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John D Hatle

Professor | Physiology

Biology | College of Arts & Sciences

Areas of Expertise

Teaching Responsibilities:  Physiology, Anatomy and Physiology 2, General Biology 3, 


Research Interests:  Effects of diet on lifespan in insects 


B.A. Luther College (1991)
Ph.D. University of Louisiana – Lafayette (1998)
Post-doc Illinois State University (1998-2003)


Physiology of aging and reproduction in insects

The regulation of lifespan is a basic question in biology, and understanding how aging occurs may have implications for health care. My lab studies the effects of diet on lifespan in grasshoppers. See my Research Web page for more information.


Terry Presidential Professor (2016-2019)


Grants and Contracts Awarded

NIH-R15 award to study longevity in grasshoppers. $435,000. 2016-2019 (no-cost extension to 2020). 

Publications & Presentations

(student co-authors underlined, corresponding author with *)

Heck MJ, Hatle JD*. (2018) Interaction of Neuropeptide F and diet levels effects carbonyl levels in grasshoppers. Experimental Gerontology.


Hatle JD*, Awan A, Nicholas J, Koch R, Vokrri JR, McCue MD, Williams CM, Davidowitz G, Hahn DA (2017) Life-extending dietary restriction and ovariectomy each increase leucine oxidation and alter leucine allocation in grasshoppers. Experimental Gerontology 96: 155-161.


Heck MJ1, Pehlivanovic M1, Purcell JU, Hahn DA, Hatle JD* (2016) Life-extending dietary restriction reduces oxidative damage of proteins in grasshoppers but does not alter allocation of ingested nitrogen to somatic tissues. J Gerontol A Biol Sci Med Sci. doi:10.1093/gerona/glw094. (1equal contribution)


Tetlak AG, Burnett JB, Hahn DA, Hatle JD* (2015) Vitellogenin RNAi and ovariectomy each increase lifespan, increase protein storage, and decrease feeding, but are not additive in grasshoppers. Biogerontology 16: 761-774.

Contact Information

Building 59, Room 3314

(904) 620-2778


Office Hours

by appointment