this experiment was carried out to investigate the effects of in yolk-sac administration of olive oil (0 and 0.7 ml) on productive performance and breast development of broiler chickens exposed to post-hatch fasting stress (0, 12, 24, 36 and 48 hours). a total number of 800, 1-day-old broiler chicks in a completely randomized block design with 10 treatments and 4 replicates were used. live body...

four hundred and eighty mixed-sex broiler chicks aged 3 hrs after hatching were allotted according to a completely random design in a 6 × 2 × 2 factorial schedule into 2 groups of 12 replications of 20 chicks each. the main experimental factors were fasting for 0, 6, 12, 24, 36, and 48 hrs after chick placement, calcium gluconate (ca-glu) injection (0 and 0.6 ml) and sex (male and female). inde...

The small intestines of hatching chicks undergo rapid developmental changes in the immediate post-hatch period when the birds are making the transition from endogenous nutrient supply from yolk to dependence on exogenous feed. This transition usually only begins 48 h or more after hatching, owing to logistical considerations of production. The effects of fasting for 48 h at different times duri...

This study determined the availability of glycerol as indicator of energy status of broiler chicks during hatch, and the behavior of chicks subjected to three fasting times with reference to production standards. Chicks originating from 31 and 54 week-old Ross breeder flocks were utilized. Samples of liver were taken from chicks during the following time periods: pipping of eggshell, wet hatch,...

BACKGROUND Broiler chickens are compulsive feeders that become obese as juveniles and are thus a unique model for metabolic disorders in humans. However, little is known about the relationship between dietary composition, fasting and refeeding and adipose tissue physiology in chicks. Our objective was to determine how dietary macronutrient composition and fasting and refeeding affect chick adip...

An experiment was conducted to study the effect of post-hatch feed deprivation on yolk sac utilization and subsequent performance of young broiler chickens (280) up to 35 days of age. The experimental treatments included access to feed at 8 h intervals after hatch, up to 48 h (0, 8, 16, 24, 32, 40 or 48 h). Water was offered ad libitum to all the groups immediately after placement. Results indi...

Anopheles gambiae eggs generally hatch at the completion of embryo development; two-three days post oviposition. However, staggered or delayed hatching has been observed whereby a single batch of eggs shows marked variation in time-to-hatch, with some eggs hatching 18 days post oviposition or later. The mechanism enabling delayed hatch has not been clearly elucidated but is likely mediated by e...