Six sturgeon species are found in the Caspian Sea and its drainage basin: Russian sturgeon (Acipenser gueldenstaedtii), Persian sturgeon (A. persicus), Stellate sturgeon (A. stellatus), Ship sturgeon (A. nudiventris), Sterlet (Acipenser ruthenus) and Beluga (Huso huso). The bulk of the world’s remaining stock of wild sturgeon resources is found in the Caspian, which also accounted…