|
Effects of fish oil replacement by a combination of soybean and palm oilin Asian seabass (Lates calcarifer) diet on growth, fatty acid profile,digestive enzyme activity, immune parameters and salinity challenge |
|---|---|
| รหัสดีโอไอ | |
| Creator | 1. Md. Arefin Rahman 2. Chutima Tantikitti 3. Naraid Suanyuk 4. Ian Forster 5. Bullika Hlongahlee 6. Watcharit Tunpairoj |
| Title | Effects of fish oil replacement by a combination of soybean and palm oilin Asian seabass (Lates calcarifer) diet on growth, fatty acid profile,digestive enzyme activity, immune parameters and salinity challenge |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2022 |
| Journal Title | Songklanakarin Journal of Science an Technology (SJST) |
| Journal Vol. | 44 |
| Journal No. | 1 |
| Page no. | 79-90 |
| Keyword | alternative lipid source, Asian seabass, growth, fatty acid profile, salinity challenge |
| URL Website | https://rdo.psu.ac.th/sjst/index.php |
| ISSN | 0125-3395 |
| Abstract | The experiment was in completely randomized design. Seven iso-nitrogenous and iso-lipidic diets were formulatedhaving soybean and palm oil, an equal combination, to replace fish oil (FO) in diets at 0%, 25%, 37.5%, 50%, 62.5%, 75%, and100%, respectively. Each diet was fed twice daily to Asian seabass juvenile (3.00ยฑ0.26g) in quintuplicate for eight weeks andperformances were investigated. Finally, the fish were challenged with 30 ppt salinity to observe osmoregulatory responses. Zeromortality was observed in all feeding groups. Fish growth responses, diet consumption and feed conversion ratio weresignificantly affected (p<0.05). Crude lipid and viscerosomatic index of final fish were influenced (p<0.05). Fatty acid profiles ofthe whole-body reflected the dietary intake. Arachidonic acid (20:4n-6), eicosapentaenoic acid (20:5n-3), docosahexaenoic acid(22:6n-3) and n-3/n-6 ratio were better in fish fed 37.5% FO replaced diet. Specific digestive enzyme activities in stomach,pyloric caeca and intestine were unaffected (pห0.05). White blood cells, respiratory burst activity and serum protein wereinfluenced by the diets (p<0.05). For salinity challenge, similar osmoregulatory responses were observed among the dietarygroups. In short, the combination of soybean and palm oil substituted 75% FO in Asian seabass juvenile diet without affectinggrowth performance and health status. |
