Dr. John D. Hatle Associate Professor B.A. Luther College, 1991 Ph.D. University of Louisiana – Lafayette, 1998 Post-doc Illinois State University, 1998-2003 Joined UNF faculty in 2003 Email: jhatle@unf.edu Research Homepage

RESEARCH: 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. Hence, I study the effects of reproduction on lifespan in grasshoppers and flesh flies. See Research Homepage for more details.

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

Hathaway M, Hatle JD, Li S, Ding X, Barry T, Hong F, Wood H, Borst D (2009) Characterization of hexamerin proteins and their mRNAs in the adult lubber grasshopper: the effects of nutrition and juvenile hormone on their levels. Comparative Biochemistry and Physiology A.

Hatle JD, Wells SM, Paterson C, Allen I, Fronstin RB, Fuller LE, Gordy LJ, Jawaid I, Lentz C, Melnyk S, Quattrochi J (2008) Reduced diet and reduced reproduction both increase lifespan in lubber grasshoppers, perhaps by independent mechanisms. 4th CPB Meeting in Africa: Mara 2008. “Molecules to migration: The pressures of life” (Ed S. Morris & A. Vosloo). Medimond Publishing Co, via Maserati 6/2, 40124 Bologna, Italy. Pgs 143-156.

Fronstin RB and Hatle JD (2008) Interpopulation variation in body mass after laying and age at oviposition, but not clutch mass, in eastern lubber grasshoppers. Journal of Orthoptera Research 17:273-277.

Hahn DA*, James L, Milne K and Hatle JD (2008). Life history plasticity after attaining a dietary threshold for reproduction in associated with protein storage in flesh flies. Functional Ecology 22:1081-1090.

Hatle JD*, Paterson CS, Jawaid I, Lentz C, Wells SM, Fronstin RB (2008) Protein accumulation underlying lifespan extension via ovariectomy in grasshoppers is consistent with the disposable soma hypothesis but is not due to dietary restriction. Experimental Gerontology 43:900-908.

Fronstin RB and Hatle JD* (2008) A cumulative feeding threshold required for vitellogenesis can be obviated with juvenile hormone treatment in lubber grasshoppers. Journal of Experimental Biology 211:79-85.

Hatle JD*, Wells S, Fuller LE, Allen IC, Gordy LJ, Melnyk S and Quattrochi J (2006) Calorie restriction and late-onset calorie restriction extend lifespan but do not alter protein storage in female grasshoppers. Mechanisms of Ageing and Development 127:883–891.

Hatle JD*, Waskey T Jr. and Juliano SA (2006) Plasticity of grasshopper vitellogenin production in response to diet is primarily a result of changes in fat body mass. Journal of Comparative Physiology B 176:27–34.