Sunday, December 26, 2010

December 26, 2010 : Taimen


The taimen (
Hucho taimen), also known as Siberian taimen and Siberian salmon, is a species of fish in the salmon family (family Salmonidae) of order Salmoniformes.

The taimen is distributed from the Volga and Pechora River basins east to the Yana River in the north and that of the Amur River in the south. On a larger scale, this includes parts of the Caspian and Arctic drainages in Eurasia and portions of the Pacific drainage in Mongolia and Russia (the Amur River). In Mongolia the taimen is found in both the Arctic and Pacific drainages, specifically the Yenisei/Selenga, the Lena, and the Amur River Basins. The taimen lives in flowing water and is only occasionally found in lakes, usually near the mouth of a tributary. The taimen is not anadromous, but does show increased movement rates during the spawning season. The average home range size of taimen in the Eg-Uur River of Mongolia is 23km, but some tagged individuals show home ranges up to 93km. Some authors consider the taimen to be a subspecies of the Huchen, i.e. Hucho hucho taimen.

Coloration varies geographically, but is generally olive green on the head blending to reddish brown in the tail. Adipose, anal, and caudal fins are often dark red. The belly ranges from nearly white to dark gray. The taimen is the largest salmonid in the world. The maximum size is not well known, but a fish caught in the Kotui River in Russia with a length of 210 cm (83 in) and a weight of 105 kg (231 lb) is the largest reliable record (Holcik et al. 1988). The IGFA world record is a little under 100 lb or 45 kg. It can reach at least 55 years of age.

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