The study of increasing production of warm water fish per unit area in West Azarbaijan Province with using aeration and nutrition management

This project in partnership with Azerbaijan State Fisheries Department and the aim of increasing fish production hydrothermal (Carp fish) at unit area through providing scientific and practical method in applying air device and nutrition management, a field area of 8.5 hectares and in ponds with 3300 m^2 at village Eylarzgy carried at Urmia city. After preparation of ponds, action to release fry density was 6000 ha piece. Percent including 55 percent of silver carp (as most fish), Common carp 31 percent, 8 percent Grass carp and 6 percent of Big head with average weights 67 to 92 grams respectively. For fertilizing ponds in addition to basic fertilizer, during development, organic fertilizers (cow) amount to 24 ton/ hectar (Aslary) once every two days and types of mineral fertilizers (chemical) rate of 1012.5 kg per in three days once were used. In addition to feeding carp fish with natural food, concentrates and food for feeing Grass carp fresh forage (alfalfa) was used. Oxygen supply required for ponds were provided with one to two air units (Air jet). Sampling and biometry of fish and water samples for water analysis and identification of plant zooplankton (of the family and genus) once every month until the end of the growing period was performed. Resulting data were analyzed with Excel statistical software. Results showed that the production rate in the studied ponds was 4.74 tons per hectare and production of 3.15 tons per hectare in year ago, the farm has 50.5 percent increase compared to year ago average production rate in the whole province (3.21 tons per hectare) of 47.7 percent and the average production rate in the country in 1385 (about 3.8 tons per hectare) 24.7 percent increase shows