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Proteolysis by juvenile sea bass (Dicentrarchus labrax) gastrointestinal enzymes as a method for the evaluation of feed proteins
Year:
1994
Source of publication :
Fish Physiology and Biochemistry
Authors :
Eshel, Ariel
;
.
Harpaz, Sheenan
;
.
Lindner, Pinhas
;
.
Volume :
14
Co-Authors:
Lindner, P., Department of Food Sciences, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet-Dagan, 50250, Israel
Eshell, A., Department of Food Sciences, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet-Dagan, 50250, Israel
Kolkovski, S., National Center for Mariculture, Israel Oceanographic and Limnological Research, P.O. Box 1212, Eilat, 88112, Israel
Tandler, A., National Center for Mariculture, Israel Oceanographic and Limnological Research, P.O. Box 1212, Eilat, 88112, Israel
Harpaz, S., Department of Aquaculture, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet-Dagan, 50250, Israel
Facilitators :
From page:
399
To page:
407
(
Total pages:
9
)
Abstract:
Protein digestibility by gastrointestinal homogenates of Dicentrarchus labrax, was investigated in 5 feeds in relation to their amino acids composition and their ability to sustain growth of D. labrax post larval juveniles. Gastric proteolysis was found to contribute <25% of the total proteolytic capacity. Correlation was found between intestinal proteolytic capacity and the feed protein content of three pairs of amino acids. The sum of basic amino acids, arginine + lysine in the feed protein exhibited a positive correlation with susceptibility to proteolysis. The sum of the acid amino acids glycine and proline showed a negative correlation. Comparison of the intestinal proteolytic enzymatic activities in 3 growth stages of this species revealed similar profiles. Post larval and large juveniles had similar proteolytic capacities when compared on the basis of equal activity on an artificial substrate of Trypsin. Specific growth rates of post larval fish fed on these 5 feeds correlated positively with their protein digestibility as measured with large juvenile's intestinal homogenates. The results suggest that in this species, the efficiency of feeds in sustaining growth at the post larval stage can be estimated by measuring the feed protein digestibility by the proteolytic system of larger sized juveniles. © 1995 Kugler Publications.
Note:
Related Files :
Dicentrarchus labrax
Feeds
growth rate
post larvae
proteolytic enzymes
Show More
Related Content
More details
DOI :
10.1007/BF00003377
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
19412
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:28
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Scientific Publication
Proteolysis by juvenile sea bass (Dicentrarchus labrax) gastrointestinal enzymes as a method for the evaluation of feed proteins
14
Lindner, P., Department of Food Sciences, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet-Dagan, 50250, Israel
Eshell, A., Department of Food Sciences, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet-Dagan, 50250, Israel
Kolkovski, S., National Center for Mariculture, Israel Oceanographic and Limnological Research, P.O. Box 1212, Eilat, 88112, Israel
Tandler, A., National Center for Mariculture, Israel Oceanographic and Limnological Research, P.O. Box 1212, Eilat, 88112, Israel
Harpaz, S., Department of Aquaculture, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet-Dagan, 50250, Israel
Proteolysis by juvenile sea bass (Dicentrarchus labrax) gastrointestinal enzymes as a method for the evaluation of feed proteins
Protein digestibility by gastrointestinal homogenates of Dicentrarchus labrax, was investigated in 5 feeds in relation to their amino acids composition and their ability to sustain growth of D. labrax post larval juveniles. Gastric proteolysis was found to contribute <25% of the total proteolytic capacity. Correlation was found between intestinal proteolytic capacity and the feed protein content of three pairs of amino acids. The sum of basic amino acids, arginine + lysine in the feed protein exhibited a positive correlation with susceptibility to proteolysis. The sum of the acid amino acids glycine and proline showed a negative correlation. Comparison of the intestinal proteolytic enzymatic activities in 3 growth stages of this species revealed similar profiles. Post larval and large juveniles had similar proteolytic capacities when compared on the basis of equal activity on an artificial substrate of Trypsin. Specific growth rates of post larval fish fed on these 5 feeds correlated positively with their protein digestibility as measured with large juvenile's intestinal homogenates. The results suggest that in this species, the efficiency of feeds in sustaining growth at the post larval stage can be estimated by measuring the feed protein digestibility by the proteolytic system of larger sized juveniles. © 1995 Kugler Publications.
Scientific Publication
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