EFFECTS OF DIFFERENT REARING STOCKING DENSITY ON HUSO HUSO FINGERLINGS IN BRACKISH WATER AND FRESH WATER DURING THE ACCLIMATION TO THE FORMULATED DIET

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POURALI FOSHTOMI H.R.; BAHMANI M.; SADEGHIRAD M.; HOSSEINNIA E.; ASHOURI A.; YAZDANI SADATI M.A.

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Journal: JOURNAL OF BIOLOGY SCIENCE Year:2011 | Volume:5 | Issue:2 (SERIES NO. 17) Page(s): 17-32

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Title

EFFECTS OF DIFFERENT REARING STOCKING DENSITY ON HUSO HUSO FINGERLINGS IN BRACKISH WATER AND FRESH WATER DURING THE ACCLIMATION TO THE FORMULATED DIET

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Keywords

HUSO HUSOQ2

GROWTH PERFORMANCEQ2

NUTRITION INDICESQ3

DENSITYQ2

CONCENTRATEQ2

WEANINGQ2

Abstract

The study was carried out to evaluate the effects of varying stocking densities on the GROWTH PERFORMANCE and NUTRITION INDICES on HUSO HUSO fingerlings during the acclimation to the formulated diet. This study was conducted in two phases. In the first phase of study, 252 HUSO HUSO with the mean weight of 3.3±1.9 g (Mean±SD) were stocked in two different conditions (fresh water and brackish water) at three different stocking densities. The stocking densities were 150 (n=42), 250 (n=78) and 450 (n=132) g/m2 in the first phase. In the second phase of experiment, 522 HUSO HUSO (5.9±1.1 g) (Mean±SD) were reared at 500 (n=84), 1000 (n=168) and 1500 (n=270) g/m2 stocking densities. The adaptation period to the formulated diet was 20 days. Results showed that the highest growth was recorded in H. huso stocked at 1000 g m-2 in brackish water which was significantly higher (P<0.5) than that recorded in freshwater suggesting the advantage of rearing H. huso in brackish water at improved DENSITY of 1000 g m-2. Results obtained from total length in juvenile H. huso conform to these results. Low specific growth rate (SGR) was reported with a stocking DENSITY of 1500 g m-2 in freshwater which was not significantly different from that in brackish water. Hence rearing juvenile H. huso in brackish water at high densities (1500 g m-2) is preferred to rearing in freshwater as H. huso is more capable of adapting to stressful conditions of stocking DENSITY in brackish water. Similar trends were observed for percentage body weight increase (BWI%) showing the advantage of using a stocking DENSITY of 1000 g m-2 in brackish water. According to the results of this study, HUSO HUSO with a mean weight of 3-5 g can feed on dry formulated diet completely during a period of 20 days.

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APA: Copy

POURALI FOSHTOMI, H.R., BAHMANI, M., SADEGHIRAD, M., HOSSEINNIA, E., ASHOURI, A., & YAZDANI SADATI, M.A.. (2011). EFFECTS OF DIFFERENT REARING STOCKING DENSITY ON HUSO HUSO FINGERLINGS IN BRACKISH WATER AND FRESH WATER DURING THE ACCLIMATION TO THE FORMULATED DIET. JOURNAL OF BIOLOGY SCIENCE, 5(2 (SERIES NO. 17)), 17-32. SID. https://sid.ir/paper/164174/en

Vancouver: Copy

POURALI FOSHTOMI H.R., BAHMANI M., SADEGHIRAD M., HOSSEINNIA E., ASHOURI A., YAZDANI SADATI M.A.. EFFECTS OF DIFFERENT REARING STOCKING DENSITY ON HUSO HUSO FINGERLINGS IN BRACKISH WATER AND FRESH WATER DURING THE ACCLIMATION TO THE FORMULATED DIET. JOURNAL OF BIOLOGY SCIENCE[Internet]. 2011;5(2 (SERIES NO. 17)):17-32. Available from: https://sid.ir/paper/164174/en

IEEE: Copy

H.R. POURALI FOSHTOMI, M. BAHMANI, M. SADEGHIRAD, E. HOSSEINNIA, A. ASHOURI, and M.A. YAZDANI SADATI, “EFFECTS OF DIFFERENT REARING STOCKING DENSITY ON HUSO HUSO FINGERLINGS IN BRACKISH WATER AND FRESH WATER DURING THE ACCLIMATION TO THE FORMULATED DIET,” JOURNAL OF BIOLOGY SCIENCE, vol. 5, no. 2 (SERIES NO. 17), pp. 17–32, 2011, [Online]. Available: https://sid.ir/paper/164174/en

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