Summary The production system is one of the most significant factors influencing internal and external egg quality. Due to concerns for welfare laying hens, on basis Council Directive 1999/74/EC, EU countries banned conventional cages, so it necessary determine influence alternative systems quality traits table eggs. Consumers believe that organic eggs are healthier than from systems. In additi...

Drosophila larvae and adults possess a potent innate immune response, but the response of Drosophila eggs is poor. In contrast to Drosophila, eggs of the beetle Tribolium are protected by a serosa, an extraembryonic epithelium that is present in all insects except higher flies. In this study, we test a possible immune function of this frontier epithelium using Tc-zen1 RNAi-mediated deletion. Fi...

The role of selenium (Se) in human health and diseases has been discussed in detail in several recent reviews, with the main conclusion being that selenium deficiency is recognised as a global problem which urgently needs resolution. Since selenium content in plant-based food depends on its availability from soil, the level of this element in food and feeds varies among regions. In general, egg...

Double-yolked (DY) and single-yolked (SY) duck eggs (n = 1318 for both) were candled and weighed on Days (d) 2, 8, 12, 15, 19, 22 and 25 of incubation and yolk/embryo position was recorded on d2, d8 and at post-mortem. From d8 only eggs with live fertile yolk(s) remained in the incubator. On d2, 99.39% of yolks in DY eggs were in the adjacent position and by d8 yolk positions changed to paralle...

this study carried out for economic investigation on laying hen farms in tehran province. the data was collected through completion of questionnaire by direct interview from 41 layer farms, which were selected by stratified random sampling method in 2013. among all types of production functions, the cobb-douglas production function was selected and its coefficients was estimated and average pro...

A study was conducted to examine the effects of diets supplemented with organic selenium, (Se) and zinc, (Zn) on the performance of Cochin exotic breeder hens. Forty-two week old hens (n=120) and males (n=12) were assigned to four treatment groups of 10 females and 1 male each. Birds with no mineral supplementation (Group 1); feed supplemented with .33 ppm Se (Group 2) feed supplemented with 20...

Ethics Statement Production of specific pathogen–free eggs (VALO BioMedia GmbH, OsterholzScharmbeck, Germany) was performed in accordance with the guidelines of the European Pharmacopoeia (EP7.0.5.2.2.) and the US Department of Agriculture Veterinary Services (Memorandum 800.65). All procedures regarding embryonated chicken eggs were in accordance with the German Animal Protection Law. For infe...

Even though the laying hen industry in Kuwait is one of the most important animal industries, it covers only 55% of local egg consumption, and the remainder is imported resulting in increase in egg prices. In addition, a major problem that the egg industry is facing is the low quality of the eggshells, resulting in a large loss to the industry. Therefore, it is important to use a strain of layi...