studies, FM can be replaced by up to 30% SFM in sea bream juvenile diets (Nogales Merida et al., 2010), 33% in Atlantic salmon (Gill et al., 2006) and 22% in rainbow trout (Onchorynchus mykiss) (Martínez, 1984) without any adverse effects on growth performance of fish. Although SFM has high fibre and lignin content (and a low level of
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