Effect of dietary protein level and source on digestive proteolytic enzyme activity in juvenile Senegalese sole, Solea senegalensis Kaup 1850

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DOIResolve DOI: http://doi.org/10.1007/s10499-012-9508-6
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TypeArticle
Journal titleAquaculture International
ISSN0967-6120
Volume20
Issue6
Pages10531070; # of pages: 18
Subjectdiet; enzyme activity; flatfish; food supplementation; growth response; hydrolysis; inhibitor; juvenile; physiology; protein; soybean; Animalia; Glycine max; Pisum sativum; Solea senegalensis; Soleidae; Triticum aestivum
AbstractThe effect of dietary protein level and protein source on growth and proteolytic activity of juvenile Solea senegalensis was studied. In Experiment 1, fish were fed on four experimental diets containing increased protein levels (36, 46, 56 and 67%). In Experiment 2, Senegalese soles were fed on five diets with partial substitution of fish meal by soybean meal, soybean protein concentrate, soybean protein isolate, wheat gluten meal or pea protein concentrate. Results prove that growth and proteolytic activity in the distal intestine of fish were affected by the quantitative increase in dietary protein. The origin of protein source used in the elaboration of experimental diets affected both the amount and composition of the alkaline proteases secreted into the intestinal lumen; however, it did not decrease animal growth. Juvenile Senegalese sole showed capability to modulate digestive protease secretion when the concentration and/or source of dietary protein were modified. Quantity and quality of dietary protein affected protein hydrolysis in Senegalese sole intestine. This study establishes that 30% fish meal protein can be replaced by soybean derivatives without affecting intestinal proteases. Replacement with wheat gluten meal or pea protein concentrate should be taken cautiously, but further research is needed to establish whether growth performance and digestive enzyme physiology of Senegalese sole are affected by plant protein-supplemented diets in a long-term trial. © 2012 Springer Science+Business Media B.V.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Marine Biosciences (IMB-IBM)
Peer reviewedYes
NPARC number21269550
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Record identifier440eb3ce-3fdb-4363-9b73-1e297a181b0a
Record created2013-12-12
Record modified2016-05-09
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