John Hatle

John Hatle
John Hatle
Country	United States
Organizations:	University of North Florida, Department of Biology at the University of North Florida
Titles:	Professor of Biology
Focal areas:
	Biology; Education; Nutrition; Physiology;
Focal species:
	Eastern lubber grasshopper (Romalea microptera);
LinkedIn:	https://www.linkedin.com/in/john-hatle-76402017/
Twitter:	https://twitter.com/JohnHatle

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Hatle, J.D., Maslikova, V., Short, C.A., Bracey, D., Darmanjian, M., Morningstar, S., Reams, B., Mashanov, V.S., Jahan-Mihan, A., Hahn, D.A., 2022. Protein storage and reproduction increase in grasshoppers on a diet matched to the amino acids of egg yolk protein. Journal of Experimental Biology 225:1–13. https://doi.org/10.1242/jeb.244450
Hatle, J.D., Awan, A., Nicholas, J., Koch, R., Vokrri, J.R., McCue, M.D., Williams, C.M., Davidowitz, G., Hahn, D.A., 2017. Life-extending dietary restriction and ovariectomy each increase leucine oxidation and alter leucine allocation in grasshoppers. Experimental Gerontology 96:155–161. https://doi.org/10.1016/j.exger.2017.06.019
Heck, M.J., Pehlivanovic, M., Purcell, J.U., Hahn, D.A., Hatle, J.D., 2017. Life-extending dietary restriction reduces oxidative damage of proteins in grasshoppers but does not alter allocation of ingested nitrogen to somatic tissues. Journals of Gerontology - Series A Biological Sciences and Medical Sciences 72:616–623. https://doi.org/10.1093/gerona/glw094
Tokar, D.R., Veleta, K.A., Canzano, J., Hahn, D.A., Hatle, J.D., 2014. Vitellogenin RNAi halts ovarian growth and diverts reproductive proteins and lipids in young grasshoppers. Integrative and comparative biology 54:931–941. https://doi.org/10.1093/icb/icu068
Hatle, J.D., Kellenberger, J.W., Viray, E., Smith, A.M., Hahn, D.A., 2013. Life-extending ovariectomy in grasshoppers increases somatic storage, but dietary restriction with an equivalent feeding rate does not. Experimental Gerontology 48:966–972. https://doi.org/10.1016/j.exger.2013.06.006
Drewry, M.D., Williams, J.M., Hatle, J.D., 2011. Life-extending dietary restriction and ovariectomy result in similar feeding rates but different physiologic responses in grasshoppers. Experimental Gerontology 46:781–786. https://doi.org/10.1016/j.exger.2011.06.003
Judd, E.T., Wessels, F.J., Drewry, M.D., Grove, M., Wright, K., Hahn, D.A., Hatle, J.D., 2011. Ovariectomy in grasshoppers increases somatic storage, but proportional allocation of ingested nutrients to somatic tissues is unchanged. Aging Cell 10:972–979. https://doi.org/10.1111/j.1474-9726.2011.00737.x
Hatle, J., Oppert, B., 2010. Insect Gut Physiology and Nutrition: Insights into Diverse Systems. African Entomology 18:1–7. https://doi.org/10.4001/003.018.0101
Judd, E.T., Hatle, J.D., Drewry, M.D., Wessels, F.J., Hahn, D.A., 2010. Allocation of nutrients to somatic tissues in young ovariectomized grasshoppers. Integrative and Comparative Biology 50:818–828. https://doi.org/10.1093/icb/icq105
Hathaway, M., Hatle, J., 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 Molecular and Integrative Physiology 154:323–332. https://doi.org/10.1016/j.cbpa.2009.06.018
Fronstin, R.B., Hatle, J.D., 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. https://doi.org/10.1242/jeb.009530
Hahn, D.A., James, L.N., Milne, K.R., Hatle, J.D., 2008. Life‐history plasticity after attaining a dietary threshold for reproduction is associated with protein storage in flesh flies. Functional Ecology 22:1081–1090. https://doi.org/10.1111/j.1365-2435.2008.01451.x
Hatle, J.D., Paterson, C.S., Jawaid, I., Lentz, C., Wells, S.M., Fronstin, R.B., 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. https://doi.org/10.1016/j.exger.2008.08.005
Fronstin, R.B., Hatle, J.D., 2006. Juvenile hormone controls the timing of oviposition independent of the storage threshold in lubber grasshoppers. Integrative and Comparative Biology 46:E194. ://BIOSIS:PREV200800284989
Hatle, J.D., Waskey, T., Juliano, S.A., 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. https://doi.org/10.1007/s00360-005-0028-9
Fei, H., Martin, T.R., Jaskowiak, K.M., Hatle, J.D., Whitman, D.W., Borst, D.W., 2005. Starvation affects vitellogenin production but not vitellogenin mRNA levels in the lubber grasshopper, Romalea microptera. Journal of Insect Physiology 51:435–443. https://doi.org/10.1016/j.jinsphys.2004.11.014
Hatle, J.D., Wells, S.M., Allen, I.C., Fuller, L.E., Melnyk, S., Quattrochi, J., 2005. Calorie restriction enhances longevity without altering hemolymph protein or lipid storage in female grasshoppers. Integrative and Comparative Biology 45:1142. ://BIOSIS:PREV200600293257
Hathaway, M.J., Li, S., Ding, X., Hatle, J.D., Borst, D.W., 2004. Molecular characterization of hemolymph storage proteins in the lubber grasshopper. Integrative and Comparative Biology 44:705–705. ://000226721401319
Hatle, J.D., Andrews, A.L., Crowley, M.C., Juliano, S.A., 2004. Interpopulation variation in developmental titers of vitellogenin, but not storage proteins, in lubber grasshoppers. Physiological and Biochemical Zoology 77:631–640. https://doi.org/10.1086/420946
Hatle, J.D., Miller, W.A., Borst, D.W., 2003. Canalization of development and ecdysteroid timing during the last instar in lubber grasshoppers. Journal of Insect Physiology 49:73–80. https://doi.org/10.1016/s0022-1910(02)00250-0
Hatle, J.D., Juliano, S.A., Borst, D.W., 2003. Hemolymph ecdysteroids do not affect vitellogenesis in the lubber grasshopper. Archives of Insect Biochemistry and Physiology 52:45–57. https://doi.org/10.1002/arch.10067
Hatle, J.D., Borst, D.W., Juliano, S.A., 2003. Plasticity and canalization in the control of reproduction in the lubber grasshopper. Integrative and Comparative Biology 43:635–645. https://doi.org/10.1093/icb/43.5.635
Hatle, J.D., Ding, X., Barry, T.O., Borst, D.W., 2003. Storage protein levels in lubber grasshoppers are not regulated by juvenile hormone. Integrative and Comparative Biology 43:1050. ://BIOSIS:PREV200510164269
Hatle, J.D., Crowley, M.C., Andrews, A.L., Juliano, S.A., 2002. Geographic variation of reproductive tactics in lubber grasshoppers. Oecologia 132:517–523. https://doi.org/10.1007/s00442-002-0994-5
Hatle, J.D., Salazar, B.A., Whitman, D.W., 2002. Survival advantage of sluggish individuals in aggregations of aposematic prey, during encounters with ambush predators. Evolutionary Ecology 16:415–431. ://000178719500001
Luker, L.A., Hatle, J.D., Juliano, S.A., 2002. Reproductive responses to photoperiod by a South Florida population of the grasshopper Romalea microptera (Orthoptera: Romaleidae). Environmental Entomology 31:702–707.
Waskey, T.J., Hatle, J.D., Juliano, S.A., 2002. Vitellogenin production rates underlying reproductive plasticity and canalization in the lubber grasshopper. Integrative and Comparative Biology 42:1331–1331. ://000182356600744
Hatle, J.D., Borst, D.W., Eskew, M.R., Juliano, S.A., 2001. Maximum titers of vitellogenin and total hemolymph protein occur during the canalized phase of grasshopper egg production. Physiological and Biochemical Zoology 74:885–893. https://doi.org/10.1086/324475
Hatle, J.D., Salazar, B.A., Whitman, D.W., 2001. Sluggish movement and repugnant odor are positively interacting insect defensive traits in encounters with frogs. Journal of Insect Behavior 14:479–496. ://000170358000006
Lorenz, D.L., Hatle, J.D., Lewis, H.D., 2001. Characterization of a major hemolymph protein (MHPb) and its role in the ovarian development of the lubber grasshopper. American Zoologist 41:1510–1510. ://000174306500454
Martin, T.R., Jaskowiak, K.M., Fei, H., Hatle, J.D., Borst, D.W., 2001. The physiological effects of starvation on vitellogenesis in the lubber grasshopper. American Zoologist 41:1514–1515. ://000174306500469
Miller, W.A., Hatle, J.D., Borst, D.W., 2001. The second half of the molt cycle in lubber grasshoppers is developmentally inflexible. American Zoologist 41:1527. ://BIOSIS:PREV200200431445
Olson, J.R., Tillman, E.G., Hatle, J.D., Juliano, S.A., 2001. A threshold for initiating the canalized phase of reproduction in the lubber grasshopper. American Zoologist 41:1546–1546. ://000174306500573
Tillman, E.G., Olson, J.R., Hatle, J.D., Juliano, S.A., 2001. Estimating a threshold of hemolymph proteins necessary for reproduction of lubber grasshoppers. American Zoologist 41:1607–1608. ://BIOSIS:PREV200200498229
Andrews, A.L., Hatle, J.D., Crowley, M.C., Juliano, S.A., 2000. Hemolymph protein profiles during egg production in three populations of the Eastern lubber grasshopper. American Zoologist 40:930. ://BIOSIS:PREV200100320819
Borst, D.W., Eskew, M.R., Wagner, S.J., Shores, K., Hunter, J., Luker, L., Hatle, J.D., Hecht, L.B., 2000. Quantification of juvenile hormone III, vitellogenin, and vitellogenin-mRNA during the oviposition cycle of the lubber grasshopper. Insect Biochemistry and Molecular Biology 30:813–819. https://doi.org/10.1016/s0965-1748(00)00053-9
Crowley, M.C., Hatle, J.D., Andrews, A.L., Juliano, S.A., 2000. Inter-population differences in reproductive tacts in lubber grasshoppers. American Zoologist 40:986. ://BIOSIS:PREV200100351383
Hatle, J.D., Borst, D.W., Eskew, M.R., Juliano, S.A., 2000. Maximum titers of vitellogenin and storage protein occur during the canalized phase of grasshopper oogensis. American Zoologist 40:1048. ://BIOSIS:PREV200100367880
Luker, L.A., Hatle, J.D., Juliano, S.A., 2000. The effects of photoperiod on the length of the oviposition cycle of the grasshopper, Romalea microptera. American Zoologist 40:1110–1110. ://000168132000483
Hatle, J.D., Spring, J.H., 1999. Tests of potential adipokinetic hormone precursor related peptide (APRP) functions: Lack of responses. Archives of Insect Biochemistry and Physiology 42:163–166. ://000082913500006
Knepp, M.D., Hatle, J.D., Borst, D.W., 1999. Juvenile hormone degradation in the lubber grasshopper. American Zoologist 39:26A-26A. ://000085800400150
Wagner, S.J., Shores, K.M., Luker, L.A., Hatle, J.D., Hecht, L.B., Borst, D.W., 1999. Vitellogenesis in the lubber grasshopper. American Zoologist 39:26A-26A. ://000085800400151