THE CONCLUSIONS WHICH WE DERIVE FROM OUR OBSERVATIONS ARE AS FOLLOWS: 1. The excretion of injected, egg-albumen as such is in no case complete. The quantity retained varies from 23 to 100%. 2. The amount retained varies: a) directly with the slowness of absorption. This is determined by the manner of administration. b) directly with the time during which the proteid remains in the body; and the...

Storage of hatching eggs for a period prior to incubation is unavoidable. Extended storage periods do affects egg quality, chick development and hatchability. There are variations in responses from different strains chickens. Transylvanian naked neck chicken were stored at 16±1.5℃ either 0, 3, 6, 9, 12, 15 or 18d. Forty-four each batch set after quality determination with 6 per batch. Egg weigh...

The quality of eggs laid by 2 hybrid and 2 Italian dual-purpose genotypes of hens reared under organic farming system was studied. Hens belonging to Hy-Line Brown (brown eggshell, HLB), Hy-Line White (white eggshell, HLW), Ermellinata di Rovigo (brown eggshell, E), and Robusta maculata (brown eggshell, R) genotypes were reared from 24 to 43 wk of age. The trial was carried out from July to Dece...

Normal chick embryos swallow and utilize the albumen in the egg between the 11th and 15th day of incubation (Witschi, 1949). They use approximately two-thirds of the yolk by the end of incubation (Romanoff & Romanoff, 1949). Thus the embryo has access to 4 g of protein in the albumen and 3 g of protein in the yolk (Romanoff & Romanoff, 1949). Embryos which have been hypophysectomized by partial...

avian leukosis viruses (alvs) cause different types of tumours in poultry and can affect the health and egg production of the birds. to investigate the presence of the virus in chicken layer flocks in shiraz, 222 egg albumen from local layer breeder (25 eggs), local layer grand parent (30 eggs), broiler breeder (60 eggs), commercial layer (46 eggs) and broiler grand parent (61 eggs) were tested...

The aim of the study was to evaluate effects on exterior and interior egg quality and sensory characteristics of eggs from hens fed diets with admixtures of 3.5 or 7.0% of mussel meal or 20% wheat-distillers dried grains with solubles (DDGS). The mussel meal diets followed organic standards, whereas the DDGS diet was formulated for hens in conventional production. Standard diets, one organic an...

This study was conducted to evaluate the effects of phytogenic additive and antibiotic growth promoter in laying Japanese quails. One hundred and sixty five quails were divided into three groups of 5 replicates and 11 quails (8 females and 3 males) in each replicate. Treatment 1 was fed control diet, treatment 2 was fed control diet supplemented with 0.05% bacitracin methylene disalicylate as a...

Currently, the production of eggs in alternative systems has been increasing, but there is no information regarding its quality criteria. Aiming to analyze physical and chemical characteristics organic eggs, associated with advancing age laying, egg weight, albumen height, shell thickness, yolk index percentage, percentage Haugh Unit (HU) evaluated. Every two weeks, six fresh were evaluated, du...

Seventy Brown-Nick laying hens (39-wk old) were divided into 5 treatment groups of similar mean body weight and egg production, comprising 14 birds in each. The housed individual cages a completely randomized design 16:8 h light:dark photoperiod was employed. fed standard layer diets containing different levels lutein for 6 weeks. Treatment included control (without lutein), 100, 200, 400 800 p...