|
Implantation
are an large family. According to the consulted works, there would exist between 32 and 70 species divided into inds. In Europe, inds are represented. The origin of would go up of and their distribution would date from the time of the Quaternary one. That would explain the wealth of the diversity of this group of fish, due to the insulation of groups of population during the glaciations of this time 70 013 years). In the absence of genetic data, it was at one time question of more than 100 species of . Science makes it possible today to specify the bill of material by defining with more precision the classification of approximately 44 species.
Blanc is in Great Britain and Ireland, in the mining area of the Volga and the Alpins lakes. It is present of number in the Finland Lakes.
Lifestyle
is a pelagic fish. Goshawks of the Baltic, N if Blanc lives not far from the sea, it goes up the rivers and rivers dice the autumn come to reproduce in cool water (approximately 3°C) from October at December. If the fertility of white is relatively low, it should be noted that the sexual maturity of this fish is early since effective dice the age of 1 year.
It is noted a great diversity in the mode of reproduction of in general. The choice of the spawning ground is variable but very often.
|
|
Scientific name:
Family:
Other names: White , Small , - English:
Maximum weight: 1,g (. 100 to 400 G)
Maximum length: 40 cm (. 15 to 20 cm)
Lifespan:
Period of abrasion: at December
Bridge: 19 800 to 25 900 ovocytes per kg of females
White with a lengthened body covered with rather large scales and a relatively small head. As whose are enough , one can note the presence of a fat fin. Their side line is well marked. The back is gray-blue or blue-green. The sides are rather silver plated and their belly of a characteristic silver plated white.
|
Other …
( will make)
()
Siberian ()
()
()
Sheet piling ()
|
directed towards sand funds or gravels. The duration of incubation depends closely on the temperature of the water which must be located at approximately 5°C
The blossoming occurs in April or May following the areas. The larvae require for their development a higher temperature about fifteen degree. This mailman, but as their with the predation, makes as larval mortality is relatively important.
consume Shellfish, and watery larvae of insects. It also happens that the fish eggs appear in its menu.
Fish
The , which profits from Protective measures (legal size of capture: 20cm), is generally fished March at July but the period varies according to the lakes and from the areas. It is a fish which one fishes in boat, preferably with “probed”, with tiny artificial larvae. Sometimes it is necessary to go to seek it with very important depths.
The lived in great number in until in the years 1920 and almost disappeared because of systematic which lasted several decades. They are massive alevin introductions which made it possible to reconstitute an important population in the Forties.
Today, the of is hardly captured than by the fishermen of leisure.
|
