scholarly journals The Bio-economic Effect of Nutrient Intake Restrictions During the Rearing Period and Post “Peak” Egg Production Feed Restriction on Four Commercial Meat-type Parental Genotypes

1973 ◽  
Vol 52 (4) ◽  
pp. 1269-1282 ◽  
Author(s):  
F.G. Proudfoot ◽  
W.F. Lamoreux
Keyword(s):  
Nutrient Intake ◽  
Egg Production ◽  
Economic Effect ◽  
Feed Restriction ◽  
Meat Type

Probiotics in the diets of laying quails

2020 ◽  
pp. 60-66
Author(s):  
O. Merzlyakova ◽  
V. Rogachyev ◽  
V. Chegodaev
Keyword(s):  
Bacillus Subtilis ◽  
Bacillus Licheniformis ◽  
Egg Production ◽  
Positive Impact ◽  
Hematological Parameters ◽  
Economic Effect ◽  
Egg Laying ◽  
Control Group ◽  
Egg Mass ◽  
The Cost

The efficiency of introducing probiotics based on strains of Bacillus subtilis, Bacillus licheniformis and their consortium in the amount of 150 g/t of feed into the diets of laying quails has been studied. The experiment lasting 182 days has been carried out on four groups of quails with 30 heads in each. The quails have been housed in the broiler battery in compliance with the required microclimate conditions. Quails of all groups have been received the main diet (compound feed) developed taking into account their age and physiological characteristics. The quails of the 1st, 2nd and 3rd experimental groups in addition to the main diet received probiotics (150 g/t compound feed) based on strains Bacillus subtilis, Bacillus licheniformis and their consortium, respectively. It has been found that feeding the laying quails of the consortium of strains Bacillus subtilis and Bacillus licheniformis had the most significant positive impact on their productive performance, it allowed to increase egg production by 7,81 %, egg laying intensity by 5,0 %, egg mass yield by 9,77 %, while reducing feed expenditures for 10 eggs by 13,35 %. The yield of hatching eggs has been increased by 7,03 %, hatchability of chickens from laid and fertilized eggs by 8,33 and 8,35 %, brooding waste decreased by 21,74 %. Hematological parameters of quails during the whole experiment were within the physiological norm. The economic effect calculated on the basis of data on the cost of compound feed, probiotics and the cost of sold eggs of quail laying was 14,56 % in the 3rd experimental group (in relation to the control group).

scholarly journals Resizing the productive characteristics of meat-type quail through principal component analysis

2020 ◽  
Vol 72 (3) ◽  
pp. 970-976
Author(s):  
D.U. Tyska ◽  
A.G. Gotuzzo ◽  
N.J.L. Dionello ◽  
R. Negri ◽  
R.P. Della-Flora ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Egg Production ◽  
Egg Quality ◽  
Principal Component ◽  
Production Data ◽  
Animal Science ◽  
Successive Generations ◽  
Production Period ◽  
The Relationship ◽  
Meat Type

ABSTRACT This study aimed to establish criteria for eliminating redundant variables, to know the magnitude of the data relationship, and to provide information that helps researchers in the use of the technique to analyze and interpret production data and egg quality. The data used in this work was obtained from four successive generations of the quail lineage developed by the Department of Animal Science of the Federal University of Pelotas. The characteristics were measured from the 42nd day of age, when the egg production period began, until 126 days of production, obtaining three 28 day periods (cycles) in the four successive generations, totaling 545 females. Of the twelve original variables, only seven demonstrated potential to be maintained in future experiments, representing a 42% exclusion. The main philosophy of this study was the analysis of the studied variables and made possible the understanding of the relationship and the correlations.

scholarly journals QUAIL EGG PRODUCTION WHEN SUPPLEMENTING THE DIET WITH BIOACTIVE SUBSTANCE

2021 ◽  
pp. 60-65
Author(s):  
P.I. Baryshnikov ◽  
◽  
L.V. Rastopshina ◽  
N.A. Novikov ◽  
V.M. Zhukov ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Egg Production ◽  
Economic Effect ◽  
Control Group ◽  
Optimal Dosage ◽  
Trial Group ◽  
Egg Weight ◽  
Bioactive Substance ◽  
Feed Costs ◽  
Experimental Findings

This paper discusses the experimental findings on lay-ing quails when their diets were supplemented with iodine and starch mixture. Five groups of 120 comparable quails bred in the Omsk Region were formed; the sex ratio was 1:4. The first group was the control; the birds were fed the main diet without the iodine supplement; the 2nd, 3rd, 4th and 5th groups were trial groups where the main diet was supplemented with iodine (potassium iodide) + starch (1:4) immediately before feeding. The dosages of the tested product in the trial groups were as following (in terms of iodine, mg per 100 g of feed): the 2nd group -0.05; 3rd -0.075; 4th -0.10; 5th -0.125. The experiment lasted for 180 days. Throughout the experiment, the largest number of eggs was obtained in the 3rd trial group -15240 eggs, more by 18.1% than in the control group (P ≥ 0.99). The laying quail day egg production in the 3rd trial group was 25.4 eggs, more by 13.0% than that in the control group. In the 2nd, 3rd, 4th, and 5th trial groups, the average egg weight was less than in the control, respectively, by 4.5; 7.1 and 8.0%. The number of produced eggs in the 3rd trial group was more than in the control group by 17.0% (P ≥ 0.95), and the intensity of egg production -by 10.0%. The feed costs were lower in the trial groups by 0.16-15.57% for the production of 10 eggs; and for the production of 1 kg of eggs in the 3rd and 4th trial groups -by 9.08 and 3.12% than in the control. The profitability in the 3rd trial group made 54.2%; that was by 1.59% higher than in the control group. The optimal dosage of iodine as much as 0.075 mg per 100 g of complete feed was determined which contrib-uted to obtaining a greater economic effect in quail egg production.

THE PERFORMANCE OF LAYING HENS REARED ON RESTRICTED AND FULL FEEDING PROGRAMS

1959 ◽  
Vol 39 (2) ◽  
pp. 217-225 ◽  
Author(s):  
T. M. MacIntyre ◽  
J. R. Aitken
Keyword(s):  
Body Weight ◽  
Specific Gravity ◽  
Egg Production ◽  
Egg Size ◽  
Laying Hens ◽  
Feed Restriction ◽  
Feeding Programs ◽  
The Mean ◽  
Late Start ◽  
Held Back

Experiments were conducted in 3 successive years to measure the effect on the performance of laying hens of restricting feed during the rearing period on range. About 1100 birds were reared and carried through a laying year in each experiment. Feed restriction was 72, 76 and 63 per cent of full feed for the test groups in Experiments 1, 2, and 3 respectively. All birds were full-fed in the laying house.Feed restriction changed the pattern of egg production, in that the restricted birds came into production later but subsequently laid at a higher rate than their full-fed counterparts. After 318 and 322 days in production the restricted birds in Experiments 1 and 2 respectively had overcome the disadvantage of a late start (7 and 14 days) and produced as many eggs as the full-fed birds. In Experiment 3, the restricted birds were held back 20 days, and after 315 days in production were still significantly behind in number of eggs produced.The restricted birds in the three experiments consumed an average of 0.17 pounds less feed per dozen eggs over the combined rearing and laying periods This amounts to a saving of 3 pounds of feed per bird, since the mean egg production of the restricted groups was 18 dozen eggs per bird.Early egg size was markedly increased by feed restriction and egg weights taken later in the year (after 3 months in production) remained slightly higher for the restricted groups. Albumin score for eggs from the restricted birds was better in all tests, but not significantly so in any given experiment. Specific gravity of the eggs was not influenced by feed restriction.Mortality on range and in the laying house was not affected by feed restriction on range. Body weight at housing time was much lower for the restricted birds but was not significantly lower at the end of the laying year.

Evaluation of various molting methods with perspective of post-molting performance in Japanese quails

2017 ◽  
Author(s):  
Shaukat Ali ◽  
Raheela Akhtar ◽  
Muhammad Younus ◽  
Heinrich Neubauer ◽  
Hafez Hafez ◽  
...  
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Feed Efficiency ◽  
Egg Production ◽  
Aluminum Sulfate ◽  
Body Weight Gain ◽  
Feed Consumption ◽  
Feed Restriction ◽  
Japanese Quails ◽  
High Feed

The post-molting performance of 360 female Japanese quails was assessed using five molting methods including feed restriction along with supplementation of dietary levels of aluminum sulfate (AlSO4) and zinc oxide (ZnO) with two concentrations of 0.15% and 0.3%. None of the parameters studied were positively influenced by a single molting method. Body weight gain and feed efficiency were positively affected by higher concentration of ZnO while feed consumption was positively influenced by higher concentration of AlSO4. Similarly high feed efficiency was attributed to higher concentrations of both ZnO and AlSO4. On other hand body weight gain and feed efficiency were negatively influenced by 0.15% ZnO while egg production was worst by 0.15% AlSO4. As each of the molting method had different influence on the tested parameters and none of them could apply individually with perspective of better performance therefore the combinational use of molting methods is recommended according to the focused parameter

scholarly journals The melanocortin circuit in obese and lean strains of chicks

2006 ◽  
Vol 190 (2) ◽  
pp. 527-535 ◽  
Author(s):  
Gideon Hen ◽  
Sara Yosefi ◽  
Victoria Simchaev ◽  
Dmitry Shinder ◽  
Victor J Hruby ◽  
...  
Keyword(s):  
Food Intake ◽  
Broiler Chickens ◽  
Egg Production ◽  
Feed Restriction ◽  
Broiler Chicks ◽  
Mrna Levels ◽  
Gene Encoding ◽  
Wing Vein ◽  
Pomc Mrna ◽  
Ad Libitum

Agonists of membranal melanocortin 3 and 4 receptors (MC3/4Rs) are known to take part in the complex control mechanism of energy balance. In this study, we compared the physiological response to an exogenous MC3/4R agonist and the hypothalamic expression of proopic melanocortin (POMC) gene, encoding few MC3/4R ligands, between broiler and layer chicken strains. These strains, representing the two most prominent commercial strains of chickens grown for meat (broilers) and egg production (layers), differ in their food intake, fat accumulation, and reproductive performance and, therefore, form a good model of obese and lean phenotypes, respectively. A single i.v. injection of the synthetic peptide melanotan-II (MT-II; 1 mg/kg body weight) into the wing vein of feed-restricted birds led to attenuation of food intake upon exposure to feeding ad libitum in both broiler and layer chickens. A study of the POMC mRNA encoding the two prominent natural MC3/4R agonists, α-MSH and ACTH, also revealed a general similarity between the strains. Under feeding conditions ad libitum, POMC mRNA levels were highly similar in chicks of both strains and this level was significantly reduced upon feed restriction. However, POMC mRNA down-regulation upon feed restriction was more pronounced in layers than in broilers. These results suggest: (i) a role for MC3/4R agonists in the control of appetite; (ii) that the physiological differences between broilers and layers are not related to unresponsiveness of broiler chickens to the satiety signal of MC3/4R ligands. Therefore, these findings suggest that artificial activation of this circuit in broiler chicks could help to accommodate with their agricultural shortcomings of overeating, fattening, and impaired reproduction.

Sign in / Sign up

Export Citation Format

Share Document