Sterlet Sterlet The sterlet ("Acipenser ruthenus") is a relatively small species of sturgeon from Eurasia native to large rivers that flow into the Black Sea, Azov Sea, and Caspian Sea, as well as rivers in Siberia as far east as Yenisei. Populations migrating between fresh and salt water (anadromous) have been extirpated. Due to overfishing (for its flesh, caviar, and isinglass), pollution, and dams, the sterlet has declined throughout its native range and is considered vulnerable by the IUCN. Restocking projects are ongoing, and it has been introduced to some regions outside its native range, but the latter have generally not
The Three Types of Legitimate Rule and they directly contribute to the state system stability and authority. All rulers have an explanation for their superiority, an explanation that is commonly accepted but during a crisis can be questioned. Weber sees only three categories of legitimation strategies (which he calls "pure types") used to justify the right of rulers to rule: The types of authority change over time, when the ruled are no longer satisfied with the system. For example, after the death of a charismatic leader his followers, if they lack the charisma of their predecessor, will try to institute a system based on tradition or