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Effects of Supplementary Feeds on Growth and Survival of Freshwater Giant Prawn (macrobrachium Rosenbergii)

S.U. Ahmed
Brackishwater Station, BFRI, Khulna 9280, Bangladesh

M. Rahman
Bangladesh Fisheries Research Institute, Riverine Station,Chandpur 3602, Bangladesh

S. Rahman
Bangladesh Fisheries Research Institute, Riverine Station,Chandpur 3602, Bangladesh

Abstract/ Executive Summary:

Highest growth of prawn was obtained with Feed B (743 kg/ha) with highest survival rate (60.88%) followed by Feed A where production and survival rate was 659 kg/ha and 53.50%, respectively. Feed A contained 30% dry ground cow viscera, 40% oil cake, 20% rice-bran and 10% wheat bran. Feed conversion ratios were found to be 7.60:1 for Feed A and 6.46:1 for Feed B, which indicated that Feed B was more efficiently utilized by the prawn than Feed A. Statistical analysis revealed that the differences in production of prawns among the treatments were highly significant (P< 0.01).

Keywords: Macrobrachium resenbergii, Feed, Survival

Location: Bangladesh Fisheries Research Institute

Start Date: 00-08-1995

End Date: 00-02-1996

Program Area: Animal Health and Management

Commodity: Prawn

Objectives:

To find out the effects of different feeding treatments on the growth, survival and production of M. rosenbergii pond culture system.

Methodology:

Nine earthen ponds each of 0.16 ha were selected for this study and marked as P-1, P-2, P-3. All the ponds were dried-up to eradicate insects, poisonous gases and undesirable fishes. Lime (CaC0₃) was applied at the rate of 200kg/ha and then fertilized with both organic and inorganic fertilizers. Each pond was divided into three equal compartments (area of each compartment was 0.053 ha) by bamboo fencing. Physico-chemical factors of pond water viz. water depth, temperature, transparency and pH were determined at fortnightly intervals, and free carbondioxide, dissolved oxygen and water hardness were recorded at bimonthly intervals. Juveniles of M. rosenbergii which are available from local rivers (Dakatia and Meghna) were collected and then kept for nine days in cement cisterns, filled with pond water for acclimatization. They were finally stocked on August '95 at the rate of 5000 juveniles /ha (800 juveniles in each compartment) in all the ponds. Initial mean weight of the juveniles were 4.85g in P-1, 4.20g in P-2 and 4.00g in P-3. All the ponds were fertilized monthly with cow dung at the rate of 750 kg/ha (40 kg in each compartment), and urea at the rate of 40 kg/ha (2.1 kg in each compartment). After two months, compost fertilizer of cow dung, water hyacinth and lime at the ratio of 10:20:1 were used instead of cow-dung. Ponds of P-1 were considered as controlled (without any supplementary feed). Feed was supplied at the rate of 5% of the body weight of prawn every day in the evening in the ponds of P-2 and P-3. Feed-A was used in P-2 and Feed-Bin P-3. Sampling of prawn was conducted once in a month the final harvest was done after 180 days of culture on February '96 by dewatering the ponds.

Source of Information: Bangladesh J. Fish. Res., 3(2): 151-155, 1999

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In prawn mono culture system, sub optimal environmental conditions and management procedures are the main limiting factors. Although the feed type B gave the best result but the maximum yield was only 743 kg/ha/yr. Whereas in Hawaii 1360 kg of prawns/acre/year are produced by adopting the intensive culture system. However the production level of 743 kg /ha/yr in this experiment is quite satisfactory compared to our national production level of 75-100 kg/ha/yr.

Knowledge Management: Journal