Ossetra dwells another type of sturgeon, Siberian sturgeon ("Acipenser Baerii"), which is farmed all over the world because it can adapt to a wider range of habitats. It begins to produce caviar faster than "Acipenser gueldenstaedtii". Throughout the entire history of black caviar consumption, reference to Ossetra was made only to the fish that was caught first in Imperial Russia, then the USSR, and now in the Russian Federation. Today, Caspian Ossetra is facing extinction in its native habitat. Farming sturgeon is the only way to continue the production of high-quality caviar. Continuous drastic declines in natural sturgeon populations over the
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