Comparison of effects of dietary‐specific fatty acids on growth and lipid metabolism in Nile tilapia
| Autor: | Mei-Ling Zhang, Jian-Gang Jiao, Fang Qiao, Jia-Jing Wen, Liqiao Chen, Zhen-Yu Du, Yan Liu, Li-Jun Ning |
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| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
Adipose tissue Lipid metabolism 04 agricultural and veterinary sciences Aquatic Science Biology Fish oil biology.organism_classification Safflower oil Palmitic acid 03 medical and health sciences chemistry.chemical_compound Nile tilapia chemistry 040102 fisheries 0401 agriculture forestry and fisheries Lipid deposition Food science Liver damage 030304 developmental biology |
| Zdroj: | Aquaculture Nutrition. 25:862-872 |
| ISSN: | 1365-2095 1353-5773 |
| DOI: | 10.1111/anu.12906 |
| Popis: | The dominant fatty acids (FAs) in oils are often used to explain different nutritional effects of dietary oils in fish. However, the amounts of dominant FAs among oils are different, and the nutritional roles of these important FAs in fish have not been precisely compared at similar levels in feeding trials. In the present study, different amounts of palmitic acid were added to safflower oil (SO), olive oil (OO) and fish oil (FO) to obtain comparable amounts (about 550 g/kg of total FAs) of 18:2n‐6, 18:1n‐9 and 20:5n‐3 + 22:6n‐3 and subsequently fed to Nile tilapia (11.1 ± 0.01 g) for 8 weeks. The results showed similar growth among groups but FO group obtained lower fat deposition, serum ALT and AST activities, compared to OO. Lipogenesis‐related gene expressions were higher in OO group than FO group in liver, muscle and adipose tissue, but there were only few differences in these genes between SO and FO groups. Lipid catabolism genes in FO group were higher than OO and SO groups in adipose tissue, but not in muscle, and the significantly higher expressions of CPT1b and PPARα were only observed in liver. Overall, dietary 18:2n‐6, 20:5n‐3 and 22:6n‐3 were beneficial to normal growth and lipid metabolism, whereas high amount of 18:1n‐9 induced lipid deposition and liver damage in Nile tilapia. |
| Databáze: | OpenAIRE |
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