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Nov 28

Another, Cottocomephorus grewingki, is referred to as the yellowfin, as it features bright, lemon-yellow pectoral fins that the males grow during mating. The largest lake in Russia, Baikal is a tectonic lake with a depth of over 1600 meters! (2016). They lie side by side bellies up, the male holds the female tight with his pectoral fin, and the female begins to spawn. The lake is the breeding ground for numerous subspecies of whitefish. fish from all over the world living only in lake Baikal. Because of these long fins one of the species, Cottocomephorus inermis, is called the longfin. At large depths, the cottoid fish are continuously affected by a high hydrostatic pressure, which can be up to 16,000 kPa! During the World War II the population of the Baikal sturgeon was decimated as people used it as a food source. [1][7] It is estimated that about 70% of the fish in the lake are golomyankas. It contains many fish species, including the Baikal Omul and the Baikal Sturgeon. Molecular evolution of the cottoid fish endemic to Lake Baikal deduced from nuclear DNA evidence. Here you can still find the world-class fishing and natural beauty for which the lake is famous. For example, the smalleye sculpin (Abyssocottus korotneffi), which is only 10 cm in length and about 10 g in weight, spawns 20–30 eggs 3.5–3.7 mm in diameter. The male starts making circles around her, moves his pectoral fins, the color of his head changing from olive drab to black, and even begins to emit sounds (!). The print version in Russian is published six times a year. T he crystal clarity of the waters in northern Lake Baikal never fails to amaze. These fish can often be found under rocks, in cracks and holes. Some would bite off eggs from the egg layings and get away with it. They have very thin porous bones, containing few minerals, which considerably reduces fish body weight. Hydrobiologia 568, Supplement 1: 111–114. Scientists from all over the world seek to learn more about cottoid fish, which are endemic to Lake Baikal — that means that they do not occur anywhere else. [12] They are considered the world's most abyssal freshwater fish, together with certain Lake Baikal deep-water sculpins (Abyssocottidae). Omuls are often slow to appear, but eventually they succumb to the light. They have a strong lateral line. With their seismic sensors thus developed, at large depths these fish better sense vibrations caused by predators, food organisms or conspecifics. The ancestors of cottoid fish emerged in the Far-Eastern seas of Russia. Even better-tasting than the omul is the Baikal lake sig, a sappy, fat fish weighing up to 12 pounds and more. Black umber is one of the most sought-after species among the fishermen. Lake Baikal is nothing short than a natural wonder. [8] They are the principal ecological competitor to the omul, which also eat small golomyankas, and represent a primary food source for the Baikal seal, at more than 90% of its diet. Some writers claim that due to the high fat content, staying in the sun may result in a complete meltdown of this fish! This system usually appears in the form of canals, which open outward using a special anatomical feature. At 636 km (395 mi) long and 79 km (49 mi) wide, Lake Baikal has the largest surface area of any freshwater lake in Asia, at 31,722 km 2 (12,248 sq mi), and is the deepest lake in the world at 1,642 m (5,387 ft). [2] Females are more common than males, which only make up about 32% of the population in the little Baikal oilfish and 17% in the big Baikal oilfish. "ГОЛОМЯНКИ, ЧАСТЬ 2: ОСОБЕННОСТИ СТРОЕНИЯ", "Baikal "shark": Amazing fact about the Baikal oilfish (golomyanka)", https://en.wikipedia.org/w/index.php?title=Comephorus&oldid=932853677, Creative Commons Attribution-ShareAlike License, This page was last edited on 28 December 2019, at 16:03. The rock should be large enough not to be disturbed by the waves, rest on a sand or small pebble bed; and there should be a cavern underneath of about 4 cm. We deployed an underwater camera near the nests safeguarded by the males. They bite so actively that one can catch 2 or 3 specimens at a time using a fishing rod equipped with several hooks down the line. The largest schools each of about 20 fish occur near the bottom. Currently, there are 59 species living in the lake, 27 of them are endemic, i.e. But how can they survive? Feeding ecology of two planktonic sculpins, Comephorus baicalensis and Comephorus dybowskii (Comephoridae), in Lake Baikal. As turned out, the deepwater cottoid fish can withstand up to 25,000 kPa, which is much higher than in the deepest part of Lake Baikal. And it comes to get caught! Lake Baikal, Russian Ozero Baykal, also spelled Ozero Bajkal, lake located in the southern part of eastern Siberia within the republic of Buryatia and Irkutsk oblast (province) of Russia.It is the oldest existing freshwater lake on Earth (20 million–25 million years old), as well as the deepest continental body of water, having a maximum depth of 5,315 feet (1,620 metres).

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