DIETARY PHOSPHORUS REQUIREMENT OF CRAYFISH, ASTACUS LEPTODACTYLUS

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ZAHMATKESH A.; POURREZA JAVAD; ABEDIAN A.A.H.; SHARIATMADARI F.; VALIPOUR ALI REZA; KARIMZADEH K.

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Journal: JOURNAL OF MARINE SCIENCES AND TECHNOLOGY Year:2005 | Volume:3 | Issue:4 Page(s): 25-36

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Title

DIETARY PHOSPHORUS REQUIREMENT OF CRAYFISH, ASTACUS LEPTODACTYLUS

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Keywords

DIETQ3

PHOSPHORUSQ2

FRESHWATER CRAYFISH (ASTACUS LEPTODACTYLUS)Q2

Abstract

DIETary PHOSPHORUS requirement of narrow-clawed crayfish, Astacus leptodactylus, was determined using five pelleted DIETs containing equal levels of energy, protein and lipid. Five experimental DIETs were prepared using a basal DIET containing casein, gelatin, dextrin, starch, fish oil, soya oil, vitamin mixture, and mineral mixture tree of PHOSPHORUS. Various concentrations of PHOSPHORUS (containing of 0, 0.5, 1, 1.5, 2 percentages) provided through adding sodium monodihydrogen phosphate in the basal DIET. Crayfish with initial mean weight of 8.16±1.91g was fed experimental DIETs for 80 days. The DIET with 0% PHOSPHORUS supplementation yielded the lowest weight gain (1.06g) and the highest weight gain of 2.34g and 2.52g were achieved in the DIETs containing 1.5% and 2% PHOSPHORUS, respectively. There was significant difference between the DIETary levels of PHOSPHORUS and weight gain (p<0.05). Moreover, the DIETs with low PHOSPHORUS supplementation levels (0-1%) showed the poorer survival rate. Although the lowest survival rate was observed at the 1% PHOSPHORUS level and the highest at 1.5% and 2% PHOSPHORUS levels, no significant difference (p>0.05) between survival rates in the trial DIETs was found.Optimal PHOSPHORUS requirement in the DIET of narrow-clawed crayfish was estimated with broken line regression analysis to be about 1.3%. From these findings, it may be concluded that a DIETary PHOSPHORUS supplement is necessary for narrow-clawed crayfish. So, it is recommended to use the DIETary hosphorus concentration of 1%-1.5% in applied DIETs formulation.

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APA: Copy

ZAHMATKESH, A., POURREZA, JAVAD, ABEDIAN, A.A.H., SHARIATMADARI, F., VALIPOUR, ALI REZA, & KARIMZADEH, K.. (2005). DIETARY PHOSPHORUS REQUIREMENT OF CRAYFISH, ASTACUS LEPTODACTYLUS. JOURNAL OF MARINE SCIENCES AND TECHNOLOGY, 3(4), 25-36. SID. https://sid.ir/paper/74583/en

Vancouver: Copy

ZAHMATKESH A., POURREZA JAVAD, ABEDIAN A.A.H., SHARIATMADARI F., VALIPOUR ALI REZA, KARIMZADEH K.. DIETARY PHOSPHORUS REQUIREMENT OF CRAYFISH, ASTACUS LEPTODACTYLUS. JOURNAL OF MARINE SCIENCES AND TECHNOLOGY[Internet]. 2005;3(4):25-36. Available from: https://sid.ir/paper/74583/en

IEEE: Copy

A. ZAHMATKESH, JAVAD POURREZA, A.A.H. ABEDIAN, F. SHARIATMADARI, ALI REZA VALIPOUR, and K. KARIMZADEH, “DIETARY PHOSPHORUS REQUIREMENT OF CRAYFISH, ASTACUS LEPTODACTYLUS,” JOURNAL OF MARINE SCIENCES AND TECHNOLOGY, vol. 3, no. 4, pp. 25–36, 2005, [Online]. Available: https://sid.ir/paper/74583/en

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