Growth and yield of tilapia hybrid (red tilapia) in aquaponics system
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Date
2021-12-01
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DMMMSU
Abstract
An aquaponics system was studied through the
integrated culture of tilapia hybrid (Red Tilapia) and
lettuce var. Estrosa in a recirculating system for 100
days. Red Tilapia with an Average Body Weight
(ABW) of 36.99g were stocked in two treatments, 80
fish/m3 (Treatment I) and 100 fish/m3 (Treatment II),
to assess the fish growth, survival, yield and production
of lettuce. Specific Growth Rate (SGR) in Treatment I
was 1.03 and Treatment II, 1.14. Feed Conversion
Ratio (FCR) varies from 1.83 to 1.90, associated with
stocking density. Treatment II incurred the highest
survival rate of 92.85% while Treatment I has 90.19%.
Biomass production of red tilapia was significantly
higher in Treatment I with 1,761.00 g than in Treatment
II with 1,341.00 g (p = 0.012). Highest yield of lettuce
was obtained during the second cropping with 250.00g
for Treatment I and 202.00g for Treatment II, but no
significant difference was observed between the two
treatments. Correlation analysis showed no significant
relationship between red tilapia weights and water
quality parameters such as ammonia, nitrite, nitrate,
temperature, pH, Total Dissolved Solids, and DO.
However, a significant positive relationship was
revealed between the biomass of lettuce and nitrite
during the first cropping in Treatment II. This study
demonstrated the stocking density of 80 fish/m3 had
better effect on the growth, FCR, and biomass
production of red tilapia under an aquaponics system.