scholarly journals Evaluating the effects of crab meal, Carophyll Red®, and Carophyll Yellow® in laying hen diets on egg yolk pigmentation and production performance

2008 ◽  
Vol 88 (4) ◽  
pp. 637-640 ◽  
Author(s):  
Derek M Anderson ◽  
Janice L MacIssac ◽  
Michelle A Daniel ◽  
Tara L MacKinnon ◽  
Krista L Budgell
Keyword(s):  
Key Words ◽  
Egg Production ◽  
Egg Yolk ◽  
Laying Hen ◽  
Production Performance ◽  
White Leghorn ◽  
Effect Of Treatment

A total of 480 Babcock White Leghorn hens (65 wk of age) were randomly assigned to one of five diets [wheat-based control (C), 10 g t–1 Carophyll Red® (CR), 20 g t–1 Carophyll Yellow® (CY), 10 g t–1 CR + 20 g t–1 CY (CR + CY), 80 kg t–1 crab meal (CM)] for 60 d. There was no effect of treatment on egg production. There was an increase in red pigmentation (a* score) on day 45 among treatments supplemented with CR, CR + CY and CM when compared with C and CY. The laying hen was capable of depositing the natural carotenoid supplied by the CM into the egg yolk. Key words: Laying hen, crab meal, carotenoids, astaxanthin, yolk pigmentation

Effects of xylanase enzyme supplementation to corn/wheat-based diets on performance and egg quality in laying hens

2010 ◽  
Vol 90 (2) ◽  
pp. 207-212 ◽  
Author(s):  
Y. Cufadar ◽  
A Ö. Yıldız ◽  
O. Olgun
Keyword(s):  
Key Words ◽  
Laying Hens ◽  
Egg Quality ◽  
Egg Yolk ◽  
Laying Hen ◽  
White Leghorn ◽  
Xylanase Enzyme ◽  
Enzyme Supplementation

This study was conducted to determine the effects of xylanase supplementation of corn/wheat-based diets on the performance and egg quality of laying hens. At 52 wk of age, 180 White Leghorn LSL laying hens were fed 15 diets, consisting of five corn:wheat ratios and three levels of enzyme. None of the treatments affected performance or egg quality, except for egg yolk index and egg yolk color. The egg yolk color was improved by the increase in dietary corn level. It is concluded that wheat can be used instead of corn as an energy feedstuff in laying hen diets. Key words: Egg quality, laying hen, performance, xylanase

Effect of Supplementation of Multi Enzymes on Production Performance and Egg Quality Traits in White Leghorn Layers

2016 ◽  
Vol 12 (2) ◽  
Author(s):  
C. Pandian ◽  
A. Sundaresan ◽  
A. V. Omprakash
Keyword(s):  
Egg Production ◽  
Egg Quality ◽  
Live Weight ◽  
Economic Benefits ◽  
Production Performance ◽  
Feed Consumption ◽  
Quality Traits ◽  
White Leghorn ◽  
Significant Difference ◽  
Enzyme Supplementation

The present study was conducted to assess the effect of supplementation of Multi-enzymes with lysophospholipids on production performance of pure line White Leghorn layers. Body weights before and after the experiment did not differ significantly across the experimental diets. Irrespective of the dietary treatments, the birds gained 3.83 per cent of live weight relative to its initial body weight. Mean per cent Hen housed egg production was significantly (Pis less than 0.05) higher in diet supplemented with 0.10 MEC-L than other groups. Mean egg weight and average daily feed consumption during 25 to 35 weeks of age indicated no significant effect of enzyme supplementation. Average daily feed consumption per bird in control, 0.05 % and 0.1% multi-enzyme supplemented groups was 108.13, 105.66 and 107.67 g respectively and birds offered control diet recorded numerically more feed intake than enzyme supplemented groups. Comparatively low feed per egg was observed in 0.10 per cent group followed by 0.05 per cent group which offers economic benefits than control diets. However, the egg quality traits between different dietary enzyme supplementation groups showed no significant difference.

SUBSTITUTION OF SORGHUM FOR WHEAT IN DIETS FOR LAYING HENS

1982 ◽  
Vol 62 (1) ◽  
pp. 305-306 ◽  
Author(s):  
E. E. GARDINER ◽  
D. J. MAJOR ◽  
S. DUBETZ
Keyword(s):  
Body Weight ◽  
Key Words ◽  
Egg Production ◽  
Laying Hens ◽  
Feed Consumption ◽  
White Leghorn ◽  
Egg Weight ◽  
Single Comb

The effects of substituting various levels of sorghum for wheat in diets for laying hens were studied. Egg production, egg weight, feed consumption, body weight and hatchability of eggs from Single Comb White Leghorn hens were not affected by the proportion of sorghum in the diet. Key words: Sorghum, wheat, nutrition, egg production

AN ETHOGRAM OF WHITE LEGHORN-TYPE HENS IN BATTERY CAGES

1990 ◽  
Vol 70 (3) ◽  
pp. 751-760 ◽  
Author(s):  
A. B. WEBSTER ◽  
J. F. HURNIK
Keyword(s):  
Key Words ◽  
Egg Production ◽  
Age Effect ◽  
Feed Consumption ◽  
Behavioral Adaptation ◽  
White Leghorn ◽  
Video Recordings ◽  
Behavioral States ◽  
Physical Displacement ◽  
Over Time

The purpose of this study was to record the ethogram of White Leghorn-type hens in cages and to note changes in behavior over the course of the laying period. Three hundred and eighty-four hens derived from two male parental stocks were randomly assigned as pairs to the cages of two three-tiered, semi-stairstep batteries. Hens within pairs were of the same stock, and the batteries were in the same room. The laying phase comprised 13 28-d periods and on the first 4 d of periods 1, 3, 5, 7, 9 and 11 video recordings were made of eight cages per day. Each cage was observed on 1 d only. The levels of occurrence of a variety of behavioral states were estimated from 60 records of the behavior of each hen obtained over an 8-h interval. Head flicking was the most prevalent of its group of mutually exclusive behavioral states, followed by eating and preening. Cage pecking appeared stereotyped in many hens, but, at a frequency of 5% of observations, was not unusually prevalent. Bobbing was primarily a prelaying behavior indicative of the restlessness prior to oviposition typical of White Leghorn hens in cages. Hens were on their feet for more than 75% of the time of observation. Physical displacement of a hen by its cagemate was commonplace. Eating was negatively correlated with head flicking and preening. Walking and bobbing were positively correlated with physical displacement. Hens became less active with time in cages, possibly due to an age effect or to behavioral adaptation to the cage environment. A second trend in behavior over time may be related to changes in levels of egg production or feed consumption. Key words: Ethogram, behavior, laying hen, battery cage

scholarly journals Supplementation of spirulina (Spirulina platensis) on yolk colour, egg quality and production performance of laying hens

2018 ◽  
Vol 34 (2) ◽  
pp. 71-78
Author(s):  
M Ahammed ◽  
S Sharmin ◽  
A Khatun ◽  
KMS Islam
Keyword(s):  
Spirulina Platensis ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Dietary Supplementation ◽  
Egg Yolk ◽  
Production Performance ◽  
Dietary Treatments

A total of 96 Shaver 579 laying hens of 78 weeks of age were studied for the effects on egg production of dietary supplementation with spirulina (Spirulina platensis). The hens were divided into four dietary treatments with six replications of four birds in each group. Birds of three groups were supplemented with 0.1%, 0.2% and 0.3% spirulina and one group was kept as control. Yolk colour significantly improved (P<0.01) as compared to control, without affecting any other production performances. It is suggested that dietary supplementation of spirulina at 0.2 to 0.3% levels in aged laying hens enhanced egg yolk colour. Bangl. vet. 2017. Vol. 34, No. 2, 71-78

Body Weight and Egg Production Performance of Induced Moulted White Leghorn Layers

2006 ◽  
Vol 5 (10) ◽  
pp. 996-1000
Author(s):  
P. Thirunavukkarasu . ◽  
M. Moorthy . ◽  
K. Viswanathan .
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Production Performance ◽  
White Leghorn

scholarly journals Keel bone fractures are more prevalent in White Leghorn hens than in Red Jungle fowl hens—A pilot study

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0255234
Author(s):  
Käthe Elise Kittelsen ◽  
Pall Gretarsson ◽  
Per Jensen ◽  
Jens Peter Christensen ◽  
Ingrid Toftaker ◽  
...  
Keyword(s):  
Pilot Study ◽  
Egg Production ◽  
Laying Hens ◽  
Bone Fractures ◽  
Laying Hen ◽  
White Leghorn ◽  
Red Jungle Fowl ◽  
White Leghorns ◽  
Selection For

Fractures and deviations to the keel bone are common in commercial laying hens, with reported variations in occurrence across strains and breeds. The aetiology is not fully understood, however, modern genetics and selection for efficient egg production has been claimed to be important factors for the keel bone fractures. To explore this further, we investigated keel bones from two different breeds, representing different degrees of selection for egg production: Red jungle fowl (n = 82), and White Leghorn (n = 32), where the latter is a selected laying breed which is the origin for many modern laying hen hybrids. Keel bones from a total of 116 birds, 53 hens and 63 roosters, were examined by necropsy at 80 weeks of age. All birds were raised in modified aviaries in the same holding facility. Overall, 24.5% of the hens had one or more fractures to the keel, with a difference in the prevalence between hens from the two breeds (p<0.01): 10% (95% CI: 3.7–24%) in the Red Jungle fowl hens and 69% (95% CI: 37–90%) in the White Leghorn hens. No roosters, regardless of breed, had keel bone fractures. Mild to moderate keel bone deviations were present in 54% (95% CI: 25–80%) of the hens and 4.7% (95% CI: 0.5–30%) of the roosters, all White Leghorns.

scholarly journals Pequi peel meal in laying hen diet

2016 ◽  
Vol 38 (2) ◽  
pp. 151 ◽  
Author(s):  
Amanda Lapa Silva ◽  
Romênia Regina Pires Lage ◽  
Daniel Emygdio de Faria Filho ◽  
Izabela Lorena Azevedo ◽  
Adélio Nunes Dias ◽  
...  
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Egg Yolk ◽  
Laying Hen ◽  
The Other ◽  
Egg Mass ◽  
Feed Conversion ◽  
Randomized Design ◽  
Completely Randomized Design

This study evaluated the effect of pequi peel meal in the diet for laying hens on performance and egg quality. Hy-Line® Brown hens (n=160) aged 55 weeks with 1642±63g body weight were distributed in a completely randomized design with five treatments and four replications of eight birds each. The treatments consisted of isometric substitution of corn by pequi peel meal at 0, 2.5, 5.0, 7.5 and 10%. The performance and internal and external egg quality were evaluated. Egg production, egg mass and feed conversion worsened linearly with increasing replacement of corn with pequi peel meal, while the yolk color increased linearly. The other variables related to performance and internal and external egg quality were not significantly affected by the treatments. It can be concluded that the use of pequi peel meal replacing corn in laying hen diet does not change the internal and external egg quality, improves the pigmentation of egg yolk, and impairs performance of laying hens. 

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