Abstract The sturgeon breeding system in concrete ponds is one of the best breeding systems in the world. Although this is a common breeding method, prefabricated tanks are also used in many countries. In order to evaluate the growth of A. stellatus fish during an 8-month breeding period (May to December), a number of 480 A. stellatus fish with an average initial weight of 825.5 grams were placed in 4 circular concrete ponds with a diameter of 6 meters, a height of 2 meters, and a drainage depth of approximately 5.5 1 meter and a density of 3.5 kilograms per square meter with an area of 28 square meters and were fed and raised using the salty water of the Caspian Sea. In the study of various effective factors in the growth and feeding of fish, water temperature, breeding environment conditions and fish size are among the important influencing parameters that should be taken into consideration in determining the feeding percentage. The level of nutrition has a significant effect on the efficiency and conversion rate of food. Research has shown that usually in feeding sturgeon during the growth period, food containing 35-45% protein, 12-16% fat should be used. According to the researches, the most appropriate percentage of feeding in the spring season when the fish had a suitable growth rate is 3-5% and in the fall season when the growth rate reached the maximum value, between 2-4% and in the summer and winter seasons when The fish does not have much growth, between 1.5-2% of body weight was considered. However, in this research, according to the environmental conditions and the decrease or increase in water temperature and with the aim of reducing the breeding costs, A. stellatus fishes were fed between 0.5-2% of their body weight per day during the breeding period. At the end of the breeding period, the final weight of A. stellatus reached from 825.5 grams to an average weight of 2650 grams. During this period, the weight of the initial and final fat was calculated as 396.2 and 1272 kg/m2 respectively, the amount of food consumed during the whole period was 850 kg and the average food conversion ratio was calculated as 1.8. Based on the results, the feeding ratio, temperature and fish size are the most important factors that influence fish growth. For the economic justification of nutrition, it is necessary to determine the feeding percentage and the food conversion factor. According to the results, it is recommended to use concrete ponds for the breeding of young A. stellatus. Key words: growth, A. stellatus, food, brackish water, concrete ponds.
Ashouri, A., hossinnia, E., saiadfar, J., yousefi, A., Hosseinpour, A., yegane, H., & hallajian, A. (2022). Optimum growth of farmed stellate sturgeon fish (Acipenser stellatus) in concrete ponds using brackish water. Sturgeon Extention Journal, 5(8), 39-45.
MLA
Alireza Ashouri; esmaeil hossinnia; javad saiadfar; ayoub yousefi; Ali Hosseinpour; hooshang yegane; Ali hallajian. "Optimum growth of farmed stellate sturgeon fish (Acipenser stellatus) in concrete ponds using brackish water". Sturgeon Extention Journal, 5, 8, 2022, 39-45.
HARVARD
Ashouri, A., hossinnia, E., saiadfar, J., yousefi, A., Hosseinpour, A., yegane, H., hallajian, A. (2022). 'Optimum growth of farmed stellate sturgeon fish (Acipenser stellatus) in concrete ponds using brackish water', Sturgeon Extention Journal, 5(8), pp. 39-45.
VANCOUVER
Ashouri, A., hossinnia, E., saiadfar, J., yousefi, A., Hosseinpour, A., yegane, H., hallajian, A. Optimum growth of farmed stellate sturgeon fish (Acipenser stellatus) in concrete ponds using brackish water. Sturgeon Extention Journal, 2022; 5(8): 39-45.
