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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A systematic procedure for estimating bull fertility from non-return data

Huston, Keith Arthur, January 1951 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1951. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Bibliography: leaves 50-58.
2

Accuracy of predicting genetic merit of A.I. sampled bulls for final score from pedigree information /

Rohl, James, January 1994 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 62-65). Also available via the Internet.
3

Studies on the social and sexual behaviour of bulls /

Blockey, M. January 1975 (has links)
Thesis (Ph.D.)--University of Melbourne, 1976. / Typescript (photocopy). Includes bibliographical references (leaves 219-230). Also available via the Internet.
4

A study of performance of A.I. proved bulls in owner-sampler herds

Gramling, George Elmer, January 1967 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1967. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
5

The clinical use of an electroejaculator in fertility examinations of the male bovine

Hay, William Harold. January 1955 (has links)
Call number: LD2668 .T4 1955 H41 / Master of Science
6

Fertility associated antigen in peripubertal beef bulls as an indicator of potential fertility

Gallino, Joanna Lynn 01 November 2005 (has links)
Ejaculates from peripubertal Angus (n=106), Brahman (n=156) and Brangus (n=212) bulls were evaluated for the presence of a 31 kDa protein known as fertility associated antigen (FAA) using the ReproTest for Bulls (ReproTech, Tucson, AZ). This study was designed to test the repeatability of FAA detection using the chute-side cassette and to quantify the relationship of age, scrotal circumference, sperm motility, ejaculate volume and sperm concentration with the presence of FAA in ejaculates from peripubertal bulls. A total of 776 ejaculates were collected, and 77% (n=598) were classified as FAA+. Three ejaculates were obtained from 133 bulls (Angus, n=33; Brahman, n=100) on d 0, 30 and 60. Brahman bulls were older (p<0.0001) at puberty than Angus bulls. Ejaculate volume was the only trait that differed between bulls that were classified as FAA+ and FAA? at first collection. Mean ejaculate volume was greater (p<0.0001) for FAA? than for FAA+ ejaculates. Serial ejaculates were profiled according to one of four FAA classification patterns (0 = three FAA? ejaculates; 1 = three FAA+ ejaculates; 2 = first ejaculate FAA?; and 3 = first ejaculate FAA+). A majority of the bulls were FAA+ on all three ejaculates (57%) or at least on the first ejaculate (25%). Seven bulls (5%) were consistently FAA?, while the remaining bulls (12%) were FAA? on the first ejaculate. There were no differences in scrotal circumference or sperm concentration among FAA profiles. FAA profile-3 bulls were older (p<0.05) than FAA profile-1 bulls at 2nd collection. Sperm motility was greater (p<0.05) for FAA profile-1 than for FAA profile-3 bulls at 1st collection. Ejaculate volume was greater (p<0.05) in FAA profile-0 Angus bulls than for FAA profile-1 at 1st collection and in FAA profile-0 Brahman bulls than FAA profile-2 at 2nd collection. These data indicate that FAA classification was not affected by sperm motility, sperm concentration or scrotal circumference in peripubertal bulls. Repeatability of FAA classification was higher for bulls that were FAA+ at first ejaculation. Thus, peripubertal FAA? bulls should be re-evaluated to increase FAA-classification accuracy for identification of higher fertility as well as lower fertility animals prior to breeding.
7

Development of culture methods for spermatogonial stem cells and ectopic testicular xenografting in the bull

Oatley, Jon Michael, January 2004 (has links) (PDF)
Thesis (Ph. D.)--Washington State University. / Includes bibliographical references.
8

The Range Bull

Pickrell, Charles U. 06 1900 (has links)
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.
9

Prevalence of Trichomoniasis in Alabama beef bulls

Rodning, Soren Piers, January 2006 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references.
10

Feeding behaviors and performance measurements in bucks, rams, and bulls

Chavez, Stephen John. January 2008 (has links)
Thesis (M.S.)--West Virginia University, 2008. / Title from document title page. Document formatted into pages; contains vii, 91 p. : ill. (some col.). Includes abstract. Includes bibliographical references.

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