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
Caudron Types M and N Caudron Types M and N The Caudron Types M and N were small, fast French sports monoplanes, flown 1911–13 under a wide range of engine powers. There was also a military version. Although almost all the aircraft designed by the Caudron brothers in the twenty years from their first attempts in 1908 were biplanes, they did in 1911-2 produce three monoplane types. These were the single seat racing Types M and N and the related but somewhat larger Type M2 military version. The Types M and N were very similar and, though the designations were reported together with some details