title: Comparative development of digestive organs, intestinal disaccharidases and some blood metabolites in broiler and layer-type chicks after hatching.
abstract: 1. Body weight, digestive organ weights, and activities of disaccharidases (maltase and saccharase) activities were determined from day of hatch to 21 d of age in meat- and egg-type chickens. Blood plasma was analysed for enzyme activities and metabolite concentration. 2. In meat-type chickens food intake and growth rate were about 3-fold those in egg-type chickens. Food efficiency was superior in meat-type chickens throughout the experimental period. 3. Meat-type chickens hatched with disaccharidase activities exceeding those found in their egg-type counterparts 2- to 5-fold. From 7 d of age on, this trend reversed, i.e. activity was much higher in egg-type than in meat-type chickens. 4. Blood plasma amylase activity increased gradually in meat-type chickens and was higher than in egg-type chickens to 14 d of age. No breed differences were observed for alkaline phosphatase or lactate dehydrogenase activities during the experimental period. 5. Blood plasma concentrations of total protein, albumin, glucose, and calcium, were lower in meat than in egg-type chickens.
authors.affiliation: Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot.
authors.forename: M
authors.initials: M
authors.lastname: Mahagna
authors.forename: I
authors.initials: I
authors.lastname: Nir
mesh_terms: D020155:3-Hydroxybutyric Acid; D000375:Aging; D000469:Alkaline Phosphatase / Q000097:blood; D000704:Analysis of Variance; D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D001798:Blood Proteins / Q000032:analysis; D001835:Body Weight; D002118:Calcium / Q000097:blood; D002645:Chickens / Q000254:growth & development*; D002784:Cholesterol / Q000097:blood; D004064:Digestive System / Q000033:anatomy & histology / Q000254:growth & development*; D004531:Eggs; D006885:Hydroxybutyrates / Q000097:blood; D007422:Intestines / Q000201:enzymology; D007770:L-Lactate Dehydrogenase / Q000097:blood; D008297:Male; D008460:Meat; D009929:Organ Size; D010758:Phosphorus / Q000097:blood; D013045:Species Specificity; D013393:Sucrase / Q000378:metabolism*; D014280:Triglycerides / Q000097:blood; D000516:alpha-Amylases / Q000097:blood; D000520:alpha-Glucosidases / Q000378:metabolism
chemical_list: D001786:Blood Glucose; D001798:Blood Proteins; D006885:Hydroxybutyrates; D014280:Triglycerides; D010758:Phosphorus; D002784:Cholesterol; D007770:L-Lactate Dehydrogenase; D000469:Alkaline Phosphatase; D000516:alpha-Amylases; D000520:alpha-Glucosidases; D013393:Sucrase; D002118:Calcium; D020155:3-Hydroxybutyric Acid