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Thursday, November 21, 2024
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മലയാളം
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Grow-out Farming systems
Most suited farming system for lobsters is the indoor grow-out system as it is more
convenient for management. The indoor grow-out system consist of a series of circular
and square or rectangular cement tanks and has several advantage, as the different
units will be easily accessible for feeding cleaning and maintenance. The farming
system can either be flow through model or a semi-closed recirculation system incorporating
biological filters. If flow through systems is used, continuous monitoring of water
quality has to be carried out.
Water quality management
The optimal environmental requirements for lobster farming are temperature (26-33oC),
salinity (25-35 ppt), pH (6.8-8.5) and dissolved oxygen (>3.5 ppm). In recirculation
system, ammonia (<0.1 ppm) and nitrate (<0.1 ppm) levels have to be closely
followed.
Farm management
For lobster farming and fattening, stocking is a continuous process. Different sizes
have to be separated and after conditioning, can be stocked in separate tanks. The
optimum stocking density in indoor grow-out system would be 10-15 lobsters/m2
for farming and 5 numbers/m2 for fattening. Shelters have to be provided
for faster growth. Molluscan meat is the most preferred diet of lobsters. However,
this could be supplemented with trash fish and squid head. Lobsters prefer moist
feeds with good water stability
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