Fur trade marten furs could generate in international markets spurred a "fur fever" in which many Russians moved to Siberia as independent trappers. From 1585 to 1680, tens of thousands of sable and other valuable pelts were obtained in Siberia each year. The primary way for the Muscovite state to obtain furs was by exacting a fur tribute from the Siberian natives, called a "yasak". "Yasak" was usually a fixed number of sable pelts which every male tribe member who was at least fifteen years old had to supply to Russian officials. Officials enforced "yasak" through coercion and by taking hostages, usually
European pine marten European pine marten The European pine marten ("Martes martes"), known most commonly as the pine marten in Anglophone Europe, and less commonly also known as pineten, baum marten, or sweet marten, is an animal native to Northern Europe belonging to the mustelid family, which also includes mink, otter, badger, wolverine, and weasel. Their bodies are up to in length, and their bushy tails can be . Males are slightly larger than females; typically, martens weigh around - . Their fur is usually light to dark brown and grows longer and silkier during the winter, while being short and coarse in