Sudak — one of the largest representatives of the perch family. It has a body length of about 60 cm and weighs 2 – 3 kg. But sometimes you can find individuals with a length of 120 – 130 cm and weigh up to 20 kg. pike has a body of cylindrical shape. Zander has a fin on the back with the pointy bone formations, reminiscent of needles. These formations are connected by a membrane with dark spots.
The back is painted in a greenish color; the sides and abdomen are silvery-white color. On the sides there are brown streaks total number to 12 pieces. Other fins, not counting the dorsal, greyish-yellow or pale yellow. Head rather narrow elongated horizontally, on its Gill cover no scales. Mouth wide and it has a large number of small and sharp teeth, also is sparsely planted fangs.
Generally pike live in lakes and ponds, with pure running water. Walleye are very sensitive to environmental change. If the river or lake is polluted with waste water, if you change the temperature, it can rise or fall. Also if he’s not getting enough oxygen (in the water pollution sludge), it leaves their homes. The best Zander river where a gentle current, fresh running water, springs and keys. In lakes prefers to stay deep places, places near cliffs or steep banks, but if there are a lot of piled driftwood, and stones then this is the best place for him. Zander likes sandy or clay bottom, tries to avoid floodplains, which are heavily overgrown by aquatic vegetation. In hot weather, the walleye may move at a medium depth.
The basis of the diet of pike perch is a small fish (gudgeon, bleak, etc.). Sudak has a great appetite. Pike feeds twice a day, starting early dawn and ends with sunrise. The walleye is a nocturnal predator, therefore he is resting by day. Starts feeding in the late evening and lasts until midnight, or even later. Peak of activity falls on the night.
It becomes sexually Mature when it reaches four to five years. Spawning begins when water temperatures reach 18 – 29 degrees. For spawning are harvested in small groups. The male initially chooses a place to spawn and clearing it. These sites are usually great depth the roots of shrubs and trees, but a place to spawn could be a small hole located in the sand. Walleye is distinguished by one feature – it takes care of its offspring. The female at one time is able to sweep away up to 1 million eggs. After spawning, the male remains near the place where the eggs, and protect their offspring. Perch deters from all the nests of other fishes and of their relatives too. The youth, who just came out from the eggs, can eat small organisms, large numbers of which live in the water. After a month the fry can eat smaller fish.
Despite this the high fecundity of females, but specimens were a small population. This comes from the fact that fry very often not enough food for normal growth, and they are in large numbers are dying of hunger.