Limitations of carrageenan microbound diets for feeding white sturgeon, Acipenser transmontanus, larvae
Identifieur interne : 001B04 ( Main/Merge ); précédent : 001B03; suivant : 001B05Limitations of carrageenan microbound diets for feeding white sturgeon, Acipenser transmontanus, larvae
Auteurs : A. Gawlicka [Canada] ; L. Mclaughlin [Canada] ; S. S. O. Hung [États-Unis] ; J. D. L. Noue [Canada]Source :
- Aquaculture [ 0044-8486 ] ; 1996.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Histologie.
English descriptors
- KwdEn :
Abstract
Copyright (c) 1996 Elsevier Science B.V. All rights reserved. Utilization of carrageenan microbound (CMB) diets by white sturgeon larvae was evaluated using biochemical, histological and histochemical methods. Compared with a control group fed Biodiet, a commercial salmonid diet, larvae fed the CMB diets for 16 days had a significantly (P<0.05) higher moisture content but lower growth, survival, and whole body amino acid and lipid contents. Although growth and survival of CMB-fed larvae were significantly higher than those of starved larvae, histological signs such as degenerated cells in liver and intestine are indicative of starvation-like conditions. Feeding CMB diets also induced a decrease in activity of alkaline phosphatase, aminopeptidase M, and nonspecific esterase in the brush border of intestinal cells. Even though the CMB diets present three desirable characteristics for sturgeon larvae such as appropriate size, soft texture and availability on the bottom of tanks, they are not recommended because they have three major drawbacks. First, CMB diets have to be kept fresh, and distributed in solution for a bottom feeder like sturgeon. Second, sturgeon larvae have trouble locating and ingesting the CMB diets. Finally, assimilation of nutrients from CMB diets is possibly restricted by limited ability of sturgeon larvae to break down and digest the carrageenan matrix.
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Pascal:96-0302696Le document en format XML
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<term>Carrageenan</term>
<term>Enzymatic activity</term>
<term>Fasting</term>
<term>Feed</term>
<term>Fry</term>
<term>Gastrointestinal</term>
<term>Histology</term>
<term>Metabolism</term>
<term>Microencapsulation</term>
<term>Survival</term>
<term>Weight gain</term>
<term>Young animal</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Aliment pour animal</term>
<term>Microencapsulation</term>
<term>Carraghénane</term>
<term>Alevin</term>
<term>Animal jeune</term>
<term>Métabolisme</term>
<term>Gastrointestinal</term>
<term>Histologie</term>
<term>Activité enzymatique</term>
<term>Aminoacide</term>
<term>Prise poids</term>
<term>Survie</term>
<term>Jeûne alimentaire</term>
<term>Acipenser transmontanus</term>
<term>Acipenseridae</term>
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<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Histologie</term>
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<front><div type="abstract" xml:lang="en">Copyright (c) 1996 Elsevier Science B.V. All rights reserved. Utilization of carrageenan microbound (CMB) diets by white sturgeon larvae was evaluated using biochemical, histological and histochemical methods. Compared with a control group fed Biodiet, a commercial salmonid diet, larvae fed the CMB diets for 16 days had a significantly (P<0.05) higher moisture content but lower growth, survival, and whole body amino acid and lipid contents. Although growth and survival of CMB-fed larvae were significantly higher than those of starved larvae, histological signs such as degenerated cells in liver and intestine are indicative of starvation-like conditions. Feeding CMB diets also induced a decrease in activity of alkaline phosphatase, aminopeptidase M, and nonspecific esterase in the brush border of intestinal cells. Even though the CMB diets present three desirable characteristics for sturgeon larvae such as appropriate size, soft texture and availability on the bottom of tanks, they are not recommended because they have three major drawbacks. First, CMB diets have to be kept fresh, and distributed in solution for a bottom feeder like sturgeon. Second, sturgeon larvae have trouble locating and ingesting the CMB diets. Finally, assimilation of nutrients from CMB diets is possibly restricted by limited ability of sturgeon larvae to break down and digest the carrageenan matrix.</div>
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