Circulating levels of LH and androstenedione were measured in 4 groups of 30 cockerels from 3 to 26 weeks of age. Each group was submitted to a different programme of artificial lighting, either a long (16 h) photoperiod, a short (8 h) photoperiod, an increasing (8 h to 16 h) photoperiod or a night-interruption regimen. Measurements were also made of the numbers of spermatozoa ejaculated on a d...

This study was designed to examine the effects of intracerebroventricular (ICV) injection of ketanserin(5-HT2a receptor antagonist) and SB242084 (5-HT2c receptor antagonist) on harmaline induced feeding anddrinking response in 24-h food-deprived (FD24) broiler cockerels. At first, guide cannula was surgicallyimplanted in the right lateral ventricle of chickens. In experiment 1, birds were injec...

Chronic administration of estrogens parenterally inhibits coronary atherogenesis in cockerels fed a cholesterol-supplemented diet, although no such prophylactic effect was observed against aorta atherogenesis. This protection of the coronary vessels is associated with depression of the plasma total cholesterol-lipid phosphorus ratio toward normal levels consequent upon estrogen-induced hyperpho...

Eighty black Nera cockerel chicks were randomly alloted to four dietarey treatmants containing 0, 10, 20 and 30% kolanut husk meal (KHM) for twelve weeks. Significant differences (P<0.05) in feed intake, weight gain conversion ratio observed. Dietary inclusion of KHM depressed growth rate nutrition uilization cockerels birds. There linear reduction (P>0.05) nitrogen retention apparent cru...

Simunek J., Eva Hegerova, Jaroslava Klimeliova and Radka Zavadilova: Effect of Sulphadimidine on the Toxicity of Phenobarbital in Cockerels of Different Ages. Acta vet. Brno, 54,1985 : 183-187. Acute toxicity (LD50) of phenobarbital sodium salt administered intramuscularly alone and after premedication with sulphadimidine sodium salt (in i. m. doses of 0.2 gjkg body mass) given 15 or 120 minute...

• It has been suggested that emotional stresses may be involved in the rate of development of atherosclerosis, may act to precipitate an acute arterial occlusion in the presence of atherosclerotic vascular disease, or, in the case of muscular organs like the heart, may serve to enhance the rate of activity of the organ beyond the capacity of the vasculature to prevent acute ischemia, thereby tr...