A 42-d feeding trial was carried out to assess the potential use of the
seaweed Enteromorpha intestinalis (“gutweed”) as a food source for
monosex Nile tilapia (Oreochromis niloticus) fry and to determine
a maximum threshold fishmeal substitution rate. Six fish diets randomly
assigned to tilapia juvenile and in triplicate were compared:
replacing 0%, 10%, 20%, 30%, 40%, and 50% of fishmeal protein
with a gutweed protein blend. Highest growth and cost reduction in
tilapia fry production was observed in fish fed a 20% replacement
diet.