Lake Qinghai naked carp (gymnocypris przewalskii) is Cypriniformes, Cyprinidae, subfamily Schizothorax, naked carp is.
Commonly known as: Huang fish, mackerel pike, fish without scales.
Lavin Species: gymnocypris przewalskii
English species name: naked carp
Qinghai Lake and its water distribution area, Inner Mongolia was introduced in 1970. Low salinity of the waters for the fish.
Lake Qinghai naked carp is cold water fish. Like to live in shallow water, also common in beach areas or large water side whirl among the rubble where moderate water, winter is the potential resident pools, rock crevices. Adaptability of the living conditions are not strict requirements, smaller reservoirs and shallow lake can live in brackish water can also be life. After hatching larvae, which swim in groups, mostly clustered in the estuarine shallow water region. Larval stage of the staple food of animal feed; into omnivorous fish, plants and animals in Qinghai Lake in all its foodstuffs are the main food object of diatoms, copepods, cladocerans, rotifers, Amphipoda, aquatic insects, chironomid larvae, and even the juvenile fish and loach of whom are also swallowed. As the Qinghai Lake is located in the 3000-meters on the plateau, the water temperature is low, poor diets and short growing season, biological and therefore slow-growing fish, in addition to first year students up to 3.5 cm, the life of the body length growth no stage 4 rapid growth in the following weight age, weight 250 grams average age 8-9, 500 grams of about 10 old; generally grow to 50-60 cm and weighs about 5 kg, age 25; maximum individual length of up to 95 cm , weighing about 6.5 kg. Groups in the male than female, lower fertility, fecundity averaged 16,242. Obvious reproductive migration each year in late March to August from the lake into the river to breed. Spawning sites is generally slow moving, sediment of gravel, pebbles, or spinning, in the 0.1-1.1 m depth of crystal-clear river. During the breeding season, when the water temperature less than or more than 17.5 ℃ 6 ℃, they no breeding activity. Spawning season is mid-May to mid-June; spawning activity is carried out day and night, with 23 am to 3 pm the next day as the most exuberant; eggs in the nest together eggs, egg sinking, slightly sticky.
Distributed in the Qinghai Lake and its tributaries, Lake Crook, Zaling, Eling has produced. It is extremely important economic fish species in Qinghai Province. Since the 1960s began, dozens of acres of grassland around the lake have been reclaimed as farmland; into the lake of 108 artificially damming the river, blocking the propagation channel, drying up many rivers dried up, resulting in Huang unable to freshwater fish spawning, resulting in a large number of fish in the estuary areas Huang death. The data indicate that the existing Huang Qinghai Lake is about 7500 tons of fish resources, lack of development of the early 1 / 10, and the present, Bird habitat of birds to devour nearly 1000 tons per year of Huang fish, fish resources, the failure invisible Huang convinces a serious threat to the survival of birds. |
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