"Performance, Digestibility Efficiencies, Gut and Liver Morphologies of" by Roger Edward P. Mamauag, Janice A. Ragaza et al.
 

Performance, Digestibility Efficiencies, Gut and Liver Morphologies of Snub Nose Pompano Trachinotus Blochii Fed Spray-Dried Haemoglobin Meal as Protein Substitute for Fishmeal

Document Type

Article

Publication Date

7-12-2021

Abstract

Spray-dried haemoglobin meal; a by-product and derivative of the swine processing industry; is formed when haemoglobin is separated hygienically from pig's blood. A 120-days feeding trial using snub nose pompano Trachinotus blochii (1.01+/- 0.02 g) tested spray-dried haemoglobin meal (SHM) as an ingredient in six iso-nitrogenous (crude protein of 50%) and iso-lipidic (crude fat of 8%) diets; namely; a diet with 0% SHM (control) and five diets replacing fishmeal with SHM at 4; 8; 12; 16 and 20%. Weight gain percentage (WG%) significantly decreased (p < 0.05) when fish were fed diets with 12; 16 and 20% SHM inclusion levels. Feed conversion ratio and survival significantly decreased (p < 0.05) when fish were fed diets with 16 and 20% SHM inclusion levels. However; visceral somatic index; hepatosomatic index; condition factor and proximate composition were not affected (p > 0.05) by SHM inclusion levels. Asan ingredient for pompano feed; SHM has digestibilities for protein; lipid and dry matter at 89; 78 and 45% respectively. No apparent pathological changes were observed in the intestines. However; physiological changes in the liver have been seen in fish-fed diets containing 12; 16 and 20% of SHM. Based on the quadratic regression model at the maximum response of weight gain percentage; the optimum inclusion level of SHM was estimated to be 3.08% (5.87% SHM protein in the diet).

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