The objective of this study was to determine the influence housing system on physical, morphological, and mechanical properties Japanese quail (Coturnix coturnix japonica) eggs. A total 240 eggs were collected from quails kept in two different systems: cage aviary (120 each system). Eggs significantly (P<0.05) heavier than (11.85 g vs. 10.93 g), also longer, wider had larger geometric mean diam...

Most laboratory studies of mate choice use affiliation as a surrogate measure for actual choice of a partner for copulation. In a series of recent studies using affiliation as a dependent variable, we showed that the tendency of both male and female Japanese quail to affiliate with members of the opposite sex is profoundly affected by seeing them mate with others: female quails show an increase...

Many animals have sensitivity to the e-vector of linearly polarised light, which may assist in visually mediated behaviours such as navigation, signalling and foraging. However, it is still controversial as to whether birds possess polarisation sensitivity. Several studies have found that altering the polarisation patterns of the broad visual field surrounding birds alters their intended migrat...

Cross-sectional study of quail eggs was conducted to evaluate the nutritional compositions of carbohydrate, fat, protein, calories, vitamin, minerals and sex hormones. The results showed that average of each whole quail egg weight was 10.67 g. Their contents of ash, carbohydrate, fat, protein and moisture were 1.06, 4.01, 9.89, 12.7 and 72.25 g 100g -1 , respectively. Total energy in calories o...

We performed four experiments to examine effects on the mate choices of female Japanese quail, Coturnix coturnix japonica, of observing a male mate with another female. Each experiment was conducted in three phases: (1) a pre-test during which subject females were allowed to choose between two males with which to affiliate; (2) an observation phase, in which subject females either watched or di...

The genetic diversity of domestic quail and two wild quail species, Japanese (Coturnix coturnix)and Common quail (Coturnix japonica), found in China was studied using microsatellite DNA markers. According to a comparison of the corresponding genetic indices in the three quail populations, such as Polymorphism Information Content (PIC), Mean Heterozygosity ( H ) and Fixation Index, wild Common q...