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571 KOHINOOR, A.H.M.; SULTANA, S. & 10.31%, 13.96% and 14.38% in case of T 1, T 2 and
HUSSAIN, M.G. (Freshwater Station, Bangladesh T 3, respectively.
Fisheries Research Institute, Mymensingh).
Culture potentials of bata, Labeo bata under semi- 572 KOHINOOR, A.H.M.; UDDIN, M.S. &
intensive management system. Bang. J. Fish. Res., HUSSAIN, M.G. (Freshwater Station, Bangladesh
2005, 9(1), 25-26. Fisheries Research Institute, Mymensingh). On
farm trial of Bangladesh Fisheries Research
Small indigenous fish species (SIS) provide food, Institute (BFRI) evolved two aquaculture
nutrition, subsistence and supplemental income to technologies. Bang. J. Fish. Res., 2005, 9(1), 27-
a great majority of the people particularly the poor 28.
and disadvantaged people of Bangladesh. To date
nobody explored the possibilities of culturing these Two BFRI evolved aquaculture technologies -
species in combination with the indigenous major integrated rice fish farming and carp polyculture
carps viz. catla, Catla catla; rohu, Labeo rohita, with over-wintered fingerlings under different
and mrigal Cirrhinus cirrhosus and grass carp, slocking densities were tested during 2003-04. The
Ctenopharyngodon idellus. An experiment on the study was coordinated with two local NGOs
polyculture of carps with a popular SIS, bata namley NICHAITA and JNDP, Muktagacha,
(Labeo bata) was carried out to evaluate the Mymensingh. Integrated rice fish farming
production performance of carp-SIS culture in on- technology was demonstrated in 9 plots each
farm condition during 15 March to 15 September having an area between 60-100 dec. during boro
2003. Three treatments each having three season Fifteen days after transportation of rice
replications with different stocking densities of seedlings fingerlings of rajpuna (Bareodes
bata were tested keeping the carp species gonionotus) of 7-10 g of individual weight were
combination and stocking density similar in all the stocked in the rice fields at the density of 3,000
treatments viz. treatment 1 (T 1), bata (5,000/ha) + (T 1), 3,750 (T 2) and 4,500/ha (T 3). The
catla, rohu and mrigal (5,000/ha at the ratio of corresponding final weight of fish after three and
1:1:1) + grass carp (250/ha); treatment 2 (T 2), bata half months in treatments 1, 2 and 3 were
(7,500/ha) + catla, rohu and mrigal (5,000/ha at the 110±14.21, 101 ± 16.55 and 86±22.28 g,
ratio of 1:1:1) + grass carp (250/ha); and treatment respectively. The mean weight of fish in treatments
3 (T 3), bata (10,000/ha) + catla, rohu and mrigal 1 and 2 was significantly higher than treatment 3.
(5,000/ha at the ratio of 1:1:1) + grass carp Fish production obtained from treatments 1, 2 and
(250/ha). After six months rearing, the production 3 were 218.16±18.29, 239.70 ± 25.11 and
obtained were 2,466±77, 2,395±85 and 2,074 ±72 236±24.66 kg/ha, respectively. On-farm
kg/ha from T 1, T 2 and T 3, respectively. The highest demonstrations of carp polyculture using over-
production was obtained from T 1, where the wintered fingerlings rohu (25-28 g), catla (24-26
stocking density of bata was the minimum g), mrigal (21-26 g) and grass carp (20-24 g) under
(5,000/ha) while the lowest production was different stocking densities were undertaken in
2
obtained from T 1, where the stocking density of nine earthen ponds (1,200-1,600 m ) for a period
bata was maximum (10,000/ha). Significant of six months at three different stocking densities.
difference (P<0.05) exists in the production levels The stocking densities of treatment 1 (T 1),
as obtained from different treatments. The treatment 2 (T 2) and treatment 3 (T 3) were 2,000,
contribution of bata to total production was 3.000 and 4,000/ha, respectively. Fish were fed
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