Showing papers in "Poultry Science in 1976"

TL;DR: In 12 experiments with S.C.W.L. roosters it was shown that for each of 12 feedingstuffs there was a linear relationship between feed input and the amount of energy voided as excreta, and the true metabolizable energy (T.M.E.) value of dextrose is its gross energy value.

TL;DR: Improvements were obtained in efficiency of protein and calorie utilization using this technique of formulation and growth rate and efficiency of feed utilization of chicks fed such diets were equal to that attained by chicks fed diets formulated by conventional means.

TL;DR: The phytate phosphorus recovered in the feces of the 4 and 9 week old chicks and the laying hens fed the diet containing corn was 100, 98, and 92%.

TL;DR: An improved technique is described for in vitro culture of the chick embryo from three days through 21 days of total incubation (three days in shell plus 18 days in culture) and possible causes of growth retardation in vitro are briefly discussed.

TL;DR: Changing the level of dietary calcium and phosphorus had little or no effect on the retention of phosphorus thus suggesting a relatively constant and low requirement for this nutrient.

TL;DR: Lighting regime had no significant effect on feed to gain ratio, percent crooked toes or mortality to 8 weeks, but birds grown on continuous light had significantly more leg abnormalities than those grown on any of the intermittent regimes.

TL;DR: Observations during the selection program on the incidence of spondylolisthesis and twisted legs in birds younger than eight weeks of age indicated that these other skeletal defects were unrelated to tibial dyschondroplasia.

TL;DR: In this paper, the yolk was cut in half, and one half was put into 6% potassium dichromate for 18 hours at 60-70° C. Staining formalin fixed slices with acidified ferrocyanide yielded rings of Prussian blue, a test for forms of iron.

TL;DR: Investigation of hysteria affecting White Leghorn female chickens found modification of the environment to reduce social pressure was successful in preventing nervousness and hysteria, e.g., adding nests and perches to community cages and moving flocks to less crowded housing.

TL;DR: It is found that overt agonistic behavior has any measurable effect on productivity in colony cages, and no associations were found between frequencies of agonistic acts by flocks and their egg production or between social status of individuals and duration of time feeding.

TL;DR: It appears that a significant reduction in carcase contamination rate could be achieved by minimizing Salmonella in the meal and grain constituents of poultry feed.

TL;DR: The bacteriological and histopathological changes in the ceca of young chickens after being infected with sporulated oocysts of Eimeria tenella were investigated andagonism between proliferated bacteria (clostridia and enterobacteria) and lactic acid bacteria (lactobacilli and bifidob bacteria) whose intensity is suppose to be related to the cecal mucosa is suggested during cecic coccidiosis in chickens.

TL;DR: The data indicate that bile salts appear to be effective in improving the absorption of saturated-type fats only in young chicks whose absorptive mechanism for fat is not fully developed.

TL;DR: In this article, a total of 216 individually caged Single Comb White Leghorn pullets were divided into two equal groups and subjected to either a 21 ± 0.75° C. or a 32 ± 1.5°C. environmental temperature, both with 50% relative humidity.

TL;DR: In this paper, the biological availability of biotin occurring in cereals, compared to added biotin, was determined by a chick growth assay, and the results derived from five samples of barley were variable, the highest value for the biotin availability was 22%, the others were considerably lower.

TL;DR: Two experiments were conducted with commercial Leghorn-type hens in advance state of production to determine response to a 16% protein, corn-soy diet with no added salt, and there was an immediate and significant decline in feed consumption and body weight.

TL;DR: Dietary citrinin fed to mature laying hens at levels of 0, 50, and 250 mug/g.

TL;DR: In this paper, it was shown that calcification of the egg shell begins just prior to the egg entering the uterus and that small calcium rich clusters are deposited on the outer shell membrane in the isthmus.

TL;DR: Broilers offered higher energy diets consumed a greater number of calories but converted these to gain with little impairment in caloric efficiency and growth rate and efficiency of feed utilization were almost direct functions of the dietary nutrient density level.

TL;DR: A great deal more evidence from well constructed human diet studies will be needed before low cholesterol diets can be recommended to the general population as an aid to control of cholesterol balance and heart disease.

TL;DR: Within matings, fearfulness and egg production as well as fearness and livability tended to be negatively related, and over matings within either cage size or cage tier there was no relationship between these factors, indicating a genetic component to the relationship betweenFearfulness and either egg production or livability.

TL;DR: Amino acid composition was determined for palm kernel meal (PKM), soybean meal (SBM), cottonseed meal (CSM), and rapeseed meal (RSM) as discussed by the authors.

TL;DR: The study was designed to follow the Salmonella infection rate in a poultry flock during the growth period until processing at 8-9 weeks and found that the infection rate was as high as 37.5% initially and dropped significantly by the 3rd to the 5th weeks.

TL;DR: Three experiments were made to measure the effect of the type of the assay bird on the true metabolizable energy (T.M.W.E.) values of certain feedingstuffs in chickens of different strains.

TL;DR: In this paper, the nutritional value of sunflower meal was investigated at various processing temperatures, and the possibility of replacing soybean meal by Sunflower meal in poultry diets was investigated, with the criteria used were: determination of available phosphorus, available lysine, net protein value and the metabolizable energy.

TL;DR: The level of Se in the kidney, liver, or heart which a Se source produces seems to be more important for preventing exudative diathesis than that which is found in the pancreas or muscle.

TL;DR: Two experiments were conducted to determine the ability and extent of self-regulation of protein intake by the laying hen and the differences in egg production, change in body weight, serum calcium, egg weight and egg specific gravity between groups were greatly reduced.

TL;DR: Six experiments were conducted with male broiler chicks kept in battery brooders to investigate the effects of feeding diets high in copper on the integrity of the gizzard lining, and the addition of zinc, vitamin E, and vitamin B12 did not prevent gizzard damage caused by high copper levels.

TL;DR: In this paper, metabolic energy and metabolizable energy corrected to nitrogen equilibrium (M.E.n) were determined for raw and autoclaved samples of four grain legumes, seven oilseed meals and five animal protein concentrates, using 9-day old White Leghorn cockerels.

TL;DR: The results of the experiments indicated that dietary salt deficiency is effective for the force resting of laying hens.