Variation in egg size and shape of the Hooded Crow Corvus corone cornix was investigated in the National Park “Ujœcie Warty”, western Poland, in 2000 and 2001. Mean clutch size was 4.55±0.79 (n=40). Coefficients of variation for clutch means ranged from 2.00±1.16 (breadth) to 3.35±1.76 (elongation index). Mean repeatability estimates were 0.69, 0.71, 0.73, and 0.62 for length, breadth, volume, ...

Egg storage longer than 7 d is associated with a delay in hatch time and a decline in hatchability and chick quality. Prestorage incubation is suggested as a method to reduce the negative effects of prolonged storage times by altering the developmental stage of the embryo, but earlier research has shown that prestorage incubation can both be detrimental and beneficial for hatchability. The reas...

The present study aimed to determine the effects of different storage materials and storage period on some hatchability traits of Japanese quail (Coturnix coturnix japonica) eggs. A total of 32 male and 102 female quail (twelve weeks of ages) were housed in multiple-bird cages. Eggs laid were divided into three groups with respect to the period of storage (I = 1, 2 and 3 days, II = 6, 7 and 8 d...

The purpose of this research was to examine the impact storing table hen eggs in egg cardboard viol, plastic box and viols at various temperatures on qualities. A total 300 chicken were used study. randomly distributed into three groups: standard viol. stored room temperature refrigerator for 28 days. On 0, 7, 14, 21, days experiment, ten from each group analyzed weight loss, shell strength, Ha...