QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Hegsted, D. M. Articles by Stare, F. J. Search for Related Content PubMed Articles by Hegsted, D. M. Articles by Stare, F. J.

Nutritional Studies with the Duck

I. Purified Rations for the Duck^1,2,

Three Figures

Department of Nutrition, Harvard School of Public Health, and the Department of Biological Chemistry, Harvard Medical School, Boston

1. The duck is an extremely rapidly growing animal and on an adequate ration gains approximately 40 gm. a day during the first 3 weeks of life with an efficiency of food utilization of 50%.

2. Good growth, but somewhat less than optimum, occurs on purified diets containing only liver extract as the crude material. The factor in liver extract is similar or identical to the eluate factor or factors required by the chick. As in the chick, a deficiency results in an anemia.

3. The duck is similar to the chick in that additional amino acids above those supplied by 18% casein are required for good growth. Gelatin is superior to casein as a source of these amino acids.

4. Biotin is required by the duck. No symptoms other than very poor growth were noted in this deficiency.

² Supported in part by a grant-in-aid from the John and Mary R. Markle Foundation.

Manuscript received 24 March 1945.