Page 32 - 240 introduction to fisheries and aquaculture tecnologies-azam

Introduction to Fisheries and Aquaculture Technologies

c. Soil texture should be loamy.
d. Soil pH should be near 6.5.
e. Soil should be free from iron compound and acidic
substances.
Gher preparation a. Cleaning of weeds.
b. Eradication of predatory/weed fishes.
c. Drying of gher.
d. Removal of black soil, ifany.
e. Removal of gasious and waste water.
f. Installation of fine-meshed net at the opening of water
entrance.
g. Liming @ 1-5kg depending on pH ranging from 6.6 to
5.0.
h. Fertilization: Cowdung @ 4kg/dec
Urea @ 50g/dec
TSP @ 100g/dec
Stocking 15000-20000PLlha
Feeding a. SABINCO shrimp feed Starter-I @ 10% body weight
for 7 days.
b. After 7 days mixture of fish meal, mustard oilcake,
wheat flour, rice bran and snail mussel at a ratio of
40:25:18:13:4 as supplementary feed should be applied
@ 2-3% body weight.
Fertilization Urea @ 50g/dec and TSP @IOOg/dec at every week
depending on the color of water.
Management a. 20% water should be changed at every fullmoon and
new moon tide.
b. Water quality should be checked regularly.
c. Aquatic weeds should be removed regularly.
d. Shrimp health condition should be monitored regularly.
Production Yield 600-800kg/ha/year.
05. Risk involvement and a. Inadequate supply of shrimp fry.
management in adopting the b. Theft.
technology c. Natural disaster such as flood, cyclone etc.
06. Impact of environment No adverse effect of improved culture of penaeid
shrimp on the aquatic environment has been recorded
so far.
07. Procedure of technology The technology can be transferred through relevant
transfer public extension agencies and NGO's. Training and
demonstrations are important tools for the purpose.
08. Expected outcome a. Shrimp production and farmer's income will be
increased.
b. It will create employment opportunity.
09. Recommendations a. Training should be conducted by extension agencies
and NGO's to improve technical knowledge of the
farmers.
b. BFRI and DoF need to maintain a strong liaison to
disseminate this technology.
c. Ban the collection of mother shrimp from the sea
during the breeding season.
d. Should take step to install penaeid shrimp hatchery
both in government and private sector.

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