The experiment was conducted to determine optimal dietary inclusion level of red algae
Eucheuma denticulatum in diet of red sea bream
Pagrus major. Four isonitrogenous and isolipidic soy protein concentrate (SPC) diets and one fishmeal (FM) diet (D1) were prepared with red algae supplementation levels of 0% (D2), 3% (D3), 6% (D4), and 9% (D5). Triplicate groups of fifteen juveniles (3.90±0.05 g, mean±SEM) were stocked in 100-
l polypropylene tanks and fed twice a day to apparent satiation level for 56 days. The study demonstrated that fish fed D3 grew faster than those fed diets 2, 4, and 5, although growth was not significantly different from fish fed D1. Muscle total amino acid and whole body proximate composition of fish were not altered by dietary treatments. Red algae supplementation improved hemoglobin (Hb), glutamyl oxaloacetic transaminase (GOT), and lowered reactive oxygen molecules (
d-ROMs).
E. denticulatum can be efficiently absorbed and utilized by red sea bream, and optimal dietary supplementation level is at 3% of diet.
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