Aquarium fish – catfish.
Under the collective name of soma mean — more than 2,000 species of baleen variety of fishes from 31 families. Most of them inhabit freshwater reservoirs 5 continents (only 1% of marine residents). Only in the rivers and lakes of South America is home to about 1000 species. often the body of the fish is covered with bony plates, or protected by spikes. Thanks to the auxiliary respiratory organs (skin, outgrowths of the Gill bars, etc.) soma is not drawoutline to oxygen. They are predominantly benthic lifestyle returnee also be armed and at night.
Ordinary som belongs to a 5-meter high giants, and a parasitic catfish no larger than 2.5 cm Elektroniskie soma can cause significant shocks, and castkova, kilbowie, etc. the vibration fins, swim bladder, etc. can make sounds. Attached to the bottom substrate by using the suction cups loricaria. security, etc. are held in swift current And blind Satan, Trogloglanis (South America) and Ugittflanis (Africa) settled deep underground in caves and artesian basins. Among them are quite transparent glass Physailia catfish, Tandanus, Parailia and others).
In aquariums contain up to 800 species. Conditions: 6-12 DH, pH 6,8-7,5, T 22-26 gr.With. aeration filtration, water change (1/10 of a day); better aquariums with a large area of the bottom; water plants with an extensive root system; soil – rounded gravels 5-10 mm in diameter. The incentive to reproduction is sprinkling (from nikolkina to one month), increasing water temperature, availability of substrate (vegetation, ceramic tube, pesenki of stones, etc.). Mature catfish of 1-3 years. accelerate the maturation of intramuscular injections of pituitary gland (2-4 mg/kg) and gonadotropin (100-200 units). males are usually slimmer than females and have additional signs: increased fins, skin growths, ukrupnenie head. >
For spawning species utilize small aquariums with a capacity of 20-50 liters for large 100-500 liters. Spawning usually seasonal. Many catfish guard the offspring: Galeichthys felis carries the eggs in her mouth, Aspredo attaches it to the abdominal wall, and Trachycorystes, with internal fertilization. The incubation period is 1-10 days. Productivity kolebletsya in the range of 50-30, 000 eggs. They feed mainly on animal food. but there are fans of plant growth, organic debris, etc. the Juveniles feed rotifers, micro worm, Tubifex crushed, pulverized egg yolk, liver, etc. In aquariums lives from 3 to 25 years.