Background: This study was conducted to investigate the effects of natural and synthetic sources lycopene on performance, egg quality some blood characteristics Japanese quail layers. Methods: The 252 eight-week-old hens were randomly divided into seven treatments with three replication. first treatment fed basal diet (control). Second third given diets containing tomato fruit powder (TOM) at a...

Appreciated for their versatile nutritive value and functional properties, eggs are considered as an important item in human diet. Eggs are one of the most common foods available worldwide as they play an important role in human diet by providing humans with protein, lipids, minerals and vitamins in an adequate amount. Chicken breeds differ in physical and biochemical contents in terms of eggs ...

The objective of the present study was to evaluate the probiotic effects of different concentrations of four selected native Lactobacillus strains on laying performance and egg quality parameters of quails. To do this, a six-week farm trial was performed in completely randomized design with seven different probiotic treatments of four replicates each consisting of eight quails, resulti...

Phenotypic plasticity and phenotypic stability are major components of the adaptive evolution of organisms to environmental variation. The invariant two-egg clutch size of Eudyptes penguins has recently been proposed to be a unique example of a maladaptive phenotypic stability, while their egg mass is a plastic trait. We tested whether this phenotypic plasticity during reproduction might result...

This study was conducted to examine the effect of feeding genetically modified organisms (GMO) compared with non - GMO diet on performance layers in terms egg production, broken rate and quality laying hen. One hundred ninety-two Hy-line brown hens were used for four weeks. All birds randomly assigned into two dietary treatments groups, each eight replicates (12 hens/ replicate). Significant di...

Carbon and nitrogen stable isotope (δ(13)C and δ(15)N) analysis has been used to elucidate foraging and migration behaviours of endangered sea turtle populations. Isotopic analysis of tissue samples from nesting females can provide information about their foraging locations before reproduction. To determine whether loggerhead (Caretta caretta) eggs provide a good proxy for maternal isotope valu...

The effect of long-term genetic selection on physical quality and composition of eggs was determined by analyzing eggs acquired from Agriculture Canada: Ottawa Control Strain 5 (CS5) from a 1950 base population, 7 (CS7) from a 1958 population and 10 (CS10) from a 1972 population. Eggs from the H&N “Nick Chick” current commercial strain (CCS) were also included. Eggs were collected monthly over ...