Broodstocking of farmed beluga, (Huso huso) using brakish water from the Caspian Sea in concrate ponds

Document Type : Tarvij

Authors

International Sturgeon Research Institute, Agricultural Research Education and Extension Organization

Abstract

over a two-year period, 325 females of H. huso with a mean weight of 18.3 kg after tagging were stocked in 8 round concrete ponds and flow rate 2.5 – 3 liter per second of steady inlet water. The mean number of fish per each tank was 40 fish that reached a 27.6 kg during 2 years. Concentrated feed formulated with accurate knowledge of lake water intake and feed intake in terms of fish biomass and water temperature, 0.5% - 1% body weight per day in the morning and evening meal. The total feed consumed during the two years of cultivation was 5624 kg and the type of feed used was domestically concentrated feed containing 40% protein, 12% fat and 17% carbohydrate. The main objective of this project was to produce H. huso using the Caspian Sea brackish water at the Chaboksar Sturgeon Research Station.the results of rearing H.huso showed that their production rate was 188.66 kg, mean feed conversion ratio (FCR) was 2.25, mean fish weight gain index (WG) was 26.8, average fish specific growth index (SGR) was 0.064 and daily fish growth was 0.050. The results of rearing beluga in 8 concrete ponds in the second year showed that their production rate was 139.76 kg, average feed conversion ratio (FCR) was 2.13, average fish weight gain (WG) was 20.48, the mean fish growth index (SGR) was 0.051 percentages per day and the daily growth of fish was0.039 gr. The results of sex determination showed that 72% of the studied fish were higher than at stage II, 1.9% at stage I - II, 9.6% at stage II, 5% at stage II – III, 1.3% at stage III, 10.2% at stage III - IV of sexual maturity.

Keywords

Files

Share

How to cite

Statistics