| Summary: | The objective of this study is to evaluate the possibility of Spirulina meal (SP) to
replace fish meal in the diet of Asian seabass, Lates calcarifer. Five isoproteic (45%
crude protein) and isolipid (12% crude lipid) diets were formulated to replace FM
with 0 (control), 5, 10, 20 and 30% Spirulina (as SP0, SP5, SP10, SP20 and SP30
respectively) and fed to fish (initial body weight, 6.00±0.02g) for eight weeks.
Triplicate group of 20 tails juvenile Asian seabass were stocked in recirculating
aquaculture system. At the end of feeding trial, there was no Significance
difference (p>0.05) in term of weight gain, specific growth rate, feed intake,
protein efficiency ratio, feed conversion ratio, viscerosomatic index and condition
factor. Fish fed SP0 showed significantly higher (p<0.05) survival compared to
SP20 and SP30 but no significance difference from fish fed SP5 and SPI0. The
weight gain of juvenile Asian seabass ranged from 109.03% to 198.35% whereby
SP10 showed the highest compared to SP0 and SP30 was the lowest. The highest
feed intake was from fish fed SP10 and was statistically proven (p<0.05). There
was significance difference in hepatosomatic index (HSI) whereby HSI increased
with higher inclusion level of SP ranged from 0.81 to 1.51. Whole body-proximate
composition were significantly affected by the inclusion of SP in diet of Asian
seabass. The present study indicate replacement level 5-10% inclusion are
recommend for a long term use.
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