Siberian fur trade to overhunting. Instead of one sable pelt, the following was accepted as its equivalent: one fox, glutton (relative of the marten), or otter pelt; two blue-fox pelts; sixteen polar-fox pelts; or one hundred squirrel pelts. The Russian government decided the amount of other pelts that were equivalent to the sable pelt. Within forty years, almost all Siberian natives were forced into paying fur tribute to the Russians. Russian traders, hunters, and explorers reached the Pacific coastline by 1650 and were collecting fur tribute from most natives along the coast. Beyond the yasuk, the Russians had two principal ways of obtaining
Beech marten fissures and clefts in rocks, spaces between stones in rock slides and inhabited or uninhabited stone structures. It may live in tree holes at a height of up to 9 metres. Estrus and copulation occur at the same time as in the pine marten. Copulation can last longer than 1 hour. Mating occurs in the June–July period, and takes place in the morning or in moonlit nights on the ground or on the roofs of houses. The gestation period lasts as long as the pine marten's, lasting 236–237 days in the wild, and 254–275 days in fur farms. Parturition takes