Effects of different inclusion of sirulina meal on growth, survival and feed utilization of juvenile Asian seabass (Lates calcarifer) reared in freshwater

• Main Author: Tan, Chin Yong
• Format: Academic Exercise
• Language: English
• Published: 2015
• Subjects: SH Aquaculture. Fisheries. Angling
• Online Access: https://eprints.ums.edu.my/id/eprint/18538/1/Effects%20of%20different%20inclusio.pdf; https://eprints.ums.edu.my/id/eprint/18538/

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.