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the lower fish growth as recorded from the ponds agriculture as well as infrastructural changes on
of T 4 might be due to euglenophytes bloom.
Thick bloom inhibited light penetration which
hampered photosynthesis and growth of other
phytoplankton that are the preferred food of
planktivorous fishes. Mortality of fishes in ponds
having euglenophytes bloom was possibly due to
formation of anoxic situation in the early morning
or due to the combined effect of anoxic situation
and toxic metabolites secretion by the
euglenophytes.
569 KHAN, S.A.K.U.; HAIDER, M.M.
(Agrotechnology Discipline, Khulna University,
Khulna); ISLAM, A.K.M.K. & AHMED, M.
(Architecture Discipline, Khulna University,
Khulna). Impact of Infrastructural Development
and Shrimp Culture on Traditional Agro-Based
Rural House Pattern in the Southwestern Regions
of Bangladesh. South Asian J. Agric., 2006, 1(2),
64-71.
From the early days to the present time, human
settlements in Bangladesh experienced several
changes and transformations by the influence of
agricultural patterns basically found in the rural
areas of the country. The rural house is considered
as a unit of production in which the hut, the
courtyard and wider paddy fields tied closely. The
traditional rural Bengali landscape can be typified
as a pond in the east, a bamboo plantation in the
west, a banana orchard in the north and open south.
But recent incorporation of roads, bridges, health
complexes, rural electrification etc. as well as
deviation of agriculture, such as shrimp culture,
poultry farming, dairy business, flower production,
nursery business etc. have brought changes in
house forms and landscape pattern in rural
Bangladesh The study was conducted in the
southwestern region of Bangladesh involving two
categories of farmers (crop farmers and shrimp
farmers) to find out the impact of deviated
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agro-based rural household pattern and homestead
landscape. This changed pattern and its magnitude
are yet unexplored to the researchers and in this
article an effort has been taken to explore those.
570 KOHINOOR, A.H.M.; ISLAM, M.S.;
ZAHER, M. & HUSSAIN, M.G. (Freshwater
Station, Bangladesh Fisheries Research Institute,
Mymensingh). Seed production and culture
techniques of climbing perch, Anabas testudineus.
Bang. J. Fish. Res., 2005, 9(1), 41-42.
Six treatments each with 12 replications designed
to optimize the dose of inducing agent PG to
achieve fertilization and hatching success of
climbing perch, Anabas testudineus were tested.
The females were given single injection of 7-12
mg PG/kg body weight and the males were given 4
mg PG/kg body weight. Fertilization and hatching
rate varied from 67±4.55% to 66±3.0% and
59±4.88% to 57±6.21% for the doses of 10, 11 and
12 mg PG/kg of body weight, respectively. The
hormone dose had significant (P<0.05) effect on
fertilization and hatching. Six mini shallow
cisterns (570 cm × 105 cm) were used to
investigate the efficacy of zooplankton and
Artemia nauplii as feed for spawn rearing. Three-
day old spawns were stocked in six mini shallow
cisterns at a stocking density of 100 individuals/L
of water. Two treatments each with three
replications were used to develop culture technique
of the climbing perch. In case of treatment-1, the
spawns were fed with Artemia nauplii three times
daily, while in treatment-2, zooplankton were used
as feed in the same manner as in treatment-1. After
14 days of rearing, mean final weight of the fry of
treatments-1 and 2 were 95.55±6.71 and
57.69±5.40 mg, respectively. In treatment-1,
spawn fed with Artemia nauplii showed
significantly (P<0.05) higher mean weight than the
spawn fed with zooplankton (treatment 2).