Partial fishmeal replacement with Spirulina (Arthrospira platensis) meal improved growth performance and health indices in Asian seabass (Lates calcarifer) juveniles under high-salinity conditions

Authors

1 Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran

2 Aquaculture Research Centre-South of Iran, Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research Education and Extension Organization (AREEO), Ahvaz, Iran

3 Aquatic Animal Health and Diseases Department, School of Veterinary Medicine, Shiraz University, Shiraz, Iran

4 Member of Excellence Center of Warm Water Fish Health, Shahid Chamran University of Ahvaz, Ahvaz, Iran

Abstract

The effect of fishmeal (FM) replacement with Spirulina (Arthrospira platensis) meal (SPM) was investigated in Asian seabass (Lates calcarifer) diet. Dietary FM was replaced with SPM at 5 (SP5%) and 10% (SP10%) and a diet without SPM served as the control group. One hundred and thirty five L. calcarifer juveniles (45.0 ± 0.2 g) were randomly distributed into nine 300-L circular polyethylene tanks (15 fish/tank). SP10% group had the highest final weight that was associated with better feed conversion ratio value. A higher gut amylase activity was observed in SPM-treated groups than the control group. SP5% group had a higher gut trypsin activity than other treatments. The liver superoxide dismutase activity in SP5% was higher than the other groups. The liver reduced glutathione level increased with increasing SPM level in the diets. The plasma lysozyme activity in SP10% group was higher than other groups. The plasma cholesterol and alkaline phosphatase contents decreased in the fish fed with SP5%. The plasma aspartate aminotransferase decreased in the fish fed with SPM-supplemented diets. Based on the above-mentioned findings, dietary FM replacement with SPM at 10% is recommended for growth and improving health status in L. calcarifer juveniles.

Keywords

Iranian Journal of Fisheries Sciences
Volume 24, Issue 2
March 2025
Pages 405-421

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