Effect of Age and Body Weight on the Systolic Blood Pressure of the Growing Chicken

The Relationships of Blood Pressure, Heart Rate and Body Weight to Aging in the Domestic Fowl

“…Males were shown to increase 14 percent and females increased by 24 percent. Nichols et al (1963) determined the relationship between systolic blood pressure and body weight in cockerels and determined that blood pressure increased 2.02 mm. These investigators determined that a divergence of pressures began when the chicks were 8 to 13 weeks of age and depended primarily upon an increase in male systolic blood pressure.…”

Physiological responses of cockerels to dietary protein and energy restriction

“…Although blood pressure was lower for restricted energy and restricted protein diets in experiment I, most of this difference was probably related to the light body weights of the birds fed the restricted diets. Nichols et al (1963a) found that sys tolic blood pressure increased 8.64 mm Hg per kilogram of increase in body weight for cockerels between 8 and 14 weeks of age.…”