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Omul
The omul, ''Coregonus migratorius'', also known as Baikal omul (russian: байкальский омуль), is a whitefish species of the salmon family endemic to Lake Baikal in Siberia, Russia. It is considered a delicacy and is the object of one of the largest commercial fisheries on Lake Baikal. In 2004, it was listed in Russia as an endangered species. Taxonomy The omul has traditionally been regarded as a subspecies of the Arctic cisco ''Coregonus autumnalis''. However, recent genetic studies have shown it actually belongs to the circumpolar '' Coregonus lavaretus- clupeaformis'' complex of lake whitefishes, which also has other members in Lake Baikal, and it is now considered its own species within ''Coregonus''. The four or five traditionally accepted subpopulations of omul within Lake Baikal are: North Baikal (северобайкальский), Selenga (селенгинский), Chivyrkui (чивыркуйский) and Posolsk (посольский). These vary in s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Baikal
Lake Baikal (, russian: Oзеро Байкал, Ozero Baykal ); mn, Байгал нуур, Baigal nuur) is a rift lake in Russia. It is situated in southern Siberia, between the federal subjects of Irkutsk Oblast to the northwest and the Republic of Buryatia to the southeast. With of water, Lake Baikal is the world's largest freshwater lake by volume, containing 22–23% of the world's fresh surface water, more than all of the North American Great Lakes combined. It is also the world's deepest lake, with a maximum depth of , and the world's oldest lake, at 25–30 million years. At —slightly larger than Belgium—Lake Baikal is the world's seventh-largest lake by surface area. It is among the world's clearest lakes. Lake Baikal is home to thousands of species of plants and animals, many of them endemic to the region. It is also home to Buryat tribes, who raise goats, camels, cattle, sheep, and horses on the eastern side of the lake, where the mean temperature var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trans-Siberian Railway
The Trans-Siberian Railway (TSR; , , ) connects European Russia to the Russian Far East. Spanning a length of over , it is the longest railway line in the world. It runs from the city of Moscow in the west to the city of Vladivostok in the east. During the period of the Russian Empire, government ministers—personally appointed by Alexander III and his son Nicholas II—supervised the building of the railway network between 1891 and 1916. Even before its completion, the line attracted travelers who documented their experiences. Since 1916, the Trans-Siberian Railway has directly connected Moscow with Vladivostok. , expansion projects remain underway, with connections being built to Russia's neighbors (namely Mongolia, China, and North Korea). Additionally, there have been proposals and talks to expand the network to Tokyo, Japan, with new bridges that would connect the mainland railway through the Russian island of Sakhalin and the Japanese island of Hokkaido. Route descrip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Gottlieb Georgi
Johann Gottlieb Georgi (31 December 1729 – 27 October 1802) was a German botanist, naturalist and geographer. A native of Pomerania, Georgi accompanied both Johan Peter Falk and Peter Simon Pallas on their respective journeys through Siberia. During 1770-1774 he travelled on its behalf to Astrakhan, the Urals, Bashkir, the Barabinsk steppe, the Kolyvanskoe silver mines (to assess the ore content), Altai, Tomsk, Irkutsk, Baikal, and Dauren. In 1783 he became an academician of the Russian Academy of Sciences in St Petersburg. Georgi was particularly interested in the Baikal region. Based on collections from far eastern Russia, in his 1775 publication ''Bemerkungen einer Reise im Russischen Reich im Jahre 1772'', Georgi provided the first botanical descriptions of many of the region's flowering plants, among them the Baikal skullcap (''Scutellaria baicalensis''). Many of these plants and herbs were later collected by European botanists in China, and thereafter became rare sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Of Lake Baikal
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. Most fis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stroganina
300px, Prepared ''stroganina'' on a table ''Stroganina'' (Russian строганина, literally "shavings") is a dish of the northern Russians and indigenous people of northern Arctic Siberia consisting of raw, thin, long-sliced frozen fish. Around Lake Baikal, the dish is referred to as ''raskolotka''. Traditional ''stroganina'' is made with freshwater whitefish salmonids found in the Siberian Arctic waters such as nelma, muksun, chir, and omul. Rarely, it is made with sturgeon. This dish is popular with native Siberians, and is present in Yakutian cuisine, Eskimo cuisine, Komi cuisine and Yamal cuisine. It is often paired with vodka. Ingredients and preparation Frozen fish is used for the preparation of ''stroganina''. The fish for ''stroganina'' is usually caught by ice fishing during the late fall and fresh frozen in order to avoid the formation of ice crystals in the meat. Frozen fish can be glazed with near-freezing ice water in order to avoid dehydration and better- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melosira
''Melosira'' is a genus of diatoms belonging to the family Melosiraceae. The genus has cosmopolitan distribution, and inhabits both freshwater and marine habitats. Species Species: *'' Gaillonella ampla'' *'' Gaillonella apiculata'' *'' Gaillonella asperula'' *'' Gaillonella biseriata'' *'' Gaillonella borei'' *'' Gaillonella californica'' *'' Gaillonella calligera'' *'' Gaillonella campylosira'' *'' Gaillonella capsularis'' *'' Gaillonella carinata'' *'' Gaillonella circularis'' *'' Gaillonella coarctata'' *'' Gaillonella comoides'' *'' Gaillonella corneola'' *'' Gaillonella coronata'' *'' Gaillonella crenata'' *'' Gaillonella crotonensis'' *'' Gaillonella cuneata'' *'' Gaillonella curvata'' *'' Gaillonella decussata'' *'' Gaillonella digitus'' *'' Gaillonella discoplea'' *'' Gaillonella distans'' *'' Gaillonella ferruginea'' *'' Gaillonella gallica'' *'' Gaillonella gemmata'' *'' Gaillonella gibba'' *'' Gaillonella glomerata'' *'' Gaillonella hal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alga
Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular microalgae, such as ''Chlorella,'' ''Prototheca'' and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga which may grow up to in length. Most are aquatic and autotrophic (they generate food internally) and lack many of the distinct cell and tissue types, such as stomata, xylem and phloem that are found in land plants. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the ''Charophyta'', a division of green algae which includes, for example, ''Spirogyra'' and stoneworts. No definition of algae is generally accepted. One definition is that algae "have chlorophyll ''a'' as their primary photosynthetic pigment and lack a sterile covering of cells around t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selenga River
The Selenga or Selenge ( ; bua, Сэлэнгэ гол / Сэлэнгэ мүрэн, translit=Selenge gol / Selenge müren; russian: Селенга́, ) is a major river in Mongolia and Buryatia, Russia. Originating from its headwater tributaries, the Ider and the Delger mörön, it flows for before draining into Lake Baikal. The Selenga therefore makes up the most distant headwaters of the Yenisey- Angara river system. Carrying of water into Lake Baikal, it makes up almost half of the riverine inflow into the lake, and forms a wide delta of when it reaches the lake. Periodic annual floods are a feature of the Selenga River. The floods can be classified as “ordinary”, “large” or “catastrophic” based on the degree of impact. Of the twenty-six documented floods that occurred between 1730 and 1900, three were “catastrophic”. The three “catastrophic” floods were the floods of 1830, 1869 and 1897. The Selenga River basin is a semi-arid region that is in are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iteroparous
Semelparity and iteroparity are two contrasting reproductive strategies available to living organisms. A species is considered semelparous if it is characterized by a single reproductive episode before death, and iteroparous if it is characterized by multiple reproductive cycles over the course of its lifetime. Iteroparity can be further divided into continuous iteroparity (primates including humans and chimpanzees) and seasonal iteroparity (birds, dogs, etc.) Some botanists use the parallel terms monocarpy and polycarpy. (See also plietesials.) In truly semelparous species, death after reproduction is part of an overall strategy that includes putting all available resources into maximizing reproduction, at the expense of future life (see § Trade-offs). In any iteroparous population there will be some individuals who die between their first and second reproductive episodes, but unless this is part of a syndrome of programmed death after reproduction, this would not be called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benthic Zone
The benthic zone is the ecological region at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. The name comes from ancient Greek, βένθος (bénthos), meaning "the depths." Organisms living in this zone are called benthos and include microorganisms (e.g., bacteria and fungi) as well as larger invertebrates, such as crustaceans and polychaetes. Organisms here generally live in close relationship with the substrate and many are permanently attached to the bottom. The benthic boundary layer, which includes the bottom layer of water and the uppermost layer of sediment directly influenced by the overlying water, is an integral part of the benthic zone, as it greatly influences the biological activity that takes place there. Examples of contact soil layers include sand bottoms, rocky outcrops, coral, and bay mud. Description Oceans The benthic region of the ocean begins at the shore line (intertida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zooplankton
Zooplankton are the animal component of the planktonic community ("zoo" comes from the Greek word for ''animal''). Plankton are aquatic organisms that are unable to swim effectively against currents, and consequently drift or are carried along by currents in the ocean, or by currents in seas, lakes or rivers. Zooplankton can be contrasted with phytoplankton, which are the plant component of the plankton community ("phyto" comes from the Greek word for ''plant''). Zooplankton are heterotrophic (other-feeding), whereas phytoplankton are autotrophic (self-feeding). This means zooplankton cannot manufacture their own food but must eat other plants or animals instead — in particular they eat phytoplankton. Zooplankton are generally larger than phytoplankton, most are microscopic, but some (such as jellyfish) are macroscopic and can be seen with the naked eye. Many protozoans (single-celled protists that prey on other microscopic life) are zooplankton, including zooflagellates, fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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