Avian Digestive System
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Avian Crop Function–A Review
Ann. Anim. Sci., Vol. 16, No. 3 (2016) 653–678 DOI: 10.1515/aoas-2016-0032 AVIAN CROP function – A REVIEW* * Bartosz Kierończyk1, Mateusz Rawski1, Jakub Długosz1, Sylwester Świątkiewicz2, Damian Józefiak1♦ 1Department of Animal Nutrition and Feed Management, Poznań University of Life Sciences, Wołyńska 33, 60-637 Poznań, Poland 2Department of Animal Nutrition and Feed Science, National Research Institute of Animal Production, 32-083 Balice n. Kraków, Poland ♦Corresponding author: [email protected] Abstract The aim of this review is to present and discuss the anatomy and physiology of crop in different avian species. The avian crop (ingluvies) present in most omnivorous and herbivorous bird spe- cies, plays a major role in feed storage and moistening, as well as functional barrier for pathogens through decreasing pH value by microbial fermentation. Moreover, recent data suggest that this gastrointestinal tract segment may play an important role in the regulation of the innate immune system of birds. In some avian species ingluvies secretes “crop milk” which provides high nutri- ents and energy content for nestlings growth. The crop has a crucial role in enhancing exogenous enzymes efficiency (for instance phytase and microbial amylase,β -glucanase), as well as the activ- ity of bacteriocins. Thus, ingluvies may have a significant impact on bird performance and health status during all stages of rearing. Efficient use of the crop in case of digesta retention time is es- sential for birds’ growth performance. Thus, a functionality of the crop is dependent on a number of factors, including age, dietary factors, infections as well as flock management. -
Raptor Digestion Facts
Raptor Digestion Facts For birds that have a crop, food passes to the crop to soften or to just be stored temporarily. From there food goes to the stomachs. Owls do not have crops, all other raptors do. Food is stored in the crop on the way down, but not on the way up. Birds have two stomachs (in this order): A glandular stomach (the proventriculus) which digests food chemically A muscular stomach or gizzard (the ventriculus) that grinds food with the aid or grit. In many carnivorous species – hawks, for example, their glandular stomach is so highly acidic, it dissolves bones. The bearded vulture of Europe and China is said to have a stomach so acidic it can dissolve the whole of a cow’s vertebra in one or two days. Pellets are formed in the gizzard. A given bird’s pellet will be the size and shape of their gizzard. The gizzard of birds serves the same function as the teeth and strong jaws of mammals. The gizzard is most developed in birds that eat plant parts. Birds intentionally ingest grit to be kept in their gizzard to help grind food. They can prevent this grit from passing through the digestive system with the food, and remain in the gizzard. Birds prefer brightly colored grit. Such examples of grit found in birds include: quartz, granite, ruby, gold, fruit pits, coal, ground oyster shells, black lava, and lead shot form shotguns (this of course causes lead poisoning, which we do see a lot of at Willowbrook). Many other birds cough-up pellets, especially those which feed much on insects. -
Life Science Journal 2013;10(2) 479
Life Science Journal 2013;10(2) http://www.lifesciencesite.com Histological Observations on the Proventriculus and Duodenum of African Ostrich (Struthio Camelus) in Relation to Dietary Vitamin A. Fatimah A. Alhomaid1 and Hoda A. Ali2 1Dept. of Biology, Collage of Science and Arts, Qassim University, KSA 2Dept. of Nutrition and Food Science, Collage of Designs and Home Economy, Qassim University, KSA. Email: [email protected]; [email protected] Abstract: Research problem: The fine structure of the gut in different avian species in relation to dietary vitamins status have widely been studied with the exception of ostriches. Objectives: To study the histological structure of the African ostrich proventriculus and duodenum in relation to two levels of vitamin A (7500 and 9000) IU/kg diet using light microscope. Methods: Twenty male African ostriches with average age 65-67 weeks and apparently healthy were used. They were divided into two equal groups, the first one received diet adjusted to supply 7500 IU/kg diet vitamin A. The second group fed diet formulated to furnished 9000 IU/Kg diet vitamin A. Both diets were isonitrogenous and isocaloric. Body weight gain, feed intake and feed conversion rate were calculated. At the end of four weeks, pieces from the different parts of proventriculus and duodenum were taken for light microscopic examinations. Result: Body weight gain and feed conversion rate were improved in group received 9000IU of vitamin A comparable to group fed 7500IU. Histological structure of proventriculus of birds receiving 7500 IU/Kg vitamin A showing vascular congestion, thinning connective tissue and sloughing of the columnar epithelia lining the central collecting duct. -
Ostrich Production Systems Part I: a Review
11111111111,- 1SSN 0254-6019 Ostrich production systems Food and Agriculture Organization of 111160mmi the United Natiorp str. ro ucti s ct1rns Part A review by Dr M.M. ,,hanawany International Consultant Part II Case studies by Dr John Dingle FAO Visiting Scientist Food and , Agriculture Organization of the ' United , Nations Ot,i1 The designations employed and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. M-21 ISBN 92-5-104300-0 Reproduction of this publication for educational or other non-commercial purposes is authorized without any prior written permission from the copyright holders provided the source is fully acknowledged. Reproduction of this publication for resale or other commercial purposes is prohibited without written permission of the copyright holders. Applications for such permission, with a statement of the purpose and extent of the reproduction, should be addressed to the Director, Information Division, Food and Agriculture Organization of the United Nations, Viale dells Terme di Caracalla, 00100 Rome, Italy. C) FAO 1999 Contents PART I - PRODUCTION SYSTEMS INTRODUCTION Chapter 1 ORIGIN AND EVOLUTION OF THE OSTRICH 5 Classification of the ostrich in the animal kingdom 5 Geographical distribution of ratites 8 Ostrich subspecies 10 The North -
Digestion of CHO, Fats, and Proteins
Handout 5 Carbohydrate, Fat, and Protein Digestion ANSC 619 PHYSIOLOGICAL CHEMISTRY OF LIVESTOCK SPECIES Digestion and Absorption of Carbohydrates, Fats, and Proteins I. Variations in stomach architecture A. Poultry (avian species in general) 1. The crop, proventriculus, and gizzard replace the simple stomach of other monogastrics. 2. The esophagus extends to the cardiac region of the proventriculus. 3. The proventriculus is similar to the stomach, in that typical gastric secretions (mucin, HCl, and pepsinogen) are produced. B. Omnivores 1. Nonglandular region – no digestive secretions or absorption occurs. 2. Cardiac region – lined with epithelial cells that secrete mucin (prevents lining of the stomach from being digested). 3. Fundic region – contains parietal cells (secrete HCl), neck chief cells (secrete mucin), and body chief cells (secrete pepsinogen, and lipase). 1 Handout 5 Carbohydrate, Fat, and Protein Digestion II. Architecture of gastrointestinal tracts in monogastrics, herbivores, and ruminants A. Monogastrics – pigs 1. Oral region – Saliva is secreted from the parotid, mandibular, and sublingual glands. α-Amylase in saliva initiates carbohydrate digestion. 2. Esophageal region – Extends from the pharynx to the esophageal portion of the stomach. 3. Gastric region – Dvided into the esophageal region, the cardiac region, and the fundic (proper gastric) region. The cardiac region elaborates mucus, proteases, and lipase. The action of α-amylase stops in the fundus, when the pH drops below 3.6. 4. Pancreatic region – The endocrine portion secretes insulin and glucagon (and other peptide whereas the jejunum (88-91%) and ileum (4-5%) form hormones) from the islets of the lower intestine. Pancreatic α-amylase, lipase, and Langerhans. The exocrine portion proteases are mixed with chyme from the stomach. -
Crop Problems
Text and photos: Monique de Vrijer Translation: Diana Hedrick CROP PROBLEMS The crop serves as a temporary ‘storage bin’ for the feed the chicken eats. It is often full during and at the end of the day and should normally be empty when the bird starts its day in the morning. Unfortunately ‘crop prob- lems’ are not an uncommon occurrence and presents as symptomatic with many dif- ferent illnesses and condi- tions. The Crop The crop is part of the digestive system and is an enlarged part of the esophagus at the foot of the neck where feed is (temporarily) stored and "moistened" with mucous and saliva from the mouth until the contents are moved into the stomach. A chicken has two stomachs, the proventriculus (the glandular stomach) and the gizzard or ventriculus (also called the muscular stomach). The feed is transported from the crop into the the glandular stomach which, as the name implies, is where secretory enzymes are added to the feed mass to aid in digestion; one of which is pepsin which in turn activates the stomach to produce hydrochloric (stomach) acid lowering the PH to aid in digestion and absorption of nutrients and also helps to dissolve the calcium grit (usually oyster shell) releasing the calcium in it. These enzyme-filled gastric juices infuse the feed as it moves onwards towards the gizzard (ventriculus or muscular stomach). The gizzard is a small organ and not able to deal with large quantities of feed. It is composed of two oval shaped and thick walled powerful muscles with a tough horny lining. -
A Disease Syndrome in Young Chickens 2-To 8-Weeks - Old Characterized by Erosion and Ulceration of the Gizzard Epithelial Linmg and Black Vomit Has Been Reported
Arch. Insh. Razi, 1981,32, 101-103 A CONDITION OF EROSION AND ULCERATION OF YOUNG CHICKEN'S GIZZARD IN IRAN By: M. Farshian SUMMARY: A disease syndrome in young chickens 2-to 8-weeks - old characterized by erosion and ulceration of the gizzard epithelial linmg and black vomit has been reported. The presence of a dark brown - co!oured fluid in the crop, proventri cul us, gizzard and small intestine was oftenly observed. Tue syndrome caused considerable mortaility losses and reduced weight gain in broilers. INTRODUCTION A few reports from the U.S.A. and Latin Amtrican countries have described a disease syndrome in young chickens known to poultrymen in latter terri tories as « Vomito Negro» or black vomit ( Cover and Paredes, 1971; Johnson and Pinedo; 1971). In Iran a condition very similar to the above mentioned syndrome, coming into being occasionally noticed in the past year or 50, has increased in incidence during the past six months, beginning September 1980. The following is an account of the clinical and gross pathological findings of the syndrome. Clinical signs : Affected chickens, 2-to 8 - weeks - old appeared depressed, lost their appetite and usually had pale combs and wattles. Birds were frequently Wlable to stand and sorne had their necks stretched on the groWld. A dark - coloured diarrhea was not uncommon. Death usually occurred within few hours from the onset of the symptoms. 101 The morbidity rate vearried from 5 % to 25 % and daily mortality ranged from 0.1 % to 1% The disease took a 2-to 3 - week course after which time it appeared that the birds developed sorne sort of resistance to the condition. -
Evaluating and Treating the Gastrointestinal System
CHAPTER 14 Evaluating and Treating the Gastrointestinal System STACEY GELIS, BS c, BVS c (Hons), MACVS c ( Avian Health) The avian gastrointestinal tract (GIT) has undergone a multitude of changes during evolution to become a unique anatomical and physiological structure when compared to other animal orders. On the one hand it has evolved to take advantage of the physical and chemi- cal characteristics of a wide variety of food types.1 On the other hand, it has had to do so within the limitations of the requirements for flight.2 To this end, birds have evolved a lightweight beak and muscular ventriculus, which replaces the heavy bone, muscular and dental structure characteristic of reptiles and mammals. The ventriculus and small intestine are the heaviest struc- tures within the gastrointestinal tract and are located near the bird’s centre of gravity within the abdomen. Greg J. Harrison Greg J. The overall length of the GIT is also less than that of a comparable mammal, another weight-saving flight adap- tation. Interestingly, these characteristics are still shared with the flightless species such as ratites and penguins. In addition, the actual digestive process needs to be rapid to support the high metabolic rate typical of flighted birds.3 Gastrointestinal adaptations to the wide range of ecolog- ical niches that birds occupy mean that birds can take advantage of a huge variety of foodstuffs. The GIT hence shows the greatest degree of diversity of all the organ systems between different avian taxa. However, the pres- sures of convergent evolution have also meant that many distantly related species have developed a similar gastrointestinal anatomy to take advantage of particular food niches.3,4 Examples of these will be presented in the discussion of each section of the GIT. -
Histogenesis of the Proventricular Submucosal Gland of the Chick As Revealed by Light and Electron Microscopy Dale S
HISTOGENESIS OF THE PROVENTRICULAR SUBMUCOSAL GLAND OF THE CHICK AS REVEALED BY LIGHT AND ELECTRON MICROSCOPY DALE S. THOMSON Malone College, Canton, Ohio ABSTRACT The development of the submucosal tubuloalveolar glands of the proventriculus was studied with both light and electron microscopes, with special reference given to the 13-18-day period. Beginning as an invagination in the stratified columnar epithelium lining the lumen of the proventriculus, the simple tubular gland, by repeated bifurcation of the invaginated portion, by sloughing of the superficial cells, and by remodeling of the residual basal cells from columnar to cuboidal, becomes a compound tubuloalveolar gland composed of numerous secretory units. Concomitant with the gross cellular changes, ultra- structural changes in the intercellular membranes are evident. By day 4 after hatching, the cells forming the secretory units appear to be functional. INTRODUCTION The avian stomach is peculiar in that it consists of two morphologically and physiologically distinct parts: the glandular portion, or proventriculus, and the muscular portion, or gizzard. The proventriculus is a relatively thick-walled structure located at the distal end of the oesophagus and containing both simple mucous-secreting glands and compound submucosal tubuloalveolar glands. The gizzard is a thick muscular bulb, the mucosa of which contains simple glandular cells which secrete a tough, horny layer. The proventriculus has been described by Cazin (1886, 1887), Zietschmann (1908), Calhoun (1933, 1954), Batt (1924), and Bradley and Graham (1950). Aitken (1958) and Toner (1963) further amplified the literature with specific reference to the compound submucosal glands. Sjogren (1941) and Hibbard (1942) described the embryonic development of the submucosal glands. -
An Important Health and Welfare Issue of Growing Ostriches
DOI: 10.2478/ats-2020-0016 AGRICULTURA TROPICA ET SUBTROPICA, 53/4, 161–173, 2020 Review Article Gastric impaction: an important health and welfare issue of growing ostriches Muhammad Irfan1, Nasir Mukhtar2, Tanveer Ahmad3, Muhammad Tanveer Munir4 1College of Veterinary Medicine, Kyungpook National University, Daegu 41566, Republic of Korea 2Department of Poultry Sciences (Station for Ostrich research & Development), Faculty of Veterinary and Animal Sciences, PMAS‑Arid Agriculture University, Rawalpindi, Pakistan 3Department of Clinical Sciences, Faculty of Veterinary Sciences, Bahauddin Zakariya University, Multan, Pakistan 4LIMBHA, Ecole Supérieur du Bois, 44306 Nantes, France Correspondence to: M. T. Munir, LIMBHA, Ecole Supérieur du Bois, 7 Rue Christian Pauc, 44306 Nantes, France. E‑mail: [email protected] Abstract Ostrich farming serves as a source for meat, feathers, skin, eggs, and oil. In general, ostriches are hardy birds that can resist a wide range of climatic harshness and some diseases. However, musculoskeletal and digestive complications, including the gastric impaction, remain the major cause of mortality. The gastrointestinal impaction alone is responsible for 30 – 46% of spontaneous deaths in growing ostriches. The literature review of 21 publications on this subject has shown that 90% of these incidents happen during first six months of life. The aetiology of this problem is mostly stress and behaviour‑related gorging of feed and picking on non‑feeding materials such as stone, sand, wood pieces, plastic, glass, and metallic objects. Conservative therapy or surgical approaches show good results with almost 70 to 100% recovery depending upon the clinical presentation and timely diagnosis. Overall, this literature review describes impaction in farmed ostriches, along with diagnosis, treatment, and control and preventive measures. -
Gastrointestinal Tract Morphometrics and Content of Commercial and Indigenous Chicken Breeds with Differing Ranging Profiles
animals Article Gastrointestinal Tract Morphometrics and Content of Commercial and Indigenous Chicken Breeds with Differing Ranging Profiles Joanna Marchewka 1,*, Patryk Sztandarski 1 , Zaneta˙ Zdanowska-S ˛asiadek 1, Dobrochna Adamek-Urba ´nska 2 , Krzysztof Damaziak 3, Franciszek Wojciechowski 1, Anja B. Riber 4 and Stefan Gunnarsson 5 1 Institute of Genetics and Animal Biotechnology, Polish Academy of Sciences, Jastrz˛ebiec, 05-552 Magdalenka, Poland; [email protected] (P.S.); [email protected] (Z.Z.-S.);˙ [email protected] (F.W.) 2 Department of Ichthyology and Biotechnology in Aquaculture, Institute of Animal Science, Warsaw University of Life Sciences, 02-786 Warsaw, Poland; [email protected] 3 Department of Animal Breeding, Faculty of Animal Breeding, Bioengineering and Conservation, Institute of Animal Science, Warsaw University of Life Sciences, 02-786 Warsaw, Poland; [email protected] 4 Department of Animal Science, Aarhus University, DK-8830 Aarhus, Tjele, Denmark; [email protected] 5 Department of Animal Environment and Health, Swedish University of Agricultural Sciences (SLU), S-532 23 Skara, Sweden; [email protected] * Correspondence: [email protected] Simple Summary: Differences in the range use by poultry exist on the individual or breed level, even if equal opportunity of outdoor access is provided. Birds reared with access to the pasture consume some of Citation: Marchewka, J.; Sztandarski, the material found outdoors, such as plants, insects, and stones. The frequency of outdoor range use may P.; Zdanowska-S ˛asiadek, Z.;˙ Adamek-Urba´nska,D.; Damaziak, K.; be associated with the ingested material and the development of the bird gut. -
A Simulated Bird Gastric Mill and Its Implications for Fossil Gastrolith Authenticity
Fossil Record 12 (1) 2009, 91–97 / DOI 10.1002/mmng.200800013 A simulated bird gastric mill and its implications for fossil gastrolith authenticity Oliver Wings Steinmann-Institut fr Geologie, Mineralogie und Palontologie, Universitt Bonn, Nussallee 8, 53115 Bonn, Germany. E-mail: [email protected] Current address: Museum fr Naturkunde Berlin, Invalidenstraße 43, 10115 Berlin, Germany. Abstract Received 12 June 2008 A rock tumbler, stones, water, plant material, hydrochloric acid, and pepsin were used Accepted 15 August 2008 to simulate a bird gizzard in order to study abrasion rate and influence of stomach Published 20 February 2009 juices and foodstuff on gastrolith surface development. The experiment lasted for six months. Each week, the “stomach” was supplied with fresh grass and stomach juices. After the end of the experiment, the set of stones had a combined weight loss of 22.4%, with softer rock types showing higher abrasion rates. The combination of sto- mach juices and silica phytoliths within the grass had no visible effect on stone surface development: polish or pitting did not occur. A second experiment combined only peb- bles with water in the tumbler. Results indicate that rock abrasion is mainly caused by contacts between moving stones. A comparison with authentic ostrich gastroliths Key Words showed that abrasion in the artificial stomach must have been lower than in a real gizzard, but still too high to maintain or develop surface polish. If high polish occa- stomach stones sionally seen on sauropodomorph dinosaur gastroliths was indeed caused in a stomach artificial gizzard environment, it implies digestive processes different from those of extant birds and the clast surface development “artificial gizzard”.