three experiments were conducted to evaluate the nutritional value of bitter vetch. experiment 1 was conducted to determine the metabolisable energy content of bitter vetch. sixteen adult leghorn roosters were used. forty grams of bitter vetch were precision-fed individually to 12 roosters. in addition, 4 birds were not fed and served as a control treatment in the measurement of metabolic fecal...

An experiment was conducted to evaluate the potential dietary interaction between 1,4-diaminobutane (putrescine) and calcium on eggshell quality and overall laying performance. One hundred ninety-two 30-wk-old White Leghorn hens were fed a corn-and soybean-meal-based diet supplemented with 0.00, 0.05, 0.10, or 0.15% putrescine and 2.5, 3.0, 3.5, or 4.0% calcium in a factorial design (12 birds p...

Hens (White Leghorn) were immunized with different protein antigens and antibodies were isolated from eggs by PEG precipitation. To determine experimental conditions under which optimal antibody titers are reached the antigen dose and the mode of application were varied. Injecting the antigen three times every four weeks in the absence of adjuvant led to a phase like immune response. A plateau ...

A previous experiment showed that blue light (as a component of white light) protected against low temporal frequency dependent eye growth. This experiment investigated the role of temporal contrast. White leghorn chicks were exposed to white (with blue) or yellow (without blue) LED lighting modulated at either low (0.2Hz) or high (10Hz) temporal frequencies. Four cone contrast conditions were ...

JL HE Gentleman, who forms the subject of the following paper, was a public character of distinction, and a Member of the British Legislature. He was accompanied to the Continent by a medical gentleman of great talents, and both the physician and patient were well aware of the nature of the disease they had to combat. It was evidently aneurism, or some great organic derangement of the heart; bu...

The present study evaluated supplementation of zinc from different sources during chicken semen cryopreservation on post-thaw quality and fertility. Adult White Leghorn was cryopreserved using 4% dimethyl sulfoxide (DMSO) in Sasaki diluent (SD). In the cryomixture oxide (6.25 12.5 µM) sulphate (100 200 added cryopreserved. plastic straws were thawed at 5°C for 100 sec samples sperm motility, li...

Melatonin (MLT) has a significant role in mammalian reproduction, with little or no effect in birds. In the present study we studied the role of MLT in regulation of luteinizing hormone (LH) secretion in castrated White Leghorn (WL) roosters. In Experiment 1, castrated WL roosters (n = 30) were divided into three groups, and each group (n = 10) was subdivided into two subgroups (n = 5). Birds i...

s of papers 89 feed, warmth and potential negative social interaction are potential factors that could affect mortality immediately after hatch. The post-hatch body weight at time of mortality used as a risk factor indicated that the divergently selected lines have about the same risk and less sensitive to reduced body weight compared to the control population. Through survival analysis, this s...