Partial replacement of fish oil by soybean oil on lipid distribution and liver histology in European sea bass (Dicentrarchus labrax) and rainbow trout (Oncorhynchus mykiss) juveniles

By A. C. Figueiredo-Silva, E. Rocha, Jorge Dias, Paula Silva, P. Rema, E. Gomes, L. Valente. 2005

188 citations recorded by the source corpus.

Summary A 12-week feeding trial was conducted to evaluate the effects of fish oil replacement by soybean oil, on lipid distribution and liver histology of two commercially important finfish species: rainbow trout (Oncorhynchus mykiss) and European sea bass (Dicentrarchus labrax). Sea bass (16.2 ± 0.5 g; mean ± SD) and rainbow trout (52.1 ± 0.5 g) juveniles were fed one of three isonitrogenous (500 g kg−1 CP) and isoenergetic (19 kJ g−1) diets, containing 0% (control, diet A), 25% (diet B) and 50% (diet C) soybean oil. At the end of the experiment, lipid deposition was evaluated in muscle, liver and viscera. Cholesterol and triglycerides levels were also determined in plasma. Tissue total, neutral and polar lipid composition (g kg−1 total lipids) showed no significant differences within species, regardless the dietary treatment. The same trend was observed for plasma parameters (P > 0.05). Viscera were the preferential tissue of lipid deposition, with 252–276 and 469–513 g kg−1 total lipid content in trout and sea bass, respectively. Dietary fish oil replacement had no effect on either hepatic lipid droplets accumulation or degree and pattern of vacuolization in the observed liver sections. These data suggest that both sea bass and trout can be fed diets containing up to 50% soybean oil without adverse effects on tissue lipid composition or liver histology.

Subfields: Aquatic Science, Immunology, Physiology

View Paper: https://www.semanticscholar.org/paper/110baa82d7bca973a8a1a3bb712eb413e5719099

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In Aquatic Science

1. G. Turchini
2. Wing Ng
3. B. Torstensen
4. D. Tocher
5. N. Romano
6. B. Glencross
7. M. Metian

In Immunology

1. G. Turchini
2. Wing Ng
3. B. Torstensen
4. D. Tocher
5. N. Romano
6. B. Glencross

In Physiology

1. G. Turchini
2. Wing Ng
3. B. Torstensen
4. D. Tocher
5. B. Glencross

Citations in the corpus

• Fish oil replacement in finfish nutrition (2009, background): “Similarly, no significant detrimental effects of complete or partial FO replacement in European sea bass diets have been reported in other short-term feeding experiments (Figueiredo-Silva et al. 2005; Martins et al. 2006).”
• Biochemical and histological hepatic changes of Nile tilapia Oreochromis niloticus exposed to carbaryl (2007, methodology): “In addition to the qualitative analysis, evaluation of the hepatocellular cytoplasm vacuolization degree was made using a semi-quantitative approach, according to the following five grades and general criteria [33]: Grade 0 (none)—absence of hepatocellular vacuolization; Grade 1 (low)—on average, <2”