Dietary effects on selenite toxicity in the chick.

The toxicity of Na2SeO3 in diets containing torula (TY) or brewers' yeast (BY) compared to a corn-soy (CS) diet was investigated. Chick mortality caused by feeding 50 or 75 ppm Se as Na2SeO3 was significantly less with TY diets than with either BY or CS diets. The TY diet was also effective in reducing the depressing effect of Se on feed consumption and weight gain.

Dietary interaction between methylmercury, selenium, arsenic, and sulfur amino acids in Japanese quail.

Three experiments were conducted using Japanese quail to study the effect of arsenic (As) on the detoxifying role of selenium (Se) in methylmercury (Hg) toxicity and to test the possibility that arsenic could independently modify Hg toxicity. The possible role of sulfur-containing amino acids in Hg toxicity was also investigated. Methylmercuric chloride (10 ppm) had no significant effect on weight gain of the quail.

Toxicity of mercuric chloride in Japanese quail as affected by methods of incorporation into the diet.

Three experiments were conducted with day-old Japanese quail. When mercuric chloride (HgCl2) was added to the diet as a dry salt, it produced higher mortality than when added as a solution or as a casein-premix. Averages of mortality at 4 weeks were 86%, 55%, and 33% when 500 ppm mercury as HgCl2 was added dry, in 95% ethanol, or as a casein-premix, respectively.

A mutual protective effect of mercury and selenium in Japanese quail.

Dietary interactions between methylmercury (Ch3Hg) and sodium selenite (Na2SeO3) were studied in Japanese quail. Addition of 0.35-6 p.

Plasma LH progesterone concentrations in the turkey hen during the ovulatory cycle.

Progesterone and luteinizing hormone (LH) were measuured in the plasma of Large White turkey hens at frequent intervals during the ovulatory cycle and during the periods when ovulations did not occur. The hormones were quantitated at the beginning and the end of the reproductive season to follow the change in patterns and concentrations of these hormones. Radioimmunoassay procedures were used to assay both hormones.