Top definition. buck. 1.v: slang for the act of fighting. 2.v: slang for disagree'ing and feeling angry towards something. 3.n: slang for a young black man. 4.n: a male deer. 5.n: slang for money. 1. me: Ray was bucking at lunch..
Several species of sturgeon are harvested for their roe which is processed into caviarâa luxury food and the reason why caviar producing sturgeons are among the most valuable of all wildlife resources. They are particularly vulnerable to overexploitation and other threats, including pollution and habitat fragmentation. Most species of sturgeon are considered to be at risk of extinction, making them more critically endangered than any other group of species.
1 Sturgeons are related to the paddlefish and perhaps to the bichir. They have bony plates (scutes) covering the head and five longitudinal rows of similar plates along the body. 2  Sturgeons are found in greatest abundance in the rivers of southern Russia and Ukraine and in the freshwaters of North America.