Response of Broiler Breeder Females to Feed Restriction Below Recommended Levels.

Response of Broiler Chickens to Quantitative Feed Restriction with or without Ascorbic Acid Supplementation

Ascorbic acid (vitamin C) supplementation has been documented as a useful tool to improve the performance of laying birds reared under harsh environmental conditions. However, there is limited information on the use of ascorbic acid as a means of ameliorating the stressful conditions imposed by feed restriction. To this effect a 3 × 2 factorial experiment was carried out to evaluate the effect ...

Divergence of ovarian follicular growth response in broiler breeder hens provided twice the recommended amount of feed

s of papers 107 was added to PL at 10 and 20 mol% (PL10, PL20). PL10 enhanced fusion (82.4 ± 1.4 vs. 58.4 ± 3.0% sperm fused, PL10 vs. PL20, n = 7; P < 0.0001) and sperm viability (27 ± 2, 46 ± 3, and 39 ± 4%, respectively, for PL, PL10, and PL20, P < 0.05). Because viability was still unacceptably low, we then added poly-L-lysine to the PL10 recipe at 1 (PL10−1), 5 (PL10−5), and 10 mol% (PL10−...

The relationship of body composition, feed intake, and metabolic hormones for broiler breeder females.

Three hundred twenty Cobb 500 broiler breeder pullets at 21 wk of age were selected from a flock fed according to Cobb Breeder Management Guide specifications. One hundred sixty pullets at 21 wk of age were switched to ad libitum feeding, and the remaining 160 pullets continued to be control-fed. The pullets were photostimulated at 22 wk and maintained until 36.5 wk. Plasma samples were obtaine...

Effect of Feed Restriction on Performance and Immune Response of Two Commercial Broiler Strains

Feed restriction significantly alters lipogenic gene expression in broiler breeder chickens.

Broiler breeder pullets were divided into two groups at 21 wk of age. One group was given free access to feed (ad libitum) and the other fed a limited amount of feed (restricted). At 22 wk, all birds were photostimulated and maintained throughout an egg-laying cycle ending at 36 wk. Samples of liver and abdominal fat pad were collected just before photostimulation (prelight), after photostimula...