John Riesen

Professor (Emeritus)

Dr. John Riesen


   Phone: (860) 486-2541


   Office: George White Bldg., Room 001




  • PhD (Reproductive Physiology), University of Wisconsin, 1968
  • M.S. (Reproductive Physiology), University of Wisconsin, 1965
  • B.S. (Animal Science), University of Massachusetts, 1963


Area of Interest

The Sertoli Cell and Spermatogenesis: The Sertoli cell plays an important supporting and controlling role in the production of sperm cells. Compensatory hypertrophy/hyperplasia in unilaterally castrated animals has been used as a model system to study spermatogenesis and particularly the role of the Sertoli cell in this process.

The potential for the use of ultrasound for the early detection of mastitis in dairy cattle :  The use of ultrasound and quantitative analysis is being examined for its potential use in early  non-invasive detection of mastitis in cattle.

Use of Multimedia Backgrounder Computer Aided Instruction Modules in Improving Teaching: Instructors must deal with the disparity between the level at which they wish to teach and the level of the least-well-prepared students. This is most difficult in introductory courses, to which freshmen come from very different backgrounds. It is further aggravated in animal science where some students come from a farm background or vocational agricultural high schools and know agricultural vocabulary and concepts while others have never been exposed to these terms. Three multimedia computer aided instruction modules where developed in an effort to address this problem. These modules allow less well prepared students to obtain the prerequisite knowledge outside the classroom and allow the class as a whole to function at a more advanced level.


  • 2000 - 2001 recipient of the First Year Experience Teaching Award at UConn
  • 2000 - USDA Excellence in College and University Teaching Award
  • 1989 UCAHNRA Excellence in Teaching Faculty Award

Recent Publications

B.P. Enright, M. Taneja, D. Schreiber, J. Riesen, X.C. Tian, J.E. Fortune, and X. Yang. 2002. Reproductive Characteristics of Cloned Heifers Derived from Adult Somatic Cells. Biol Reprod 66:291-296.

Enright, B.P., M. Taneja, D. Schreiber, J. Riesen, X. Tian and X. Yang. 2001. Puberty and Early Follicular Dynamics in Adult Somatic Cell Derived Cloned Heifers. Theriogenology 55:267.

Lee, J.W., B.S. Jeong, J. Riesen, T. Hoagland and X. Yang. 2001. Fertilization and Embryonic Development Following Injection of Frozen-thawed Spermatozoon into in vitro Matured Porcine Oocyte. Theriogenology 55:506.

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Department of Animal Science
Unit 4040
17 Manter Road
Storrs, CT 06269-4040

Fall 2021 Hours and Contact
Main office open
Monday–Friday, 8am–5pm.

Tel: (860) 486-2413
Fax: (860) 486-4375