| Article |
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| Article name |
Peculiarities of Enzyme Excretory Function of Birds’ Pancreatic Gland as Against Mammals |
| Authors |
Vertiprakhov V.G.Doctor of Biology, professor vetfarm2008@mail.ruFomenko E.G.Candidate of Biology feg2000@yandex.ruButenko M.N.graduate student 44mary44@mail.ru |
| Bibliographic description |
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| DOI |
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| UDK |
633:577.15 |
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| Annotation |
Data on the activity of pancreatic enzymes in birds and mammals obtained in chronic experiments on fistuled individuals and on the enzymatic activity of pancreatic tissue are presented. The results showed that amylase activity in pancreatic tissue is 3.3 times higher in broiler chicks compared to pigs, protease activity is 2.6 times higher. High metabolic rate in birds is therefore related to higher enzymatic activity in pancreatic secretion; the difference in feed conversion ratio (FCR, kg of feed per 1 kg of live bodyweight gain: ca. 2.0 in broilers while 3.5 in pigs) confirms this conception.
Amylase/protease ratio in ruminants was found to be similar to birds though amylase activity in chicken is almost 14 times higher compared to ruminants and protease activity is 11.5 times higher.
Enzymatic activity of the pancreas in horses is intermediate between ruminants and omnivorous because diets for horses are primarily based on grass (hay) and relatively little amounts of concentrates. The amylase activity in horse is 11 times lower, protease activity is 12 times lower compared to chicken.
The differences between the activities of pancreatic enzymes in birds and mammals are ontogenetically conditioned and become especially apparent during adaptation to protein additives in diets.
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| Key words |
digestive system physiology, enzyme excretory function of birds’ pancreatic gland, mammals, protein additives. |
| Article information |
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| References |
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