Replacement of Fishmeal By 60% with Soybean Meal or Peanut Meal in Diets for Juvenile Mangrove Red Snapper (Lutjanus argentimaculatus) (Forsskål, 1775)- Juniper Publishers

Juniper Publishers- Open access journal of Oceanography and Fisheries



A feeding trial was undertaken to develop a low fishmeal practical diet for mangrove red snapper (Lutjanus argentimaculatus) by replacing 60% fishmeal (FM) protein with either soybean meal (SM) or peanut meal (PM) and 10% fish solubles (FS) or krill solubles (KS) supplementation. Seven isonitrogenous (crude protein: 40% dry matter) and isolipidic (crude lipid: 9% dry matter) diets were prepared [Diet 1 / FM100, Diet 2 / (FM40+SM), Diet 3 / (FM40+SM+FS), Diet 4 / (FM40+SM+ KS), Diet 5 / (FM40+PM), Diet 6 / (FM40+PM+FS), Diet 7 / (FM40+PM+ KS)]. Triplicate groups of fish (initial body weigh: 1.46±0.02 g, mean ± S.D.) were stocked in 150-l circular fiberglass tanks at a density of 18 fish per tank. Fish were hand fed the respective experiment diets to satiation twice a day for 56 days. Results showed that there were no significant (p>0.05) differences in values of final body weight (FBW) or weight gain (WG) among the fish fed with the FM100 diet and those fed with (FM40+SM), (FM40+SM+FS) and (FM40+SM+ KS) diets. For fish fed with the (FM40+PM) diet, WG were significantly lower when compared to fish fed with the other experiment diets. Supplementation of 10% FS or KS improved growth parameters of fish fed with PM-containing diets. Feed efficiency (FE), protein efficiency ratio (PER) and protein productive value (PPV) showed similar tendencies as growth indices. No significant differences in feed intake (FI) values were observed among different dietary treatments. Morphological indices, as well as whole-body compositions showed marked variations among different groups. Plasma parameters were not significantly affected by dietary treatments. The present study indicates that 60% of fishmeal protein could be replaced by soybean meal or by a mixture of peanut meal and 10% FS or KS without affecting the growth performance of Lutjanus argentimaculatus.

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