Table 1.

Composition of fresh viscera before being processed into fish silage, enzymatic hydrolysates and optimized enzymatic hydrolysates.

	Dry matter (%)	Protein (%)	Ash (%)
Fish silage	76.6 ± 2.3	6.6 ± 0.2	0.2 ± 0.03
Enzymatic hydrolysates	59.5 ± 0.3	6.4 ± 0.1	0.4 ± 0.04
Optimization of enzymatic hydrolysates	56.2 ± 4.3	5.5 ± 0.2	0.6 ± 0.03