Alimentary Canal: Secretion and Digestion, Special Digestive Functions, and Absorption

Duke, Gary E.

doi:10.1007/978-1-4612-4862-0_12

Cited by 98 publications

(62 citation statements)

References 125 publications

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“…Gastroliths of these German farm ostriches were used for comparison (Wings 2004;Wings & Sander 2007). To facilitate and accelerate possible chemical effects on the gastroliths, hydrochloric acid (HCl) and pepsin significantly higher in concentration than in gastric juices of birds (Duke 1986a;Ziswiler & Farner 1972) were used for the simulated stomach juices. Freshly secreted gastric juice contains about 0.5 % HCl and has a pH around 2 (Duke 1986a;Schmidt-Nielsen 1997), but the normal pH in the stomach is slightly higher due to dilution by ingesta (Duke 1986a).…”

Section: Methodsmentioning

confidence: 99%

A simulated bird gastric mill and its implications for fossil gastrolith authenticity

Wings

2009

Fossil Record

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Section: Methodsmentioning

confidence: 99%

A simulated bird gastric mill and its implications for fossil gastrolith authenticity

Wings

2009

Fossil Record

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“…Varying the gizzard size by giving diets with a coarse structure provided evidence that gizzard function was a key determinant in the difference between D 1 and D 2 digestion efficiencies (Rougiè re et al, 2009). The stomach of chickens is divided into two compartments, the proventriculus or glandular part where the secretions of HCl and pepsinogen occur, and the gizzard or muscular part where the digesta are ground (Duke, 1986). Gizzard emptying in the duodenum is controlled by the pylorus that allows particles to move to the duodenum once they reach a critical size (Ferrando et al, 1987;Vergara et al, 1989a).…”

Section: Introductionmentioning

confidence: 99%

Comparison of gastrointestinal transit times between chickens from D+ and D− genetic lines selected for divergent digestion efficiency

Rougiere

Carré

2010

Animal

106

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D 1 (high digestion efficiency) and D 2 (low digestion efficiency) genetic chicken lines selected for divergent digestion efficiency were compared in this experiment. Gizzard functions were tested in terms of digesta mean retention time and reactions to high dilution of a corn diet with 15% coarse sunflower hulls. The corn standard (S) and high fibre (F) experimental diets were given from 9 days of age to chickens from both lines. Besides the measurements of growth efficiencies (9 to 20 days), digestibilities (20 to 23 days) and gut anatomy (0, 9, 29, 42 and 63 days), two digestive transit studies were performed at 9 and 29 days of age. For the transit studies, the S and F diets were labelled with 0.5% TiO 2 and 1% Cr-mordanted sunflower hulls. These diets were fed ad libitum during 3 days, and then the birds were euthanized. The digestive contents were analysed for the determination of marker concentrations and mean retention times (MRTs) in digestive compartments (crop 1 oesophagus, proventriculus 1 gizzard, duodenum 1 jejunum, ileum, rectum 1 cloaca and caeca) were determined. D 1 birds were confirmed as better digesters than D 2 birds during the growth period, in association with larger gizzard and pancreas, and lighter small intestine in D 1 than in D 2 birds. The MRT in the proventriculus-gizzard system, higher in D 1 than in D 2 birds, was a major factor associated with differences between D 1 and D 2 birds regarding digestion efficiencies and gut anatomy. Diet dilution with fibres reduced differences in digestion efficiencies and proventriculus-gizzard MRT between lines. Differences in gut anatomy between lines tended to disappear after 8 weeks of age. In conclusion, this study showed that MRT in the proventriculus-gizzard system was a major factor associated with genotype differences between the D 1 and D 2 genetic chicken lines selected for divergent digestion efficiency, with longer MRT found in D 1 than in D 2 birds.

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“…In this respect, Jiménez-Moreno et al (2013a) reported improvements in the CTTAR of the nutrients and AMEn of the diet with the inclusion of up to 5% OH but the benefits decreased with a further increase to 7.5%, consistent with the results reported herein. Insoluble fiber sources are retained for longer in the upper part of the GIT, increasing gizzard function, the intensity of the antiperistaltic movements and the production of HCl, amylase and bile acids (Duke, 1986;Hetland et al, 2003;Jiménez-Moreno et al, 2009). To notice that in the research of Kimiaeitalab et al (2016) and in the research reported herein, SFH was included at the expense of the basal diet and consequently, the calculated AMEn content of the SFH containing diet was lower than that of the control diet.…”

Section: Effects Of Sunflower Hulls Inclusionmentioning

confidence: 80%

“…the upper part of the digestive tract, stimulating gizzard function (Rogel et al, 1987;Hetland et al, 2005) and HCl secretion in the proventriculus (Duke, 1986). Effects on pH of chicken line and SFH inclusion were limited in Exp.…”

Section: And Conclusionmentioning

confidence: 97%

Comparative study of the inclusion of sunflower hulls in the diet on growth performance and digestive tract traits of broilers and pullets from 0 to 21 days of age

Kimiaeitalab¹

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Alimentary Canal: Secretion and Digestion, Special Digestive Functions, and Absorption

Cited by 98 publications

References 125 publications

A simulated bird gastric mill and its implications for fossil gastrolith authenticity

A simulated bird gastric mill and its implications for fossil gastrolith authenticity

Comparison of gastrointestinal transit times between chickens from D+ and D− genetic lines selected for divergent digestion efficiency

Comparative study of the inclusion of sunflower hulls in the diet on growth performance and digestive tract traits of broilers and pullets from 0 to 21 days of age

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