Dietary protein hydrolysate and trypsin inhibitor effects on digestive capacities and performances during early-stages of spotted wolffish: Suggested mechanisms

Type Article
Date 2011-04
Language English
Author(s) Savoie A.2, Le Francois N. R.1, 2, Lamarre S. G.2, 3, Blier P. U.2, Beaulieu L.2, 4, Cahu Chantal5
Affiliation(s) 1 : Biodome Montreal, Montreal, PQ H1V 1B3, Canada.
2 : Univ Quebec, Dept Biol, Rimouski, PQ G5L 3A1, Canada.
3 : Mem Univ Newfoundland, St John, NF A1C 5S7, Canada.
4 : Univ Laval, Inst Nutraceut & Funct Food INAF, Quebec City, PQ G1V 0A6, Canada.
5 : IFREMER, Nutr Aquaculture & Genom Res Unit, F-29280 Plouzane, France.
Source Comparative Biochemistry And Physiology A-molecular & Integrative Physiology (1095-6433) (Elsevier Science Inc), 2011-04 , Vol. 158 , N. 4 , P. 525-530
DOI 10.1016/j.cbpa.2010.12.017
WOS© Times Cited 13
Keyword(s) Spotted wolffish, Anarhichas minor, Early-stages, Trypsin inhibitor, Protein hydrolysate, Digestive capacity, SBTI
Abstract Growth rate is dependent upon adequate provision of amino acids especially in newly-hatched fish which experience very high growth rate. The replacement of a fraction of protein content by partially hydrolyzed (pre-digested) proteins was carried out and the digestive capacities and performances of larval/juvenile spotted wolffish (Anarhichas minor) were measured. The goal of this study was to verify whether the scope for growth is principally dictated by the proteolytic capacity of the digestive system by examining the effect of protein hydrolysates (PH) and trypsin inhibitor dietary inclusion on protein digestion/assimilation capacities, growth and survival. Four experimental diets were examined: C (control) I (supplemented with 750mg/kg soybean trypsin inhibitor (SBTI)) H (supplemented with 20% PH) and HI (supplemented with 20% PH and 750mg/kg SBTI). Protein hydrolysate supplementation gave significantly higher body mass than control at day 15 post-hatching. Unexpectedly, at day 30 and 60, fish administered diet HI (containing trypsin inhibitor) were heavier than the other groups. Suggested mechanisms are presented and discussed. The main conclusions of this study are that wolffish larval stage lasts roughly 15days and that juvenile growth is linked to proteolytic capacity, but also very likely to absorption capacity of peptides and amino acids. (C) 2011 Elsevier Inc. All rights reserved.
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Savoie A., Le Francois N. R., Lamarre S. G., Blier P. U., Beaulieu L., Cahu Chantal (2011). Dietary protein hydrolysate and trypsin inhibitor effects on digestive capacities and performances during early-stages of spotted wolffish: Suggested mechanisms. Comparative Biochemistry And Physiology A-molecular & Integrative Physiology, 158(4), 525-530. Publisher's official version : https://doi.org/10.1016/j.cbpa.2010.12.017 , Open Access version : https://archimer.ifremer.fr/doc/00033/14399/