Effect of incubation temperature on the Grosspathology of chickens Embryos

Abstract

Ross parents stock eggs were incubated at 35.7c, 36.7c, 37.7c and 38.7c. The age of embryos mortality, the incidence of morphological abnormalities were recorded from all unhatched eggs. Eggs incubated at 35.7c and 36.7c hatched later than eggs incubated at 37.7c. Eggs incubated at 38.7c hatched earlier than eggs incubated at 37.7c. Lowheated eggs were characterized by a high incidence of small embryos with excess albumen ruptured yolk sacs, eyes closed and anabsorbed yolk sacs. Overheated and were characterized with head in small end, with large albumen, ruptured yolk sacs, oedematous and offensive odour. The percentage for these changes recorded for each treatment.