Limitations of carrageenan microbound diets for feeding white sturgeon, Acipenser transmontanus , larvae
Identifieur interne : 000F53 ( Istex/Corpus ); précédent : 000F52; suivant : 000F54Limitations of carrageenan microbound diets for feeding white sturgeon, Acipenser transmontanus , larvae
Auteurs : Anna Gawlicka ; Line Mclaughlin ; Silas S. O. Hung ; Joël De La NoüeSource :
- Aquaculture [ 0044-8486 ] ; 1996.
Abstract
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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DOI: 10.1016/0044-8486(95)01220-6
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<front><div type="abstract" xml:lang="en">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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<abstract xml:lang="en"><p>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.</p>
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<ce:abstract-sec><ce:simple-para>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 (<ce:italic>P</ce:italic>
< 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.</ce:simple-para>
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<originInfo><publisher>ELSEVIER</publisher>
<dateIssued encoding="w3cdtf">1996</dateIssued>
<copyrightDate encoding="w3cdtf">1996</copyrightDate>
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<language><languageTerm type="code" authority="iso639-2b">eng</languageTerm>
<languageTerm type="code" authority="rfc3066">en</languageTerm>
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<abstract lang="en">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.</abstract>
<subject><genre>article-category</genre>
<topic>Nutrition</topic>
</subject>
<subject><genre>Keywords</genre>
<topic>Sturgeon</topic>
<topic>Larvae</topic>
<topic>Carrageenan</topic>
<topic>Microbound diets</topic>
<topic>GIT</topic>
<topic>Histology</topic>
<topic>Histochemistry</topic>
<topic>Starvation</topic>
</subject>
<relatedItem type="host"><titleInfo><title>Aquaculture</title>
</titleInfo>
<titleInfo type="abbreviated"><title>AQUA</title>
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<genre type="journal">journal</genre>
<originInfo><dateIssued encoding="w3cdtf">19960531</dateIssued>
</originInfo>
<identifier type="ISSN">0044-8486</identifier>
<identifier type="PII">S0044-8486(00)X0003-8</identifier>
<part><date>19960531</date>
<detail type="volume"><number>141</number>
<caption>vol.</caption>
</detail>
<detail type="issue"><number>3–4</number>
<caption>no.</caption>
</detail>
<extent unit="issue pages"><start>145</start>
<end>280</end>
</extent>
<extent unit="pages"><start>245</start>
<end>265</end>
</extent>
</part>
</relatedItem>
<identifier type="istex">E2FCF7162990016A0CD9B56CBC44D774A0FDE1CF</identifier>
<identifier type="DOI">10.1016/0044-8486(95)01220-6</identifier>
<identifier type="PII">0044-8486(95)01220-6</identifier>
<recordInfo><recordContentSource>ELSEVIER</recordContentSource>
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