Effect of feed allowance during rearing and breeding on female broiler breeders. 1. Growth and carcass characteristics.

The influence of feed allowance on growth and carcass characteristics was investigated with female Indian River broiler breeders. Four feeding programs were imposed: FF, provided ad libitum access to feed throughout; FR, provided ad libitum access to feed from 0 to 18 wk of age and restricted thereafter; RF, provided ad libitum access to feed from 0 to 4 wk, restricted from 4 to 18 wk, and consumed feed ad libitum thereafter; RR, provided ad libitum access to feed from 0 to 4 wk of age and restricted thereafter. All birds received a starter diet (2,739 kcal ME/kg, 19.

Effect of kernel density on the apparent and true metabolizable energy value of corn for chickens.

Five samples of corn selected to vary widely in kernel density (test weight per unit volume) were assayed for AMEn with male broiler chickens at 4 wk of age by regression analysis of a multilevel assay and for TMEn with adult White Leghorn roosters. The kernel densities (kilograms per hectoliter), AMEn, and TMEn (kilocalories per gram of DM) values of the corn were, respectively, 72, 3.68, and 3.

Reproductive senescence in domestic fowl: effects on egg production, sequence length and inter-sequence pause length.

1. Age-related changes in egg production, oviposition sequence length and inter-sequence pause length were studied by analysis of oviposition records of 50 individually-caged broiler breeders from 24 to 62 weeks of age. 2.

Cholesterogenesis from propionate: facts and speculations.

Cholesterogenesis from [1-14C]acetate and [2-14C]propionate by the liver and adipose tissue has been studied in vitro. In all species tested including the rat, mouse, chicken, cow and pig, labelled propionate was recovered in cholesterol following the same trend as acetate, but at lower incorporation rates. Chicken liver was the most active in incorporating both substrates into cholesterol.

Rates of entry of alanine and glycerol and their contribution to glucose synthesis in fasted chickens.

Rates of entry of alanine and glycerol and their contribution to glucose synthesis were studied in 48-h fasted White Leghorn cockerels using primed constant intravenous infusions of L-[U-14C]alanine and [U-14C]glycerol. Entry rates of alanine and glycerol were 112 and 401 mumol/h per kg body weight, respectively. Of the total glucose irreversible loss (entry rate), 1.