Open Access

Table 3

Growth and survival of giant gourami after 6 weeks of feeding with four levels of fresh Azolla in replacement of commercial pellets. Data are means ± SD per treatment. For each parameter, different letters indicate significant differences between treatments.

Parameters A 100% Azolla B 57% Azolla C 26% Azolla D 0% Azolla p-values
Initial body weight (BWi, g) 37.5 ± 7.0 36.2 ± 6.7 36.2 ± 5.5 36.8 ± 4.8 NS1
Final body weight
(BWf, g)
36.8 ± 6.8a 54.5 ± 9.6b 61.2 ± 10.3c 68.4 ± 10.0d <0.001
Weight gain (g d–1) –0.02 ± 0.01a 0.43 ± 0.04b 0.6 ± 0.05c 0.75 ± 0.06d <0.001
Weight gain (%) –1.8 ± 1.4a 50.3 ± 5.3b 69.1 ± 6.2c 86.3 ± 8.8d <0.001
Biomass gain (g) –77 ± 31.7a 638 ± 129.2b 958 ± 14.1c 1174 ± 97.5d <0.001
SGR2 (% d–1) –0.04 ± 0.03a 0.97 ± 0.09b 1.25 ± 0.09c 1.48 ± 0.12d <0.001
FCR3 2.3 ± 0.69 2.7 ± 0.12 3.1 ± 0;21 NS
Distributed pellets (g) 1433 ± 55a 2555 ± 128b 3663 ± 42c <0.001
KFulton 1.46 ± 0.16a 1.56 ± 0.07b 1.64 ± 0.09c 1.69 ± 0.09d < 0.001
Survival (%) 96.7 ± 2.9 95.8 ± 2.9 98.3 ± 2.9 96.7 ± 3.8 NS1

1 NS = not significant. 2SGR = specific growth rate. 3 FCR = feed conversion ratio calculated for commercial pellets.

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