Monday, 21 November 2011

Fishes of Belarus Reservoirs


On August 18, 2011 the Ministry of Communications and Information of the Republic of Belarus issued 2 postage stamps of the series “Fishes of Belarus reservoirs”. The  depicted species  are Burbot, and Pike

The burbot (Lota lota) is the only gadiform (cod-like) fish inhabiting freshwaters.The burbot is a tenacious predator, which will sometimes attack other fish that are almost the same size and as such can be a nuisance fish in waters where it is not native.

The burbot is edible.the liver of the burbot has 3 to 4 times the potency in vitamin D, and 4 to 10 times in vitamin A, than “good grades” of cod-liver oil.

Pike or Esox lucius is found in freshwater throughout the northern hemisphere, including Russia, Europe and North America.
Northern pike are most often olive green, shading from yellow to white along the belly. The flank is marked with short, light bar-like spots and there are a few too many dark spots on the fins.

Sometimes the fins are reddish. the northern pike has light markings on a dark body background and fewer than six sensory pores on the underside of each side of the lower jaw.
Pike grow to a relatively large size; lengths of 150 centimetres and weights of 25 kilograms .Pike are found in sluggish streams and shallow, weedy places in lakes, as well as in cold, clear, rocky waters. 


Pike are typical ambush predators; they lie in wait for prey, holding perfectly still for long periods and then exhibit remarkable acceleration as they strike.
Because of their cannibalistic nature, young pike need places where they can take shelter between plants so they are not eaten.Pikes are seldom found in brackish water, except for the Baltic Sea area. Pike is known to prefer water with less turbidity.Pike are among the largest freshwater fish.

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