| ALA | linolenic acid (18:3n-3) |
| ARA | arachidonic acid (20:4n-6) |
| ddPCR | droplet digital polymerase chain reaction |
| DHA | docosahexaenoic acid (22:6n-3) |
| EPA | eicosapentaenoic acid (20:5n-3) |
| fads2 | fatty acyl desaturase 2 (gene in fish) |
| FADS | fatty acyl desaturase (enzyme in mammals) |
| Fads | fatty acyl desaturase (enzyme in fish) |
| FM | fish meal |
| FO | fish oil |
| GSB | gilthead seabream |
| HD | high fads2 expression |
| LA | linoleic acid (18:2n-6) |
| LC-PUFA | long chain polyunsaturated fatty acid |
| LD | low fads2 expression |
| PBCs | peripheral blood cells |
| TFA | total fatty acids |