Studies on the carbohydrates in the digestive tract of the milkfish Chanos chanos
![Thumbnail](https://repository.seafdec.org.ph/bitstream/10862/1039/3/1039-ChiuYN1981.pdf.jpg)
រកមើល / បើក Open
Request this document
កាលបរិច្ឆេទ
1981Page views
193ទិន្នន័យមេតា
មើលកំណត់ត្រាលម្អិតនៃធាតុCited times in Scopus
Share
អរូបី
Crude 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.
ការពិពណ៌នា
SEAFDEC Contribution no. 71.
Suggested Citation
Chiu, 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. https://doi.org/10.1007/BF00386667
ប្រធានបទ
Taxonomic term
បណ្តុំបណ្តុំ
- AQD Journal Articles [1222]
Related items
Showing items related by title, author, creator and subject.
-
Annual report 1977
Southeast Asian Fisheries Development Center, Aquaculture Department (Aquaculture Department, Southeast Asian Fisheries Development Center, 1978) -
Development and management of milkfish broodstock
Reyes, Ofelia S.; de Jesus-Ayson, Evelyn Grace T.; Eullaran, Bernadita E.; Corre Jr., Valeriano L.; Ayson, Felix G. (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)The manual provides developed and refined techniques for collection and transport of spawned eggs and larvae, as well as larval rearing. It also describes the necessary facilities for maintaining milkfish broodstock. Guidelines ... -
Seed production of milkfish Chanos chanos Forsskal
Reyes, Ofelia; Eullaran, Bernadita; Ayson, Evelyn Grace (Aquaculture Department, Southeast Asian Fisheries Development Center, 2016)A 26-page manual describing the site selection, hatchery design, spawning, larval rearing, natural food production, and economic analysis for milkfish.