depicted Osakans as stingy beyond belief. In 1809, the derogatory term "Kamigata zeeroku" was used by Edo residents to characterize inhabitants of the Osaka region in terms of calculation, lack of civic spirit, the vulgarity of Osaka dialect. Edo writers aspired to samurai culture, saw themselves as poor but generous and public spirited. Edo writers by contrast saw "zeeroku" as obsequious apprentices, greedy and lewd. To some degree, Osaka residents are still stigmatized by Tokyo observers in the same way today in terms of gluttony, evidenced in the phrase, "Residents of Osaka devour their food until they collapse"; the modern municipality was established in 1889 by government ordinance, with an initial area of 15 square kilometres, overlapping today's Chūō and Nishi wards. The city went through three major expansions to reach its current size of 223 square kilometres. Osaka was the industrial center most defined in the development of capitalism in Japan, it became known as the "Manchester of the Orient."The rapid industrialization attracted many Korean immigrants, who set up a life apart for themselves.
The political system was pluralistic, with a strong emphasis on promoting industrialization and modernization. Literacy was high and the educational system expanded producing a middle class with a taste for literature and a willingness to support the arts. In 1927, General Motors operated a factory called Osaka Assembly until 1941, manufacturing Chevrolet, Pontiac and Buick vehicles and staffed by Japanese workers and managers. In the nearby city of Ikeda in Osaka Prefecture is the headquarters office of Daihatsu, one of Japan's oldest automobile manufacturers. Like its European and American counterparts, Osaka displayed slums and poverty. In Japan it was here that municipal government first introduced a comprehensive system of poverty relief, copied in part from British models. Osaka policymakers stressed the importance of family formation and mutual assistance as the best way to combat poverty; this minimized
Maize known as corn, is a cereal grain first domesticated by indigenous peoples in southern Mexico about 10,000 years ago. The leafy stalk of the plant produces pollen inflorescences and separate ovuliferous inflorescences called ears that yield kernels or seeds, which are fruits. Maize has become a staple food in many parts of the world, with the total production of maize surpassing that of wheat or rice. However, little of this maize is consumed directly by humans: most is used for corn ethanol, animal feed and other maize products, such as corn starch and corn syrup; the six major types of maize are dent corn, flint corn, pod corn, flour corn, sweet corn. Maize is the most grown grain crop throughout the Americas, with 361 million metric tons grown in the United States in 2014. 40% of the crop—130 million tons—is used for corn ethanol. Genetically modified maize made up 85% of the maize planted in the United States in 2009. Sugar-rich varieties called sweet corn are grown for human consumption as kernels, while field corn varieties are used for animal feed, various corn-based human food uses, as chemical feedstocks.
Maize is used in making ethanol and other biofuels. Most historians believe. Recent research in the early 21st century has modified this view somewhat. An influential 2002 study by Matsuoka et al. has demonstrated that, rather than the multiple independent domestications model, all maize arose from a single domestication in southern Mexico about 9,000 years ago. The study demonstrated that the oldest surviving maize types are those of the Mexican highlands. Maize spread from this region over the Americas along two major paths; this is consistent with a model based on the archaeological record suggesting that maize diversified in the highlands of Mexico before spreading to the lowlands. Archaeologist Dolores Piperno has said: A large corpus of data indicates that it was dispersed into lower Central America by 7600 BP and had moved into the inter-Andean valleys of Colombia between 7000 and 6000 BP. Since even earlier dates have been published. According to a genetic study by Embrapa, corn cultivation was introduced in South America from Mexico, in two great waves: the first, more than 6000 years ago, spread through the Andes.
Evidence of cultivation in Peru has been found dating to about 6700 years ago. The second wave, about 2000 years ago, through the lowlands of South America. Before domestication, maize plants grew only small, 25 millimetres long corn cobs, only one per plant. In Spielvogel's view, many centuries of artificial selection by the indigenous people of the Americas resulted in the development of maize plants capable of growing several cobs per plant, which were several centimetres/inches long each; the Olmec and Maya cultivated maize in numerous varieties throughout Mesoamerica. It was believed. Research of the 21st century has established earlier dates; the region developed a trade network based on surplus and varieties of maize crops. Mapuches of south-central Chile cultivated maize along with quinoa and potatoes in Pre-Hispanic times, however potato was the staple food of most Mapuches, "specially in the southern and coastal territories where maize did not reach maturity". Before the expansion of the Inca Empire maize was traded and transported as far south as 40°19' S in Melinquina, Lácar Department.
In that location maize remains were found inside pottery dated to 730 ±80 BP and 920 ±60 BP. This maize was brought across the Andes from Chile; the presence of maize in Guaitecas Archipelago, which constitute southernmost outspost of Pre-Hispanic agriculture, is reported by early Spanish explorers. However the Spanish may have misidentified the plant. After the arrival of Europeans in 1492, Spanish settlers consumed maize and explorers and traders carried it back to Europe and introduced it to other countries. Spanish settlers far preferred wheat bread to cassava, or potatoes. Maize flour could not be substituted for wheat for communion bread, since in Christian belief only wheat could undergo transubstantiation and be transformed into the body of Christ; some Spaniards worried that by eating indigenous foods, which they did not consider nutritious, they would weaken and risk turning into Indians. "In the view of Europeans, it was the food they ate more than the environment in which they lived, that gave Amerindians and Spaniards both their distinctive physical characteristics and their characteristic personalities."
Despite these worries, Spaniards did consume maize. Archeological evidence from Florida sites indicate. Maize spread to the rest of the world because of its ability to grow in diverse climates, it was cultivated in Spain just a few decades after Columbus's voyages and spread to Italy, West Africa and elsewhere. The word maize derives from the Spanish form of the indigenous Taíno word for mahiz, it is known by other names around the world. The word "corn" outside North America and New Zealand refers to any cereal crop, its meaning understood to vary geographically to refer to the local staple. In the United Stat
Fukuoka is the capital city of Fukuoka Prefecture, situated on the northern shore of Japanese island Kyushu. It is the most populous city on the island, followed by Kitakyushu, it is the largest city and metropolitan area west of Keihanshin. The city was designated on April 1972, by government ordinance. Greater Fukuoka, with a population of 2.5 million people, is part of the industrialized Fukuoka–Kitakyushu zone. As of 2015, Fukuoka is Japan's sixth largest city. In July 2011, Fukuoka surpassed the population of Kyoto. Since the founding of Kyoto in 794, this marks the first time that a city west of the Kinki region has a larger population than Kyoto. In ancient times, the area near Fukuoka, the Chikushi region, was thought by some historians to have been more influential than the Yamato region. Exchanges from the continent and the Northern Kyushu area date as far back as Old Stone Age, it has been thought. Several Kofun exist. Fukuoka was sometimes called the Port of Dazaifu, 15 km southeast from Fukuoka.
Dazaifu was an administrative capital in 663 A. D. but a historian proposed. Ancient texts, such as the Kojiki and archaeology confirm this was a critical place in the founding of Japan; some scholars claim that it was the first place outsiders and the Imperial Family set foot, but like many early Japan origin theories, it remains contested. Central Fukuoka is sometimes still referred as Hakata, the name of the central ward. In 923, the Hakozaki-gū in Fukuoka was transferred from Daibu-gū in Daibu, 16 km northeast from Dazaifu, the origin of Usa Shrine and established as a branch of the Usa Shrine at Fukuoka. In Ooho, 15 km south from Dazaifu, there are remains of a big ward office with a temple, because in ancient East Asia, an emperor must have three great ministries. In fact, there is a record in Chinese literature that a king of Japan sent a letter in 478 to ask the Chinese emperor's approval for employing three ministries. In addition, remains of the Korokan were found in Fukuoka underneath a part of the ruins of Fukuoka Castle.
Kublai Khan of the Mongol Empire turned his attention towards Japan starting in 1268, exerting a new external pressure on Japan with which it had no experience. Kublai Khan first sent an envoy to Japan to make the Shogunate acknowledge Khan's suzerainty; the Kamakura shogunate refused. Mongolia sent envoys thereafter, each time urging the Shogunate to accept their proposal, but to no avail. In 1274, Kublai Khan mounted an invasion of the northern part of Kyushu with a fleet of 900 ships and 33,000 troops, including troops from Goryeo on the Korean Peninsula; this initial invasion was compromised by a combination of incompetence and severe storms. After the invasion attempt of 1274, Japanese samurai built a stone barrier 20 km in length bordering the coast of Hakata Bay in what is now the city of Fukuoka; the wall, 2–3 metres in height and having a base width of 3 metres, was constructed between 1276 and 1277, was excavated in the 1930s. Kublai sent another envoy to Japan in 1279. At that time, Hōjō Tokimune of the Hōjō clan was the Eighth Regent.
Not only did he decline the offer, but he beheaded the five Mongolian emissaries after summoning them to Kamakura. Infuriated, Kublai organized another attack on Fukuoka Prefecture in 1281, mobilizing 140,000 soldiers and 4,000 ships; the Japanese defenders, numbering around 40,000, were no match for the Mongols and the invasion force made it as far as Dazaifu, 15 km south of the city of Fukuoka. However, the Japanese were again aided by severe weather, this time by a typhoon that struck a crushing blow to the Mongolian troops, thwarting the invasion, it was this typhoon that came to be called the Kamikaze, was the origin of the term Kamikaze used to indicate suicide attacks by military aviators of the Empire of Japan against Allied naval vessels during World War II. Fukuoka was the residence of the powerful daimyō of Chikuzen Province, played an important part in the medieval history of Japan; the renowned temple of Tokugawa Ieyasu in the district was destroyed by fire during the Boshin War of 1868.
The modern city was formed on April 1, 1889, with the merger of the former cities of Hakata and Fukuoka. Hakata was the port and merchant district, was more associated with the area's culture and remains the main commercial area today. On the other hand, the Fukuoka area was home to many samurai, its name has been used since Kuroda Nagamasa, the first daimyō of Chikuzen Province, named it after his birthplace in Okayama Prefecture and the "old Fukuoka" is the main shopping area, now called Tenjin; when Hakata and Fukuoka decided to merge, a meeting was held to decide the name for the new city. Hakata was chosen, but a group of samurai crashed the meeting and forced those present to choose Fukuoka as the name for the merged city. However, Hakata is still used to refer to the Hakata area of the city and, most famously, to refer to the city's train station, Hakata Station, dialect, Hakata-ben. 1903: Fukuoka Medical College, a campus associated with Kyoto Imperial University, is founded. In 1911, the college is established as a separate entity.
1910: Fukuoka streetcar service begins. 1929: Flights commence along the Fukuoka-Osaka-Tokyo route. 1945: Fukuoka was firebombed on 19 June, with the attack destroying 21.5 percent of the city's urban area. 1947: First Fukuoka Marathon. 1951: F
A broiler is any chicken, bred and raised for meat production. Many typical broilers have yellowish skin. Most commercial broilers reach slaughter-weight between four and seven weeks of age, although slower growing breeds reach slaughter-weight at 14 weeks of age. Due to extensive breeding selection for rapid early growth and the husbandry used to sustain this, broilers are susceptible to several welfare concerns skeletal malformation and dysfunction and eye lesions and congestive heart conditions. Management of ventilation, stocking density and in-house procedures must be evaluated to support good welfare of the flock; the breeding stock do grow to maturity but have their own welfare concerns related to the frustration of a high feeding motivation and beak trimming. Broilers are grown as mixed-sex flocks in large sheds under intensive conditions. Before the development of modern commercial meat breeds, broilers were young male chickens culled from farm flocks. Pedigree breeding began around 1916.
Magazines for the poultry industry existed at this time. A crossbred variety of chicken was produced from a male of a double-breasted Cornish strain, a female of a tall, large-boned strain of white Plymouth Rocks; this first attempt at a meat crossbreed was introduced in the 1930s and became dominant in the 1960s. The original crossbreed was plagued by problems of low fertility, slow growth and disease susceptibility. Modern broilers have become different from the Cornish/Rock crossbreed; as an example, Donald Shaver began gathering breeding stock for a broiler program in 1950. Besides the breeds favoured, Cornish Game, Plymouth Rock, New Hampshire, Jersey Black Giant and Brahmas were included. A white feathered female line was purchased from Cobb. A full scale breeding program was commenced in 1958, with commercial shipments in Canada and the US in 1959 and in Europe in 1963; as a second example, colour sexing broilers was proposed by Shaver in 1973. The genetics were based on the company's breeding plan for egg-layers, developed in the mid-1960s.
A difficulty facing the breeders of the colour-sexed broiler is that the chicken must be white-feathered by slaughter age. After 12 years, accurate colour sexing without compromising economic traits was achieved. Artificial insemination is a mechanism in which spermatozoa are deposited into the reproductive tract of a female. Artificial insemination provides a number of benefits relating to reproduction in the poultry industry. Broiler breeds have been selected for growth, causing them to develop large pectoral muscles, which interfere with and reduce natural mating; the amount of sperm produced and deposited in the hen’s reproductive tract may be limited because of this. Additionally, the males overall sex drive may be reduced due to growth selection. Artificial insemination has allowed many farmers to incorporate selected genes into their stock, increasing their genetic qualityAbdominal massage is the most common method used for semen collection. During this process, the rooster is restrained and the back region located towards the tail and behind the wings is caressed.
This is done but quickly. Within a short period of time, the male should get an erection of the phallus. Once this occurs, the cloaca is squeezed and semen is collected from the external papilla of the vas deferensDuring artificial insemination, semen is most deposited intra-vaginally by means of a plastic syringe. In order for semen to be deposited here, the vaginal orifice is everted through the cloaca; this is done by applying pressure to the abdomen of the hen. The semen-containing instrument is placed 2–4 cm into the vaginal orifice; as the semen is being deposited, the pressure applied to the hen’s abdomen is being released simultaneously. The individual performing this procedure uses one hand to move and direct the tail feathers, while using the other hand to insert the instrument and semen into the vagina. Modern commercial broilers, for example, Cornish crosses and Cornish-Rocks, are artificially selected and bred for large-scale, efficient meat production, they are noted for having fast growth rates, a high feed conversion ratio, low levels of activity.
Modern commercial broilers are bred to reach a slaughter-weight of about 2 kg in only 35 to 49 days. As a consequence, the behaviour and physiology of broilers reared for meat are those of immature birds, rather than adults. Slow growing free-range and organic strains have been developed which reach slaughter-weight at 12 to 16 weeks of age. Typical broilers have yellowish skin. Recent genetic analysis has revealed that the gene for yellow skin was incorporated into domestic birds through hybridization with the grey junglefowl. Modern crosses are favorable for meat production because they lack the typical "hair" which many breeds have that must be removed by singeing after plucking the carcass. Both male and female broilers are reared for their meat. Broiler behaviour is modified by the environment, alters as the broilers’ age and bodyweight increase. For example, the activity of broilers reared outdoors is greater than broilers reared indoors, but from six weeks of age, decreases to comparable levels in all groups.
The same study shows that in the outdoors group little use is made of the extra space and facilities such as perches – it was proposed that the main reason for this was leg weakness as 80 per cent of the birds had a detectable gait abnormality at seven weeks of age. There is no evidence of reduced moti