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The Ladoga is rich with fish. 48 forms (species and infra specific taxa) of fish have been encountered in the lake, including roach, carp bream, zander, European perch, ruffe, endemic variety of smelt, two varieties of Coregonus albula (vendace), eight varieties of Coregonus lavaretus, a number of other Salmonidae as well as, albeit rarely ...
Lake Ladoga is the largest lake in Europe, with total area encompassing 17,890 km (11,120 mi); it has various fishes. [2] In the post-World War I era, the lake became popular among tourists. [3] The earliest proposal for creation of a national park was proposed by Karelian Research Centre of RAS in late 1980s. [4]
Sevan trout. The Sevan trout (Salmo ischchan) is an endemic fish species of Lake Sevan in Armenia, known as ishkhan (իշխան, pronounced [iʃˈχɑn]) in Armenian. It is a salmonid fish related to the brown trout. The fish is endangered, because various competitors were introduced into the lake during the Soviet period, including common ...
Topography and hydrography. Lake Onega has a surface area of 9,891 km 2 (3,819 sq mi) without islands and a volume of 291 km 3 (70 cu mi); its length is about 245 km (152 mi) and width about 90 km (56 mi). It is the second largest lake in Europe, and the 18th largest lake by area in the world. Its southern banks are mostly low and continuous ...
Coregonus widegreni, also called the Valaam whitefish, is a putative species of freshwater whitefish, a part of the common whitefish complex ( Coregonus lavaretus sensu lato) from Northern Europe. It is a demersal form of freshwater whitefish that feeds on benthic invertebrates. [2] It spawns in late autumn, and can reach a length of 55 cm ...
In addition are several species of fish, including Salvelinus salvelinus, Coregonus lavaretus and Salmo salar. The lake is known for its Vättern char, as it is called, Salvelinus alpinus. [11] The Vättern char is genetically close to the Sommen char in nearby Lake Sommen and chars of Lake Ladoga in Russia. [12]
A lake in the Republic of Karelia. There are 60,000 lakes in Karelia. The republic's lakes and swamps contain about 2,000 km 3 of high-quality fresh water. Lake Ladoga (Finnish: Laatokka) and Lake Onega (Ääninen) are the largest lakes in Europe. Other lakes include: Nyukozero (Nuokkijärvi) Pyaozero (Pääjärvi) Segozero (Seesjärvi)
It is native to Lake Onega and Lake Ladoga in Karelia, but it has been introduced to many other water bodies in Russia. It eats benthic larvae, molluscs and crustaceans, but in the summer it usually switches to feed on zooplankton. It was originally described in 1916 by Lev Berg as Coregonus widegreni ludoga.