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2004 to see the growth of over wintered M.
544 HOSSAIN, M.A. (Dept. of Aquaculture, rosenbergii juveniles in polyculture with
Bangladesh Agricultural University, Mymensingh). indigenous major carps (catla and rohu) in ponds
Development of low cost feed using local using formulated diets. Three isoenergetic
ingredients for culture of freshwater prawn, experimental diets formulated using fish meal,
Macrobrachium rosenbergii in ponds. Bang. J. meat and bone meal, mustard oil cake, rice bran,
Fish. Res., 2005, 9(1), 21-23. wheat bran and molasses, and a shrimp feed Golda
special feed' from Saudi-Bangla Fish Feed Ltd.
Two experiments were conducted to formulate and were assigned to treatments 1, 2, 3 and 4 (control),
evaluate test diets using locally available respectively, each treatment had two replications.
2
ingredients to find out suitable diets for mono and Eight experimental ponds each measuring 80 m in
polyculture of Macrobrachium rosenbergii in the Field Laboratory Complex of the Faculty of
ponds. The first experiment was conducted from 1 Fisheries, BAU campus, Mymensingh were used.
July 2003 to 29 September 2003 in 12 The mean initial weights of M. rosenbergii, catla
2
experimental ponds each measuring 30 m behind and rohu were 1.60±0.01, 30.0+0.09 and 25.0±0.08
the Fisheries Faculty Building, BAU campus, g, respectively. A total of 160 fish and prawn
Mymensingh. Three experimental diets containing (20,000/ha) were stocked in each pond at the ratio
30% protein were formulated using fish meal, meat of 2:1:1 (prawn: catla: rohu). Fish were fed at the
and bone meal, mustard oilcake, sesame meal and rate of 3-5% of their body weight. Prawns fed diet
rice bran and assigned to treatments 1, 2 and 3, 1, 2 and 4 showed higher weight gains compared to
respectively. A special shrimp feed (Starter-II) diet 3. The weight gain of catla was significantly
from Saudi-Bangla Fish Feed Ltd. was assigned to higher in T, while in case of rohu was higher in T 1,
treatment 4 (Control). Each treatment had three and T 4, respectively. There were no significant
replications. Juveniles of M. rosenbergii differences (P>0.05) in the survival rate of fish as
2
(2.90±0.81g) were stocked at the rate of 4/m . obtained from different treatments. The overall
Prawns were fed three times daily at the rate of total fish production ranged from 2196 to 2679
15% of their body weight at the beginning, which kg/ha/5 months. The highest production and the
was gradually reduced to 10% and 5% for the last highest profit (Tk. 56,53l/ha/5 months) was
two months. There was no significant (P>0.05) obtained from T 1, and the lowest (Tk. 24,932/ha/5
difference between the weight gains of prawns fed months) from T 4.
diets 1 and 4 (control), but they were significantly
(P<0.05) higher than those of diets 2 and 3. The 545 HOSSAIN, M.A.R.; CHOWDHURY, N.S.
FCR values of diets ranged between 2.61 to 3.36 & ALI, M.Z. (Dept. of Fisheries Biology &
with diets 1 and 4 showing significantly (P<0.05) Genetics, Bangladesh Agricultural University,
lower FCR values. The survival rate of prawns Mymensingh). Marketing of small indigenous
ranged between 68 to 78% with prawns fed diets 1 species of fish (SIS) in three selected fish markets
and 4 showing significantly higher survival rate. of Mymensingh. Bang. J. Fish. Res., 2005, 9(1),
The production of prawn ranged from 921 to 1,428 91-93.
kg/ha/90 days and diet 1 gave the highest
production. Treatment 1 gave the highest net profit A socio-economic survey was conducted round the
of Tk. 161,980/ha/90 days. The second experiment year in three fish markets at Mymensingh,
was conducted from December, 2003 to April, Bangladesh. The selected markets were
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