Research with adult mammals has shown that the diet-induced thermogenesis (DIT) related to the oxidation of macronutrients has a negative feedback on feed intake (FI), depending on the nutrient considered: proteins are combusted first, then carbohydrates and finally fat, corresponding to their satiating ability. However, previous studies revealed no significant differences in DIT between broile...

In M33 cockerels, the rapid phase of testicular growth and the onset of sperm production were advanced either by increasing daylengths or an interrupted-night photoschedule; they were delayed by constant short days (8L). The results observed under constant long days (16L) were intermediate. In this strain, the cockerels maintained their mean testicular weight during the adult period while their...

The amount of RNA in the testis of immature cockerels has been shown to increase by the injection of pituitary gonadotropins1). The gonadotropic activity of the anterior pituitary of cockerels has been known to show a diurnal change starting at 5 weeks of age2). White Leghorn cockerels were housed in cages under 14hr light (5.00-19.00 hours) per day with food and water available continuously. F...

GEORGIEVA, V., S. CHOBANOVA, N. TODOROV and D. PAVLOV, 2014. Effect of dietary crude fiber on endogenous dry matter and nitrogen excretion in cockerels. Bulg. J. Agric. Sci. 20: 903-908 The experiments were carried out with 10 cecectomisеd cockerels for each diet. They are force fed by method of Sibbald (1986) with nitrogen free diets of pure nutrients and with sunflower meal with different cru...

The objective of this study was to fit growth curves using nonlinear and linear functions to describe the growth of ostriches in a Brazilian population. The data set consisted of 112 animals with BW measurements from hatching to 383 d of age. Two nonlinear growth functions (Gompertz and logistic) and a third-order polynomial function were applied. The parameters for the models were estimated us...

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 in cockerels i...

Feeding of bile acid binding polymeric organic bases inhibited cholesterol rise and aortic. plaque formation in cholesterol-fed cockerels, lowered plasma cholesterol concentrations in normocholesterolemic cockerels and dogs, and increased fecal bile acid and sterol output in a dog. In experiments lasting as long a~ one year these substances have not produced visible toxic effects. They are thou...

1. Infusions of histidine into the carotid arteries of cockerels receiving a histidine-limiting, imbalanced diet caused an increase in food intake, whereas similar infusions into the jugular veins did not. 2. Infusions of lysine into the carotid arteries or jugular veins of young cockerels receiving a balanced, low-protein diet caused decreases in food intake. There was evidence of a more marke...

Measurements were made on protein sup,plcments in.a basal diet, of dry matter, nitrogen and amino acid digestibilities using mature and' adult cockerels. Birds were killed 5h after receiving their diet in a single feed. Analyses were made on digesta from (i) the ileum, (ii) the terminal ileum, (iii) post caeca, and on excreta. In a second exDeriment -adult cockerels were fitted with a sitiple c...

Estrogens tend to lower the blood pressure of cockerels. Estrogen-treated cockerels and estro-gen-secreting hens are immune to the chronic pressor effects of desoxycorticosterone acetate (DCA) and cortisone. B OTH desoxycorticosterone acetate (DCA) and cortisone effect moderate hypertension in cockerels." 2 The present studies demonstrate that estrogen-treated cockerels and estrogen-secreting h...