Effects of Dietary Protein-to-Energy Ratios on Growth, Immune Response, Antioxidative Capacity, Liver and Intestinal Histology, and Growth-Related Gene Expression in Hybrid Yellow Catfish (Pelteobagrus fulvidraco × Pelteobagrus vachelli )

Figure 3

Histomorphology of the foregut (a), midgut (b), and Hindgut (c) of hybrid yellow catfish showing the histological structure in various dietary P/E ratio groups. The P/E ratio groups showed gradual enhancement of the intestinal villi. P/E ratios mg/kcal A P/E84, B P/E88, C P/E90, D P/E93, E P/E95, F P/E96, G P/E99, and H P/E103. hV: villus height; wV: villus width; hE: enterocyte height; M: muscular layer thickness; S: serosa thickness. Scale bar: 100 μm.

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