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Santahar region of Bogra district, North-west shed was constructed and the space allocated for
part of Bangladesh. This hatchery consisted of
three main components i) bio-filter, ii) rearing
tank unit (chari) and iii) air blower/air pump
unit Plastic drum of 200 -250 1 capacity and
cemented chari of 200-250 1 capacity were used
as bio-filter and larval rearing containers
respectively. A 0.5 hp air blower with 6
aquarium air pump were used to operate the
aeration system in the hatchery. Diluted sea
water (10-12 ppt) made from brine solution
(200-250 ppt) collected from salt-bed was used
in the backyard hatchery system of hatching of
eggs and rearing of larvae. Rearing of first stage
zoea-larvae was reared in three rearing tanks
following the stocking densities of 40, 50 and
60/1 of water respectively. Production of post-
larvae were 20±0.82, 22±1.12 and 28± 1.63/liter
of water in treatments I, II and III respectively in
38, 40 and 39 days rearing period.
589 PRAMANIK, M.W.A.; RAZZAK, M.A.;
HUSSAIN, M.G. & MAZID, M.A. (Freshwater
Sub-Station, Bangladesh Fisheries Research
Institute, Shantahar, Bogra). Effects of black
Bengal goat manure on growth and production of
Genetically Improved Farmed Tilapia (GIFT)
starin, Oreochromis niloticus. Bang. J. Fish. Res.,
2005, 9(1), 45-46.
In a goat-tilapia integrated farming system, the
effect of Black Bengal goat manure on the growth
and production of Oreochromis niloticus was
studied at the Freshwater Sub-station, Shantahar,
Bogra for 4.5 months. The stocking density used in
three treatments were, 200 goats and 15,000 GIFT
strain/ha (T 1); 300 goats and 15,000 GIFT strain/ha
(T 2); and only 15,000 GIFT strain/ha (T 3). The
initial individual total length and weight of stocked
tilapia were 7.6 cm and 11.34 g, respectively.
2
Twelve ponds each having an area of 40 m were
used for this trail. On one side of each pond goat
211
each goat was 0.75 m × 1.5 m. Newly weaned
black Bengal goats of average weight 8.45 kg was
used in the trial. Every morning the goats manure
was swiped out in ponds through the fixed opening
of bamboo made floor of goat shed. Water depth of
the ponds was maintained at 0.75 m. The highest
fish production was in treatment 1 (1,750 kg/ha)
followed by treatment 2 (1,455 kg/ha) and
treatment 3 (621 kg/ha). The difference in
individual goat weight was not significant (P>0.05)
among treatments 1 and 2.
590 PRODHAN, S.; KAMRUJJAMAN, M.
and NABI, M.R. (Dept. of Zoology,
Jahangirnagar University, Savar, Dhaka). Summer
population diversity of benthos in relation to some
physico-chemical parameters of soil in an
intensive fish culture pond within the
Jahangirnagar University campus. Bang. J. Life.
Sci., 2008, 20(2), 35-43.
Study on the benthic population and some aspects
of physico-chemical properties of bottom soil of a
semi-intensive fish culture pond within
Jahangirnagar University campus was done from
April to June of 2006. During the study period, a
total of 8 benthic genera belonging to three major
groups i.e., four of Annelida, three of Insecta and
one of Mollusca were identified and their mean
average distribution was 4196±545.18; 6355 ±
3
2479.76 and 3472 ± 1227.54 individuals/in
respectively. Different physico-chemical properties
of soil i.e., surface water and bottom soil
temperature were found to vary from 32,3±l.66 and
30.43±l.89"C respectively and soil moisture, soil
pH, organic carbon, organic matter and nitrogen
were determined as 51.9±9.6%; 6.3±0.26,
0.96±0.13%; 1.65±0.226% and 0.147±0.017
respectively. The observations of the present study
indicate that the experimental pond was in a
favourable condition for fish culture.