Lipid content and fatty acid profile of Senegalese sole (Solea senegalensis Kaup, 1858) juveniles as affected by feed containing different amounts of plant protein sources

• Published in: Food chemistry Vol. 134; no. 3; pp. 1337 - 1342
• Main Authors: Fernandes, T.J.R., Alves, R.C., Souza, T., Silva, J.M.G., Castro-Cunha, M., Valente, L.M.P., Oliveira, M.B.P.P.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2012; Elsevier
• Subjects: Animal Feed; Animal, plant, fungal and microbial proteins, edible seaweeds and food yeasts; Animals; Animals, Newborn; ARA; Biological and medical sciences; Body Weight; DHA; EPA; FA profile; Fatty Acids - analysis; Feed and pet food industries; Flatfishes - growth & development; Flatfishes - metabolism; Food industries; Fundamental and applied biological sciences. Psychology; Lipid content; Lipids - analysis; Muscles - metabolism; Plant Proteins - metabolism; Plant-protein experimental diets; Senegalese sole; Solea senegalensis; ARA; Plant-protein experimental diets; Senegalese sole; EPA; DHA; FA profile; Lipid content; Lipids; Fatty acids; Profile; Diet; Plant protein; Feed
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2012.03.026

► Senegalese sole juveniles were fed with increasing levels of plant protein sources. ► An increase of lipids in liver, but not in muscle, was observed. ► An increasing level of C18:2 n–6 was observed in muscle. ► ARA and DHA levels in muscle remained similar among treatments. A growth trial with Senegalese Sole (Solea senegalensis Kaup, 1858) juveniles fed with diets containing increasing replacement levels of fishmeal by mixtures of plant protein sources was conducted over 12weeks. Total fat contents of muscle, liver, viscera, skin, fins and head tissues were determined, as well as fatty acid profiles of muscle and liver (GC-FID analysis). Liver was the preferential local for fat deposition (5.5–10.8% of fat) followed by fins (3.4–6.7% fat). Increasing levels of plant protein in the diets seems to be related to increased levels of total lipids in the liver. Sole muscle is lean (2.4–4.0% fat), with total lipids being similar among treatments. Liver fatty acid profile varied significantly among treatments. Plant protein diets induced increased levels of C16:1 and C18:2 n−6 and a decrease in ARA and EPA levels. Muscle fatty acid profile also evidenced increasing levels of C18:2 n−6, while ARA and DHA remained similar among treatments. Substitution of fishmeal by plant protein is hence possible without major differences on the lipid content and fatty acid profile of the main edible portion of the fish – the muscle.