Publication: Development of specific activity of amylolytic and proteolytic enzymes in duodenum and jejunum of the small intestinal tract of meat-type ducks during 1-42 days of age
2
Issued Date
2017
Resource Type
Language
eng
ISSN
1906-2257
Rights
Mahidol University
Rights Holder(s)
Faculty of Veterinary Science Mahidol University
Bibliographic Citation
Journal of Applied Animal Science. Vol.10, No.3 (2017), 19-30
Suggested Citation
Kriengkrai Prahkarnkaeo, Kiattawee Choowongkomon, Boonorm Chomtee, Choawit Rakangthong, Chaiyapoom Bunchasak Development of specific activity of amylolytic and proteolytic enzymes in duodenum and jejunum of the small intestinal tract of meat-type ducks during 1-42 days of age. Journal of Applied Animal Science. Vol.10, No.3 (2017), 19-30. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/15263
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Organizational Units
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Journal Issue
JAAS Vol. 10 No. 3
(2560)
Thesis
Title
Development of specific activity of amylolytic and proteolytic enzymes in duodenum and jejunum of the small intestinal tract of meat-type ducks during 1-42 days of age
Alternative Title(s)
การเปลี่ยนแปลงของการทำงานของเอนไซม์ย่อยแป้งและเอนไซม์ย่อยโปรตีนในลำไส้เล็กดูโอดีนัมและเจจูนัมของเป็ดเนื้อ
Abstract
This experiment was conducted to elucidate the pattern of amylolytic and proteolytic digestive enzyme
activities in meat-type ducks during 1-42 days of age. Twenty-eight male meat type ducks (Cherry Valley strain)
were used, and diets based on corn-soybean meal were offered ad lib throughout the experimental period.
At duodenal and jejunal segments, the specific activity (SA) of amylolytic (amylase) and proteolytic (trypsin,
chymotrypsin and total proteases) enzymes were determined at 1, 7, 14, 21, 28, 35 and 42 days of age. Maximal
or nearly maximal SA of all enzymes at first day after hatch (1 day of age) and the activity declined on 7 day of age
was found (P<0.05). After 7 days of age, all enzymes tended to reach a nadir at day 14 or day 21, then the SA
were significantly increased from 21 to 42 days of age (P<0.05). Therefore, the pattern of SA of all enzymes at
duodenal and jejunal segments were changed in a cubic trend (P< 0.01) with age. In ducks, it is indicated that
the embryonic enzyme reserve may be a reason of high SA of amylolytic and proteolytic enzymes at 1 day of age,
then the SA are activated again after 21 days of age by intestinal development processes and/or increasing
amount of feed intake.