Larry S. Katz

Professor
Bartlett 205
Phone: 848-932-3591
Fax: 732-932-6633
Email: lskatz@njaes.rutgers.edu
http://njaes.rutgers.edu/extension

Curriculum Vitae


Research

My lab studies the endocrine basis of sexual behavior in ruminants. My training in animal science, animal behavior and reproductive physiology assists me in blending these disciplines into a novel field of investigation. We are particularly interested in understanding sexual motivation and performance in males and attractivity, proceptivity, and receptivity in females. Recent studies have examined androgen-dependent olfactory signals emitted by males that females use to choose among the males. Currently we are assessing the self-stimulatory effects of male urine-marking on reproductive physiology and behavior in goats.

Some of my significant contributions to the field of domestic animal behavioral endocrinology include:

  • characterization of physical and social factors that influence tests designed for quantifying sexual performance or sex drive in domestic ruminants
  • standardization of sexual performance tests in domestic ruminants
  • demonstration of the importance of early rearing and sexual experiences on adult sexual performance in domestic ruminants
  • development of behavioral tests designed to discriminate motivational components from physical components in the quantification of sexual performance in domestic ruminants
  • demonstration of the relationship between photoperiod, prolactin concentrations and the behavioral response to estradiol in female goats
  • demonstration of the existence of an olfactory cue that stimulates enhanced sexual performance in male sheep
  • demonstration of a role for the vomeronasal organ in neonatal offspring recognition in sheep
  • demonstration of the importance of testosterone and not sexual experience in the development of a preference for females in male goats
  • demonstration that female goats prefer males and/or male odor; and this preference depends upon high serum concentrations of testosterone in the males

Specific Projects

We are currently exploring sexual selection in goats, with emphasis on female choice. We have shown that females in estrus prefer males and their odors if the males have high concentrations of serum testosterone. We are attempting to identify putative pheromones in male urine; and whether estrus females make the discrimination among males using ordinary or accessory olfactory systems.

Experience

Title Location Year
Professor Dept. of Animal Sciences, Rutgers University 2009
Director, Cooperative Extension and Senior Associate Director, NJ Agricultural Experiment Station Dept. of Animal Sciences, Rutgers University 2008 - present
Department Chair Dept. of Animal Sciences, Rutgers University 2002 - 2008
Acting Department Chair Dept. of Animal Sciences, Rutgers University 2001 - 2002
Associate Professor Dept. of Animal Sciences, Rutgers University 1995
Assistant Professor Dept. of Animal Sciences, Rutgers University 1989
Research Physiologist University of California at Berkeley
1987
Post-Graduate Researcher VI University of California at Davis 1985

Education

Degree Location Year
NIH Post-Doctoral Training Fellowship Colorado State University, Fort Collins 1984
Ph.D. Animal Behavior, University of California at Davis 1984
M.S. Reproductive Physiology, Cornell University 1979
B.S. Animal Science, Cornell University 1976

Current Research Faculty and Graduate Students

Susan E. Becker Research Assistant Reproductive physiology of white-tailed deer

Publications