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Aquaculture, poultry, companion and wildlife

Growth performance and product quality of meagre (Argyrosomus regius) fed diets of different protein/lipid levels at industrial scale

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Pages 685-694 | Received 31 Oct 2016, Accepted 01 Feb 2017, Published online: 30 Mar 2017

Figures & data

Table 1. Formulation, g/kg and proximate composition, g/100 g of the diets used for meagre in trials 1 and 2.

Table 2. Fatty acid composition, g/100g total fatty acids, of the two experimental diets used in trial 2.

Table 3. Growth and feed utilisation indexes of meagre fed the four experimental diets in trial 1.

Figure 1. Growth curves of meagre feeding on the four experimental diets in trial 1 during the whole experimental period.

Figure 1. Growth curves of meagre feeding on the four experimental diets in trial 1 during the whole experimental period.

Table 4. Total body and fillet composition and liver glycogen and fat (g/100g) of trial 1 meagre dietary groups.

Figure 2. Liver histology of fish fed diets containing: (A) 43% protein and 15% lipid, (B) 43% protein and 20% lipid, (C) 47% protein and 15% lipid and (D) 47% protein and 20% lipid. In fish from groups fed with 20% lipid, hepatocyte lipid deposition was observed that was slightly improved as protein levels increased in the diets. Bars 100 μm, 20×.

Figure 2. Liver histology of fish fed diets containing: (A) 43% protein and 15% lipid, (B) 43% protein and 20% lipid, (C) 47% protein and 15% lipid and (D) 47% protein and 20% lipid. In fish from groups fed with 20% lipid, hepatocyte lipid deposition was observed that was slightly improved as protein levels increased in the diets. Bars 100 μm, 20×.

Table 5. Growth, feed utilisation and somatometric quality indexes of meagre that received the two experimental diets in trial 2.

Table 6. Fillet proximate composition, g/100g, of trial 2 meagre dietary groups.

Table 7. Fillet fatty acid composition, g/100g total fatty acids, of trial 2 meagre dietary groups.