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dc.contributor.authorChiu, Yvonne N.
dc.contributor.authorBenitez, Lita V.
dc.date.accessioned2012-08-23T13:39:55Z
dc.date.available2012-08-23T13:39:55Z
dc.date.issued1981
dc.identifier.citationChiu, Y.N., & Benitez, L.V. (1981). Studies on the carbohydrates in the digestive tract of the milkfish Chanos chanos. Marine Biology, 61(2):247-254.en
dc.identifier.issn0025-3162
dc.identifier.urihttp://hdl.handle.net/10862/1039
dc.descriptionSEAFDEC Contribution no. 71.en
dc.description.abstractCrude extracts from various regions of the digestive tract of pond grown milkfish were tested forttheir ability to catalyze the hydrolysis of various carbohydrates. The most active carbohydrases were those involved in the hydrolysis of agr-glucosidic bonds. Maltose, trehalose, dextrin, starch and glycogen were rapidly hydrolyzed in the presence of crude extracts from the intestines and the pyloric caeca. High amylase activity was observed in extracts from the intestines, pancreas, pyloric caeca and liver. The intestinal amylase had optimum activity at pH 6.2 and at a temperature of about 50°C. It was active at a chloride concentration of 10 to 40 ppt. The amylase activity in the intestines consistently peaked daily at about noon when the milkfish gut was full. In contrast, enzyme activity was significantly lower at 0030 hrs when the gut was empty. These results are consistent with earlier observations that the milkfish is a daytime feeder and suggest further that intestinal amylase secretion is in phase with the feeding activity of the milkfish. Although the fishes used in this study fed mostly on the naturally occurring algae in the ponds, no cellulase activity was detected in any region of the digestive tract. Less active carbohydrases that were detected include a beta-glucosidase and beta-galactosidase, both of which were of limited substrate specificity.en
dc.language.isoenen
dc.publisherSpringer Verlagen
dc.subjectdigestive systemen
dc.subjectmilkfishen
dc.subjectChanos chanosen
dc.titleStudies on the carbohydrates in the digestive tract of the milkfish Chanos chanosen
dc.typeArticleen
dc.date.updated2012-08-23T13:21:07Z
dc.citation.volume61
dc.citation.issue2
dc.citation.spage247
dc.citation.epage254
dc.citation.journalTitleMarine Biologyen
dc.subject.asfaenzymatic activityen
dc.subject.asfametabolismen
dc.subject.asfacarbohydratesen
dc.subject.asfadiurnal variationsen
dc.subject.asfafeeding habitsen
dc.identifier.doi10.1007/BF00386667
dc.subject.scientificNameChanos chanos


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  • AQD Journal Articles [1213]
    These papers were contributed by AQD staff to various national and international journals

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