Hatchability Studies

Feeding for Hatchability

The Effect of Broiler Breeder Strain and Parent Flock Age on Hatchability and Fertile Hatchability

The effect of genetic strain (Ross 308; Cobb 500) and parent flock age (Ross at 32 and 36 weeks; Cobb at 26 and 44 weeks of age) on hatchability, fertile hatchability, Egg Weight Loss (EWL) and egg break out analysis were examined. At each flock age, 300 eggs from each treatment group were incubated. Thirty eggs from each treatment group were labeled individually for the measurements of Egg Wei...

Studies on hatchability of Schistosoma japonicum eggs in several external environmental conditions.

Several factors influencing the hatching of Schistosorna japonicum eggs were reported by Miyagawa (1916), Faust and Meleney (1924), Magath and Mathieson (1946), Faust (1947), Maldonado and Matienzo (1948), Ingalls et al (1949) and Sugiura et al (1954), but there were only a few investigators who have dealt with the resistance of the eggs to various external environmental conditions. These probl...

Hatchability of chicken embryos following somite manipulation.

The avian embryo has been a classical model to study early development because the embryo is easily accessible for manipulation of embryonic cells and structures. The usefulness of the chicken embryo increased with the development of quail-chick transplantation techniques (1,2). The ability to transplant Japanese quail cells into a chicken embryo provides a method to trace the developmental fat...

Ecological and Social Factors Affecting Hatchability of Eggs

--Hatchability, defined as the proportion of eggs surviving to the end of incubation that hatch, varies among populations of birds. Here, I examine the effects of a variety of variables on hatchability in a comparative analysis of 155 studies of 113 species. Of the ecological nd geographical variables considered, latitude, diet, and nest type explain a significant amount of the variance in hatc...