Mustela zibellina Linnaeus, 1758
The sable (Martes zibellina) is a species of marten, a small omnivorous mammal primarily inhabiting the forest environments of Russia, from the Ural Mountains throughout Siberia, and northern Mongolia. Its habitat also borders eastern Kazakhstan, China, North Korea and Hokkaidō, Japan. Its range in the wild originally extended through European Russia to Poland and Scandinavia. Historically, it has been hunted for its highly valued dark brown or black fur, which remains a luxury good to this day. While hunting is still common in Russia, most fur on the market is now commercially farmed.
The name sable appears to be of Slavic origin and entered most Western European languages via the early medieval fur trade. Thus the Russian соболь (sobol) and Polish soból became the German Zobel, Dutch sabel; the French zibeline, Spanish cibelina, cebellina, Finnish soopeli, Portuguese zibelina and Mediaeval Latin zibellina derive from the Italian form (zibellino). The English and Medieval Latin word sabellum comes from the Old French sable or saible.
Males measure 38–56 centimetres (15–22 in) in body length, with a tail measuring 9–12 centimetres (3.5–4.7 in), and weigh 880–1,800 grams (1.94–3.97 lb). Females have a body length of 35–51 centimetres (14–20 in), with a tail length of 7.2–11.5 centimetres (2.8–4.5 in). The winter pelage is longer and more luxurious than the summer coat. Different subspecies display geographic variations of fur colour, which ranges from light to dark brown, with individual coloring being lighter ventrally and darker on the back and legs. Japanese sables (known locally as クロテン or kuroten) in particular are marked with black on their legs and feet. Individuals also display a light patch of fur on their throat which may be gray, white, or pale yellow. The fur is softer and silkier than that of American martens. Sables greatly resemble pine martens in size and appearance, but have more elongated heads, longer ears and proportionately shorter tails. Their skulls are similar to those of pine martens, but larger and more robust with more arched zygomatic arches.
Sables inhabit dense forests dominated by spruce, pine, larch, cedar, and birch in both lowland and mountainous terrain. They defend home territories that may be anything from 4 to 30 square kilometres (1.5 to 11.6 sq mi) in size, depending on local terrain and food availability. However, when resources are scarce they may move considerable distances in search of food, with travel rates of 6 to 12 kilometres (3.7 to 7.5 mi) per day having been recorded.
Sables live in burrows near riverbanks and in the thickest parts of woods. These burrows are commonly made more secure by being dug among tree roots. They are good climbers of cliffs and trees. They are primarily crepuscular, hunting during the hours of twilight, but become more active in the day during the mating season. Their dens are well hidden, and lined by grass and shed fur, but may be temporary, especially during the winter, when the animal travels more widely in search of prey.
Sables are omnivores, and their diet varies seasonally. In the summer, they eat large numbers of hare and other small mammals. In winter, when they are confined to their retreats by frost and snow, they feed on wild berries, rodents, hares, and even small musk deer. They also hunt ermine, small weasels and birds. Sometimes, sables follow the tracks of wolves and bears and feed on the remains of their kills. They eat molluscs such as slugs, which they rub on the ground in order to remove the mucus. Sables also occasionally eat fish, which they catch with their front paws.
They hunt primarily by sound and scent, and they have an acute sense of hearing. Sables mark their territory with scent produced in glands on the abdomen. Predators of sable include a number of larger carnivores, such as wolves, foxes, wolverines, tigers, lynxes, eagles and large owls.
Mating generally occurs between June and August 15, though the date varies geographically. When courting, sables run, jump and "rumble" like cats. Males dig metre long shallow grooves in the snow, frequently accompanied by urination. Males fight each other violently for females. Females enter estrus in spring. Mating can last as long as eight hours. After insemination, the blastocyst does not implant into the uterine wall of the female. Instead, implantation occurs eight months later; although gestation lasts 245 to 298 days, embryonic development requires only 25–30 days. Sables birth in tree hollows, where they build nests composed of moss, leaves, and dried grass. Litters number one to seven young, although litters of two or three are most common. Males assist females by defending their territories and providing food.
Sables are born with eyes closed and skin covered in a very thin layer of hair. Newborn cubs weigh between 25 and 35 grams (0.88 and 1.23 oz) and average 10 to 12 centimetres (3.9 to 4.7 in) in length. They open their eyes between 30 and 36 days, and leave the nest shortly afterwards. At seven weeks, the young are weaned and given regurgitated food. They reach sexual maturity at the age of two years. They have been reported to live for up to twenty two years on fur farms, and up to eighteen years in the wild.
Sables can interbreed with pine martens. This has been observed in the wild, where the two species overlap in the Ural Mountains, and is sometimes deliberately encouraged on fur farms. The resulting hybrid, referred to as a kidus, is slightly smaller than a pure sable, with coarser fur, but otherwise similar markings, and a long bushy tail. Kiduses are typically sterile, although there has been one recorded instance of a female kidus successfully breeding with a male pine marten.
In Russia, the sable's distribution is largely the result of mass re-introductions involving 19,000 animals between 1940 and 1965. Their range extends northward to the tree line, and extends south to 55–60° latitude in western Siberia, and 42° in the mountainous areas of eastern Asia. Their western distribution encompasses the Ural mountains, where they are sympatric with the European pine marten. They are also found on Sakhalin.
In Mongolia, sables occur in the Altai Mountains and in the surrounding forests of Lake Hovsgol, the latter being contiguous with the Trans-Baikal boreal forest region from which the most valuable sable pelts come. In China, sables occur in a limited area of the Xinjiang Uygur Autonomous Region. In northeastern China, sables are now limited to the Greater Khingan Range. In eastern Heilongjiang, the persistence of sables is suspected in the Lesser Khingan Range. Sables also occur in Hokkaido and on the Korean peninsula.
Because of the variable appearance of the sable in different geographic localities, there has been some debate over the exact number of subspecies that can be clearly identified. Mammal Species of the World recognises seventeen different subspecies, but other recent scholarly sources have identified anything from seven to thirty.
History of fur use and status
Sable fur has been a highly valued item in the fur trade since the early Middle Ages, and is generally considered to have the most beautiful and richly tinted pelt among martens. Sable fur is unique because it retains its smoothness in every direction it is stroked. The fur of other animals feels rough stroked against the grain. A wealthy 17th-century Russian diplomat once described the sable as "A beast full marvelous and prolific ... a beast that the Ancient Greeks and Romans called the Golden Fleece." Russian sables would typically be skinned over the mouth with no incision being made on the body. The feet would be retained, so as to keep as much fur as possible. Byzantine priests would wear sable for their rituals.
In England, sable fur was held in great esteem. Henry I was presented with a wreath of black sable by the Bishop of Lincoln, for no less than £100, a considerable sum at the time. Sable fur was a favourite of Henry VIII, who once received five sets of sable fur worth £400 from Emperor Charles V. Henry later decreed that sable fur was to be worn only by nobles exceeding the rank of viscount. The Russian conquest of Siberia was largely spurred by the availability of sables there. Ivan Grozny once demanded an annual tribute of 30,000 sable pelts from the newly conquered Kazan Tatars, though they never sent more than a thousand, as Russia at the time was unable to enforce the tribute due to wars with Sweden and Poland. The best skins were obtained in Irkutsk, Kamchatka, and Lapland.
According to the Secret History of the Mongols, when Genghis Khan married his first wife, Börte Ujin, his mother Hoelun received a coat of sable furs from the girl's parents. This was reportedly a very noble gift, serving not only an aesthetic need but also a practical one.
According to Atkinson's Travels in Asiatic Russia, Barguzin, on Lake Baikal, was famed for its sables. The fur of this population is a deep jet black with white tipped hair. Eighty to ninety dollars were sometimes demanded by hunters for a single skin. In 1916, the first nature reserve in the Russian Empire was created—known as the Barguzin Nature Reserve—precisely to preserve and increase the numbers of Barguzin sable. Sable fur would continue to be the most favoured fur in Russia, until the discovery of sea otters in the Kamchatka peninsula, whose fur was considered even more valuable. Sable furs were coveted by the nobility of the Russian Empire, with very few skins ever being found outside the country during that period. Some, however, would be privately obtained by Jewish traders and brought annually to the Leipzig fair. Sometimes, sable hunting was a job given to convicts exiled to Siberia.
Imperial Russian fur companies produced 25,000 skins annually, with nearly nine tenths of the produce being exported to France and Germany. The civic robes of the Lord Mayor and Corporation of London, which were worn on State occasions, were trimmed with sable. As with minks and martens, sables were commonly caught in steel traps. Intensified hunting in Russia in the 19th and early 20th century caused a severe-enough decline in numbers that a five-year ban on hunting was instituted in 1935, followed by a winter-limited licensed hunt. These restrictions together with the development of sable farms have allowed the species to recolonize much of its former range and attain healthy numbers.
The Soviet Union allowed Old Believer communities to continue their traditional way of life on the condition that they hand over all sable skins they produced. The dissolution of the Soviet Union led to an increase of hunting and poaching in the 1990s, in part because wild caught Russian furs are considered the most luxurious and demand the highest prices on the international market. Currently, the species has no special conservation status according to the IUCN, though the isolated Japanese subspecies M. zibellina brachyurus is listed as "data-deficient".
Because of its great expense, sable fur is typically integrated into various clothes fashions: to decorate collars, sleeves, hems and hats (see, for example the shtreimel). The so-called kolinsky sable-hair brushes used for watercolour or oil painting are not manufactured from sable hair, but from that of the Siberian weasel.
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