An experiment was conducted to evaluate a breeder diet containing a yeast culture as a means of improving the reproductive performance of two genetically dissimilar lines of turkey hens (designated as L and H). Two hundred hens of lines L and H, 100 hens per line, were housed in a curtain sided breeder house (10 hens/line/pen). Starting at 31 weeks of age (WOA), the hens were fed either Corn-soy (CS) or Corn soy+yeast (CS+Y,.5% Diamond V Mills "XP" yeast culture, Saccharomyces cerevisiae) diets. Between 33 and 45 WOA, the hens were mated inter se and from 45 to 51 WOA reciprocal line matings were established. Hen reproductive parameters measured between 31 and 51 WOA were, body weight (BW) change, feed intake, feed per dozen eggs, egg production, egg size, fertility, embryonic mortality, and hatchability of fertilized eggs from 7 biweekly egg settings. No differences (P>.05) were observed with yeast culture supplementation of the diet for changes in BW, egg production, egg weight, embryonic mortality, and hatchability of fertilized eggs (n= 5 biweekly hatches) of either line. A significant time by diet interaction was evident only in feed intake. There was an improved (P<.05) hen fertility in line H as a result of feeding the dietary yeast culture. When reciprocal line crosses were established between 46 and 51 WOA, hatch of fertilized eggs (n= 2 biweekly hatches) was substantially improved (p<.05) from hens fed the yeast culture containing diet. The results of this study suggest that there is a genetic factor associated with the feeding of a diet containing a yeast culture to turkey breeder hens. / Graduation date: 1993

No description available.

This study evaluated the effects of three light sources (sodium vapor, daylight fluorescent, and incandescent) on growth and reproduction in turkeys, and the influence of the opposite sex on reproduction when using these three light sources. The influence of the various treatments as potential stressors was also evaluated. Ninety male and 324 female Large White turkeys were reared in single-sex pens under one of the three previously mentioned light sources from 8 to 22 weeks of age. All males and females were placed under lights restricted to 6 hours (h) of light per day at an intensity of 21.6 lux when they were 22 weeks of age. At 33 weeks of age, males were exposed to 16 h of light per day under the same light sources under which they were reared at intensities of either 21.6 or 86.1 lux. At 35 weeks of age, females were reassigned to the various light sources to achieve all possible combinations of adolescent and breeder light source. Light was provided 16 hours per day at an intensity of 53.8 lux during a 20 week egg production cycle. Within this design, females were housed in either (a) pens with a male physically present, (b) pens with a male visually and vocally present, or (c) pens completely isolated from males. / Master of Science

Call number: LD2668 .T4 1963 B36 / Master of Science

Call number: LD2668 .T4 1964 T24 / Master of Science

Digitized by Kansas Correctional Industries

No description available.

No description available.

Graduation date: 1996

This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.