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Stone marten (Martes foina).
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Rare species of marten (Martes pennanti, family Mustelidae) found in northern forests of North America. The fisher is related to weasels and is similarly shaped. It has a bushy tail, tapered muzzle and low, rounded ears. Adults are usually 20–25 in. (50–63 cm) long, excluding the 13–17-in. (33–43-cm) tail, and weigh 3–15 lb (1.4–6.8 kg). Fishers hunt on the ground and in trees, attacking various rodents and other animals; they also eat fruits and sometimes nuts. It has been trapped for its valuable brownish black fur.
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(born Feb. 17, 1890, East Finchley, Middlesex, Eng.—died July 29, 1962, Adelaide, S.Aus., Austl.) British statistician and geneticist. As statistician for an agricultural research institute, he investigated the linkage of genes for different traits. To avoid unintentional bias in selection of materials used in experiments, he introduced the principle of randomization. It states that before an experimental effect can be attributed to a given cause or treatment, the experiment must be repeated on control units of the material and that all material used in experiments must be selected at random from the whole population it intends to represent. He also developed the concept of the analysis of variance, a statistical procedure used to design experiments that answer several questions at once.
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(born Feb. 27, 1867, Saugerties, N.Y., U.S.—died April 29, 1947, New Haven, Conn.) U.S. economist best known for his work in the field of capital theory. He received his Ph.D. from Yale University. As a professor at Yale (1892–1935), he examined the relationship between changes in the quantity of money and the general level of prices. He also promoted the concept of the “compensated dollar”—a dollar of constant purchasing power, defined in terms of an index of commodity prices rather than in terms of a given weight of gold. Seealso price index.
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(born Feb. 17, 1890, East Finchley, Middlesex, Eng.—died July 29, 1962, Adelaide, S.Aus., Austl.) British statistician and geneticist. As statistician for an agricultural research institute, he investigated the linkage of genes for different traits. To avoid unintentional bias in selection of materials used in experiments, he introduced the principle of randomization. It states that before an experimental effect can be attributed to a given cause or treatment, the experiment must be repeated on control units of the material and that all material used in experiments must be selected at random from the whole population it intends to represent. He also developed the concept of the analysis of variance, a statistical procedure used to design experiments that answer several questions at once.
Learn more about Fisher, Sir R(onald) A(ylmer) with a free trial on Britannica.com.
(born Feb. 27, 1867, Saugerties, N.Y., U.S.—died April 29, 1947, New Haven, Conn.) U.S. economist best known for his work in the field of capital theory. He received his Ph.D. from Yale University. As a professor at Yale (1892–1935), he examined the relationship between changes in the quantity of money and the general level of prices. He also promoted the concept of the “compensated dollar”—a dollar of constant purchasing power, defined in terms of an index of commodity prices rather than in terms of a given weight of gold. Seealso price index.
Learn more about Fisher, Irving with a free trial on Britannica.com.
(born April 9, 1758, Dedham, Mass.—died July 4, 1808, Dedham, Mass., U.S.) U.S. essayist and Federalist politician. He graduated from Harvard College in 1774 and taught school for five years before turning to the law; he was admitted to the bar in 1781. Supporting the creation of a strong central government, Ames argued for ratification of the new U.S. Constitution at the Massachusetts constitutional convention. He became known for his uncompromising advocacy of the rights of property and his protective attitude toward commercial interests, which he defended in trenchant writing and commanding speech. In 1788 he defeated Samuel Adams for a seat in the first session of the U.S. House of Representatives; he was reelected three times. His eloquent support of the treaty negotiated by John Jay to preserve peace with England (1794) convinced the House to pass an enabling appropriation.
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(born April 9, 1758, Dedham, Mass.—died July 4, 1808, Dedham, Mass., U.S.) U.S. essayist and Federalist politician. He graduated from Harvard College in 1774 and taught school for five years before turning to the law; he was admitted to the bar in 1781. Supporting the creation of a strong central government, Ames argued for ratification of the new U.S. Constitution at the Massachusetts constitutional convention. He became known for his uncompromising advocacy of the rights of property and his protective attitude toward commercial interests, which he defended in trenchant writing and commanding speech. In 1788 he defeated Samuel Adams for a seat in the first session of the U.S. House of Representatives; he was reelected three times. His eloquent support of the treaty negotiated by John Jay to preserve peace with England (1794) convinced the House to pass an enabling appropriation.
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The Martens constitute the genus Martes within the subfamily Mustelinae, in family Mustelidae. They are slender, agile, animals, adapted to living in taigas, and are found in coniferous and northern deciduous forests across the northern hemisphere. They have bushy tails, and large paws with partially retractile claws. The fur varies from yellowish to dark brown, depending on the species, and, in many cases, is valued by fur trappers. Martens are carnivorous animals related to wolverines, minks and weasels. Their diet consists of squirrels, mice, rabbits, birds, fish, insects, and eggs, and they will also eat fruit and nuts when these are readily available.
They are solitary animals, meeting only to breed in late spring or early summer. Litters of up to five blind and near-naked kits are born in early Spring. They are weaned after around two months, and leave the mother to fend for themselves at about three to four months of age.
Recent DNA research has shown that the genus Martes is in fact polyphyletic, placing Martes pennanti and Martes americana outside the genus and allying it with Eira and Gulo, to form a new New World clade. The genus first evolved up to seven million years ago, during the Pliocene.
The word for marten in Macedonian, Serbian, Polish, Slovene as well as Croatian is "kuna". This word has been adopted as the name of the national currency of Croatia.