William E. Berndtson, Ph.D.

William E. Berndtson, Ph.D.

Professor

Educational Background:

Ph.D., Cornell University, 1971

B.S., University of Connecticut, 1966

Current Teaching:

AAS 440 - Animal Breeding

ANSC 406 - Careers in Animal Science

ANSC 421 - Animal Agriculture Today

ANSC 511 - Anatomy & Physiology

ANSC 724/824 - Reproductive Management & Artificial Insemination

General Area of Interest and/or Specialty:

Male reproductive physiology; testicular development and factors influencing quantitative rates of spermatogenesis, artificial insemination of farm animals, and male reproductive risk assessment

Book Chapters:

  • Pickett, B.W. and W.E. Berndtson. Principles and Techniques of Freezing Spermatozoa. In: Physiology of Reproduction and Artificial Insemination of Cattle. Second Edition. G.W. Salsibury, N.L. VanDemark and J.R. Lodge (eds.), W.H. Freeman & Co., San Francisco. pp. 494-554. 1978.
  • Berndtson, W.E. and B.W. Pickett. Evaluation of Frozen Semen. In: Current Therapy in Theriogenology. D.A. Morrow (ed.). W.B. Saunders Co., Philadelphia. pp. 347-354. 1980.
  • Pickett, B.W. and W.E. Berndtson. Procedures for Handling Frozen Semen in the Field. In: Current Therapy in Theriogenology. D.A. Morrow (ed.). W.B. Saunders Co., Philadelphia. pp. 354-370. 1980.
  • Foote, R.H. and W.E. Berndtson. Reversibility in Male Reproductive Risk Assessment: The Germinal Cells. In: Male Reproductive Risk Assessment. A.R. Scialli and E.D. Clegg (eds.). CRC press, Inc., Boca Raton, Florida. pp 1-55. 1992.
  • Gondos, B. and W.E. Berndtson. Postnatal and prepubertal development. In: The Sertoli Cell. L.D. Russell and M.D. Griswold (eds.). Cache River Press. Clearwater, Florida. pp. 115-154. 1993.
  • Berndtson, W.E. Sperm Production and Its Harvest. In: Animal Andrology: Theories and Applications. P.J. Chenoweth and S.P. Lorton (eds.). CABI. (In Press).

Refereed Journal Publications:

  • Berndtson, W.E. and R.H. Foote. The survival of frozen bovine spermatozoa following minimum exposure to glycerol. Cryobiology 5:398-402. 1969.
  • Berndtson, W.E. and R.H. Foote. Components of bull semen responsible for tonicity-induced turbidity changes. J. Dairy Sci. 52:1299-1302. 1969.
  • Berndtson, W.E. and R.H. Foote. Bovine sperm cell volume at various intervals after addition of glycerol at 5C. Cryobiology 9:29-33. 1972.
  • Berndtson, W.E. and R.H. Foote. The freezability of spermatozoa after minimal pre-freezing exposure to glycerol or lactose. Cryobiology 9:57-60. 1972.
  • Berndtson, W.E. and R.H. Foote. Bull sperm survival following freezing in ampules, pellets and straws. VII. Inter. Cong. Animal Reprod. and Artif. Insem. II:1353-1356. 1972.
  • Berndtson, W.E. and C. Desjardins. The cycle of the seminiferous epithelium and spermatogenesis in the bovine testis. Am. J. Anat. 140:167-180. 1974.
  • Berndtson, W.E. and C. Desjardins. Circulating LH and FSH levels and testicular function in hamsters during light deprivation and subsequent photoperiodic stimulation. Endocrinology 99:195-205. 1974.
  • Berndtson, W.E., B.W. Pickett and T.M. Nett. Reproductive physiology of the stallion. IV. Seasonal changes in the testosterone concentration of peripheral plasma. J. Reprod. Fert. 39:115-118. 1974.
  • Berndtson, W.E., C. Desjardins and L.L. Ewing. Inhibition and maintenance of spermatogenesis in rats implanted with polydimethylsiloxane capsules containing various androgens. J. Endocr. 62:125-135. 1974.
  • Pickett, B.W. and W.E. Berndtson. The preservation of bovine spermatozoa by freezing in straws. A review. J. Dairy Sci. 57:1287-1301. 1974.
  • Rodriguez, O.L., W.E. Berndtson, B.D. Ennen and B.W. Pickett. Effect of rates of freezing and thawing and the level of glycerol on the survival of bovine spermatozoa in straws. J. Anim. Sci. 41:129-136. 1975.
  • Johnson, L., W.E. Berndtson and B.W. Pickett. An improved method for evaluating acrosomes of bovine spermatozoa. J. Anim. Sci. 42:951-954. 1976.
  • Pickett, B.W., L.C. Faulkner, G.E. Seidel, Jr., W.E. Berndtson and J.L. Voss. Reproductive physiology of the stallion. VI. Seminal and behavioral characteristics. J. Anim. Sci. 43:617-625. 1976.
  • Gebauer, M.R., B.W. Pickett, L.C. Faulkner, E.E. Remmenga and W.E. Berndtson. Reproductive physiology of the stallion. VII. Chemical characteristics of seminal plasma and spermatozoa. J. Anim. Sci. 43:626-632. 1976.
  • Ennen, B.D., W.E. Berndtson, R.G. Mortimer and B.W. Pickett. Effect of processing procedures on motility of bovine spermatozoa frozen in .25-ml straws. J. Anim. Sci. 43:651-656. 1976.
  • Mortimer, R.G., W.E. Berndtson, B.W. Pickett and L. Ball. Fertility of frozen bovine spermatozoa packaged in Continental straws or ampules. J. Dairy Sci. 59:1595-1598. 1976.
  • Berndtson, W.E. and R.H. Foote. Survival and fertility of antibiotic-treated bovine spermatozoa. J. Dairy Sci. 59:2130-2133. 1976.
  • Mortimer, R.G., W.E. Berndtson, B.D. Ennen and B.W. Pickett. Influence of glycerol level and freezing rate on post-thaw motility of bovine spermatozoa in Continental straws. J. Dairy Sci. 59:2134-2137. 1976.
  • Rugg, C.D., W.E. Berndtson, R.G. Mortimer and B.W. Pickett. Effect of thawing procedures on fertility of bovine spermatozoa frozen in .25-ml straws. J. Anim. Sci. 44:266-270. 1977.
  • Foote, R.H., G.E. Seidel, Jr., J. Hahn, W.E. Berndtson and G.H. Coulter. Seminal quality, spermatozoal output, and testicular changes in growing Holstein bulls. J. Dairy Sci. 60:85-88. 1977.
  • Amann, R.P., J.M. Bowen, B.W. Pickett, W.E. Berndtson, T.S. Stashak and J.L. Voss. Reproductive function of stallions treated with cambendazole. J.A.V.M.A. 170:730-732. 1977.
  • Thompson, D.L., Jr., B.W. Pickett, W.E. Berndtson, J.L. Voss and T.M. Nett. Reproductive physiology of the stallion. VIII. Artificial photoperiod, collection interval and seminal characteristics, sexual behavior and concentration of LH and testosterone in serum. J. Anim Sci. 44:656-664. 1977.
  • Berndtson, W.E. Methods for quantifying mammalian spermatogenesis: A review. J. Anim. Sci. 44:818-833. 1977.
  • Zarazua, M.V., W.E. Berndtson and B.W. Pickett. Influence of seminal dilution ratios and level of egg yolk during cooling and freezing of bovine spermatozoa in straws. J. Anim. Sci. 45:1368-1374. 1977.
  • Abbitt, B., G.E. Seidel, Jr. and W.E. Berndtson. Effect of tris (hydroxymethyl) aminomethane salt of prostaglandin F2 on post-thaw motility of bovine spermatozoa. J. Dairy Sci. 60:1991-1993. 1977.
  • Unal, M.B., W.E. Berndtson and B.W. Pickett. Influence of sugars in various combinations with glycerol on post-thaw motility of bovine spermatozoa in straws. J. Dairy Sci. 61:83-89. 1978.
  • Squires, E.L., R.P. Amann, B.W. Pickett, W.E. Berndtson, R.K. Shideler and J.L. Voss. Effect of fenbendazole on reproductive function in stallions. Theriogenology 9:447-455. 1978.
  • Pickett, B.W., W.E. Berndtson and J.J. Sullivan. Influence of seminal additives and packaging systems on fertility of frozen bovine spermatozoa. Proc. XIIth Biennial Symp. Anim. Reprod., J. Anim. Sci. 47 Suppl. II:12-47. 1978.
  • Smith, R.L., W.E. Berndtson, M.B. Unal and B.W. Pickett. Influence of percent egg yolk during cooling and freezing on survival of bovine spermatozoa. J. Dairy Sci. 62:1297-1303. 1979.
  • DeAbreu, W.E. Berndtson, R.L. Smith and B.W. Pickett. Effect of warming, after thawing, on viability of bovine spermatozoa thawed at different rates in French straws. J. Dairy Sci. 62:1449-1454. 1979.
  • Berndtson, W.E., P.J. Chenoweth, G.E. Seidel, Jr., B.W. Pickett and T.T. Olar. The influence of prostaglandin F2 on spermatogenesis, spermatozoal output, seminal quality, testosterone levels and libido of young beef bulls. J. Anim. Sci. 49:736-742. 1979.
  • Berndtson, W.E., J.H. Hoyer, E.L. Squires and B.W. Pickett. Influence of exogenous testosterone on spermatozoal production, seminal quality and libido of stallions. Proc. Second Inter. Symp. Equine Reprod., J. Reprod. Fert. Suppl. 27:19-23. 1979.
  • Berndtson, W.E., P.J. Chenoweth, T.T. Olar, B.W. Pickett and G.E. Seidel, Jr. Influence of albendazole on reproductive function of bulls. Am. J. Vet. Res. 41:640-644. 1980.
  • Berndtson, W.E., T.T. Olar and B.W. Pickett. Correlation between post-thaw motility and acrosomal integrity of bovine spermatozoa. J. Dairy Sci. 64:346-349. 1981.
  • Squires, E.L., W.E. Berndtson, J.H. Hoyer, B.W. Pickett and S.J.R. Wallach. Restoration of reproductive capacity of stallions after suppression with exogenous testosterone. J. Anim. Sci. 53:1351-1359. 1981.
  • Squires, E.L., D.E. McGlothlin, R.A. Bowen, W.E. Berndtson and B.W. Pickett. Use of antibiotics in stallion semen for the control of klebsiella pneumoniae and pseudomonas aeruginosa. Equine Vet. Sci., Mar/Apr pp. 43-48. 1981.
  • Squires, E.L., G.E. Todter, W.E. Berndtson and B.W. Pickett. Effect of anabolic steroids on reproductive function of young stallions. J. Anim. Sci. 54:576-582. 1982.
  • Berndtson, W.E., E.L. Squires and D.L. Thompson, Jr. Spermatogenesis, testicular composition and the concentration of testosterone in the equine testis as influenced by season. Theriogenology 20:449-457. 1983.
  • Abbitt, B., W.E. Berndtson and G.E. Seidel, Jr. Effect of dihydro-streptomycin sulfate or oxytetracycline on reproductive capacity of bulls. Am. J. Vet. Res. 43:2243-2246. 1984.
  • Dills, W.L., Jr., W.E. Berndtson, T.R. Covey and P.B. Kingsley-Hickman. Dietary potentiation of the anti-fertility effects of 5 thio-D-glucose in male rats. J. Nutr. 116:900-915. 1986.
  • Foote, R.H., W.E. Berndtson and T.R. Rounsaville. Use of quantitative testicular histology to assess the effect of dibromochloropropane (DBCP) on reproduction in rabbits. Fund. Appl. Toxic. 6:638-647. 1986.
  • Amann, R.P. and W.E. Berndtson. Assessment of procedures for screening agents for effects on male reproduction. Effects of dibromo-chloropropane (DBCP) on the rat. Fund. Appl. Toxic. 7:244-255. 1986.
  • Jones, L.S. and W.E. Berndtson. A quantitative study of Sertoli cell and germ cell populations as related to sexual development and aging in the stallion. Biol. Reprod. 35:138-148. 1986.
  • Berndtson, W.E., G. Igboeli and B.W. Pickett. Relationship of absolute numbers of Sertoli cells to testicular size and spermatogenesis in young beef bulls. J. Anim. Sci. 64:241-246. 1987.
  • Berndtson, W.E., G. Igboeli and W.G. Parker. The numbers of Sertoli cells in mature Holstein bulls and their relationship to quantitative aspects of spermatogenesis. Biol. Reprod. 37:60-67. 1987.
  • Berndtson, W.E. and G. Igboeli. Spermatogenesis, spermatozoal output and seminal quality of Holstein bulls electroejaculated after administration of exogenous oxytocin. J. Reprod. Fert. 82:467-475. 1988.
  • Berndtson, W.E. Sampling intensities and replication requirements for the detection of treatment effects on testicular function in bulls and stallions: A statistical assessment. J. Anim. Sci. 67:213-225. 1989.
  • Berndtson, W.E., C. Neefus, R.H. Foote and R.P. Amann. Optimal replication for histometric analyses of testicular function in rats or rabbits. Fund. Appl. Toxic. 12:291-302. 1989.
  • Berndtson, W.E. and L.S. Jones. Relationship of intratesticular testosterone content of stallions to age, spermatogenesis, Sertoli cell distribution and germ cell-Sertoli cell ratios. J. Reprod. Fert. 85:511-518. 1989.
  • Berndtson, W.E. and G. Igboeli. An examination of the numbers of Sertoli cells, quantitative rates of sperm production, and the efficiency of spermatogenesis in relation to the daily sperm output and seminal quality of young beef bulls. Amer. J. Vet. Res. 50:1193-1197. 1989.
  • Berndtson, W.E. Replication requirements and number of ejaculates needed for assessing treatment effects on sperm output and seminal characteristics of electroejaculated Holstein bulls. J. Anim. Sci. 68:709-718. 1990.
  • Berndtson, W.E. and T.L. Thompson. Age as a factor influencing the power and sensitivity of experiments for assessing body weight, testis size and spermatogenesis in rats. J. Andrology 11:325-335. 1990.
  • Berndtson, W.E. and T.L. Thompson. Changing relationships between testis size, Sertoli cell number and spermatogenesis in Sprague Dawley rats. J. Andrology 11:429-435. 1990.
  • Berndtson, W.E. A simple, rapid and reliable method for selecting or assessing the number of replicates for animal experiments. J. Anim. Sci. 69:67-76. 1991.
  • Berndtson, W.E. and E.D. Clegg. Developing improved strategies to determine male reproductive risk from environmental toxins. Theriogenology 38:223-237. 1992.
  • Thompson, T.L. and W.E. Berndtson. Testicular weight, Sertoli cell number, daily sperm production and sperm output of sexually-mature rabbits after neonatal or prepubertal hemicastration. Biol Reprod. 48:952-957. 1993.
  • Berndtson, W.E. and R.H. Foote. Disruption of spermatogenesis in rabbits consuming ethylene glycol monomethyl ether. Reprod. Toxicology 11:29-36. 1997.
  • Judd, J.E., W.E. Berndtson and A.C.S. Castro. Extragonadal sperm reserves, sperm-depletion rates, numbers of sperm per mating, and fertility with successive matings by intact or unilaterally vasectomized rats. J. Andrology 18:698-707. 1997.
  • Berndtson, W.E., J.E. Judd and A.C.S. Castro. Inherent variability among measures of fertility of rats and its implication in the design of mating trials. J. Andrology 18:717-724. 1997.
  • Landaeta-Hernandez, A.J., P.J. Chenoweth and W.E. Berndtson. Assessing sex drive in young Bos taurus bulls. Anim. Reprod. Sci. 66:151-160. 2001.
  • Castro, A.C.S., W.E. Berndtson and F.M. Cardosa. Plasma and testicular testosterone levels, volume density and number of Leydig cells and spermatogenic efficiency of rabbits. Braz. J. Med. Biol. Res. 35:493-498. 2002.
  • Berndtson, W.E. Comparative reliability and sensitivity of different methods for assessing treatment effects on sperm production. Anim. Reprod. Sci. 105:5-22.2008.
  • Berndtson, W.E. Replication needed to distinguish alterations in cell ratios, the frequency of individual stages of the cycle of the seminiferous epithelium, or the appearance of abnormalities in the testes of rodents, rabbits or humans. J. Andrology 31:593-606. 2010.
  • Berndtson, W.E. Replication needed to detect alterations in the composition of rodent, rabbit or human testes via volume density approaches. J. Andrology 31:607-616. 2010.
  • Berndtson, W.E. The importance and validity of technical assumptions required for quantifying sperm production rates: A review. J. Andrology 32:2-14. 2011.
Bill Berndtson
Keener Dairy Research Building, Room 102C
Durham, NH 03824
Phone: 
603-862-2553