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Hydrolyzed tuna meat by-product supplement for juvenile red sea bream, Pagrus major, and its effect on growth, enzyme activity, plasma parameters, and apparent nutrient digestibility

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Date
2014
Author
Mamauag, Roger Edward ORCID
Ragaza, Janice Alano
Koshio, Shunsuke
Ishikawa, Manabu
Yokoyama, Saichiro
Page views
2,271
Subject
fish products ASFA
hydrolysis ASFA
digestibility ASFA
Plasma blood parameters
Taxonomic term
Pagrus major GBIF
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Abstract
A growth experiment was conducted on juvenile red sea bream, Pagrus major to investigate the effect of the inclusion in fish diets, of tuna meat by-product hydrolysate which was processed through enzymatic hydrolysis using a commercially available enzyme, derived from Bacillus subtilis. Six experimental diets were formulated in the experiment. Three diets contained 50, 150 and 250 g/kg of TPM-H (tuna meat by-product hydrolysate), and two diets with the unprocessed TPM (tuna meat by-product) at an inclusion level of 50 and 250 g/kg. A control diet was formulated without any addition of the test ingredients. Treatment diets were fed ad libitum to juvenile fish with an initial average body weight of 0.81 ±0.13 g for 56 days. Results of the feeding trial suggest that the inclusion of TPM-H at 250 g/kg in fish diets improved body weight gain rate (3271.58%), feed intake (24.55 g/fish/56 days) and feed conversion efficiency (1.12) of the fish. Apparent nutrient digestibility of hydrolyzed tuna meat by-product improved compared to the unhydrolyzed ingredient. These results suggest that TPM processed as hydrolysates can be efficiently utilized by fish.
URI
http://hdl.handle.net/10862/2248
Suggested Citation
Mamauag, R. E., Ragaza, J. A., Koshio, S., Ishikawa, M., & Yokoyama, S. (2014). Hydrolyzed tuna meat by-product supplement for juvenile red sea bream, Pagrus major, and its effect on growth, enzyme activity, plasma parameters, and apparent nutrient digestibility. The Israeli Journal of Aquaculture-Bamidgeh, IJA_66.2014.1021, 9 pages. http://hdl.handle.net/10862/2248
Type
Article
ISSN
0792-156X
Collections
  • Journal Articles [1160]


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