![]() ![]() ![]() In addition, for all treatments, surface temperature on the head was higher than of the other body regions. #Chicken incubator temperature skinOn the other hand, HT hatchlings had decreased skin thickness and increased vascularity, and preferred a higher ambient temperature compared to CK and HT hatchlings. LT hatchlings showed lower plasma T3 and GH, as well as lower T3/T4 ratio and decreased vascularity in the neck, back, and thigh skin compared to CK hatchlings. No differences were found among treatments for body weight, total feather weight, number and length of barbs, barbule length, and plasma T4 concentration. HT hatchlings had higher surface temperature on the head, neck, and back, and thinner and more vascularized skin than did CK and LT hatchlings. The difference between eggshell and incubator air temperature diminished with the increasing incubation temperature, and was approximately zero for HT. During this period, eggshell temperature of HT eggs (38.8☐.33☌) was higher than of LT (37.4☐.08☌) and CK eggs (37.8 ☐.15☌). Broiler breeder eggs were exposed to low (36☌), control (37.5☌), or high (39☌) temperatures (treatments LT, CK, and HT, respectively) from day 13 of incubation onward, because it is known that the endocrine axes are already established at this time. However, no study to date has assessed the influence of incubation temperature during the fetal stage on morphometric characteristics and vascular development of the skin, feather characteristics, and their relationship to hormone levels and preferred temperature in later life in chickens. Skin and feather characteristics, which play a critical role in body temperature maintenance, can be affected by incubation circumstances, such as incubation temperature. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |