An experiment was carried out to evaluate the performance of crossbred naked-neck and frizzle cockerel genotypes namely: (i) Na/naF/f, (ii) Na/naf/f (iii) na/naF/f and (iv) na/naf/f. These crossbred second generation cockerels were generated from a reciprocal crossing between crossbred heterozygous naked-neck (50% indigenous naked-neck and 50% Lohman Brown) and frizzle (50% indigenous frizzle a...

Abstract The use of modern chicken genotypes with high egg or meat performance results in the ethically unacceptable practice culling day-old male layer chicks because their inefficient fattening performance. Dual-purpose a balanced profile for both eggs and are one option to avoid this practice. In study, four crosses breed (White Rock New Hampshire) Bresse Gauloise were compared under conditi...

This study was designed to evaluate pharmacokinetics of sulphadimidine   in cockerels fed on subclinical dose of arsenic (100 ppm) in diet and to determine the protective efficacy following simultaneous dietary medication with Piper longum (pipli)   (100 ppm) in a 12-week feeding trial. Pharmacokinetic parameters were determined after single i.v. dose (50 mg/kg) of sulphadimidine ...

Estrogens are highly effective both prophylactieally and therapeutically against cholesterol-induced coronary atherogenesis in cockerels. The relative immunity of premenopausal women to coronary sclerosis may be related to the presence of these ovarian hormones. Therefore, estrogens may be useful in the treatment of human coronary atherosclerosis. With this object in mind, the elimination of th...

BACKGROUND Environmental tobacco smoke has been blamed for approximately 40,000 excess deaths from heart disease annually in the United States. As yet, no pathophysiological process that could be responsible for these deaths has been identified. Environmental tobacco smoke is composed mainly of aged and diluted sidestream smoke but also contains 15% to 20% exhaled mainstream smoke. Carcinogens,...

The plasma glucose-insulin relationships and thyroid status were investigated in two lines of adult cockerels divergently selected for high (R+) or low (R-) residual food consumption (RFC). For a given body weight, R+ birds had a 74% higher food intake than R- birds. Plasma glucose concentrations were significantly lower in the R+ line compared with the R- when fasted, whereas R+ birds exhibite...

Aim of study: To evaluate the effect different diets on carcass characteristics and meat quality from Mos free-ranged cockerel.Area Galicia (NW Spain).Material methods: Cockerels (n=75) were allocated to 3 groups (n=25) according finishing diets: commercial fodder (CF), 50% wheat corn (WH) 33% 66% (CR). Meat was assessed in terms physicochemical, nutritional features.Main results: The highest l...

These experiments were conducted to determine metabolizable energy and amino acid digestibilities of soybean meal, sunflower meal and canola meal in broiler chickens by using titanium oxide as indigestible marker in intact or caecectomized cockerels. Ileal and total tract digestibility of amino acids were measured using broiler chickens, moreover, digestibility were also determined in the intac...

The appearance of phosphoprotein in the plasma of male birds treated with estrogen has been reported by other investigators (1, 2). Earlier studies from this laboratory have indicated that this process reflects synthesis de novo of a protein fraction normally absent in cockerels and that the initial action of the hormone requires an intact ribonucleic acid-synthesizing system (3). In the presen...

Forty (40), thirteen weeks old cockerels were allocated to five dietary treatments after balancing for weight. The eight birds on each treatment replicated four times, such that two served as a replicate. In diet 1 (control) contain 0% Palm Kernel Cake (KPC) and Deoiled (DOC). Diet 2 3 continued 40% KPC, was presented in mash form while pellet. Diets 4 5 contained DOC, % Dietary had no effect (...