Publications

Featured Publications

 

Ecoimmunology Book 2Demas, G. E., & Nelson, R. J. (Eds.) (2011). Ecoimmunology. New York: Oxford University Press.

 

 

H&B 2004 Mast Cell Cover

Photomicrographs of the olfactory bulb of female prairie voles featured on the cover of Hormones and Behavior, Volume 44 (2003).

 

 

Seasonal Patterns Book 2

Nelson, R. J., Demas, G. E., Klein, S. L., & Kriegsfeld, L. K. (2002). Seasonal Patterns of Stress, Immune Function, & Disease. Cambridge: Cambridge University Press.

 

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Publications

2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007| 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996 | 1995 | 1994

2018

Jalabert, C., Munley, K. M., Demas, G. E., & Soma, K. K. (2018). Aggressive behavior. In P. Swanson & M.K. Skinner (Section Eds.), Encyclopedia of Reproduction (2nd ed., Volume 6: Comparative Reproduction). Amsterdam: Elsevier. PDF

Munley, K. M., Rendon, N. M., & Demas, G. E. (2018). Neural androgen synthesis and aggression: Insights from a seasonally breeding rodent. Frontiers in Endocrinology, 9, 136. PDF

Sylvia, K. E., Deyoe, J. E., & Demas, G. E. (2018). Early-life sickness may predispose Siberian hamsters to behavioral changes following alterations of the gut microbiome in adulthood. Brain, Behavior, and Immunity, 73, 571-583. PDF | Commentary

Sylvia, K. E., Báez Ramos, P., & Demas, G. E. (2018). Sickness-induced changes in physiology do not affect fecundity or same-sex behavior. Physiology & Behavior, 184, 68-77. PDF

Sylvia, K. E., & Demas, G. E. (2018). A gut feeling: Microbiome-brain-immune interactions modulate social and affective behaviors. Hormones and Behavior, 99, 41-49. PDF

Sylvia, K. E., & Demas, G. E. (2018). Acute intraperitoneal lipopolysaccharide influences the immune system in the absence of gut dysbiosis. Physiological Reports, 6, e13639. PDF

Sylvia, K.E., Lorenz, T. K., Heiman, J. R., & Demas, G. E. (2018). Physiological predictors of leptin vary during menses and ovulation in healthy women. Reproductive Biology, in press. PDF

2017

Ashley, N. T., & Demas, G. E. (2017). Neuroendocrine-immune circuits, phenotypes, and interactions. Hormones and Behavior, 87, 25-34. PDF

Bailey, A. M., Legan, S. J., Meretsky, V. J., & Demas, G. E. (2017). Effects of exogenous leptin on seasonal reproductive responses to interacting environmental cues in female Siberian hamsters. General and Comparative Endocrinology, 250, 95-103. PDF

Bowden, R. M., French, S. S., & Demas, G. E. (2017). Introduction to ecoimmunology: An integrative approach. Journal of Experimental Zoology Part A, 327, 219-221. PDF

Carlton, E. D., & Demas, G. E. (2017). Glucose and insulin modulate sickness responses in male Siberian hamsters. General and Comparative Endocrinology, 242, 83-91. PDF

Ho, J. M., Bergeon Burns, C. M., Rendon, N. M., Rosvall, K. A., Bradshaw, H. B., Ketterson, E. D., & Demas, G. E. (2017). Lipid signaling and fat storage in the dark-eyed junco. General and Comparative Endocrinology, 247, 166-173. PDF

Lorenz, T. K., Demas, G. E., & Heiman, J. R. (2017). Partnered sexual activity moderates menstrual cycle-related changes in inflammation markers in healthy women: an exploratory observational study. Fertility and Sterility, 107, 763-773.

Lorenz, T. K., Heiman, J. R., & Demas, G. E. (2017). Testosterone and immune-reproductive tradeoffs in healthy women. Hormones and Behavior, 88, 122-130. PDF

Lorenz, T. K., Heiman, J. R., & Demas, G. E. (2017). Interactions among sexual activity, menstrual cycle phase, and immune function in healthy women. Journal of Sexual Research, 21, 1-9.

Rendon, N. M., Amez, A. C., Proffitt, M. R., Bauserman, E. R., & Demas, G. E. (2017). Aggressive behaviours track transitions in seasonal phenotypes of female Siberian hamsters. Functional Ecology, 31, 1071-1081. PDF

Sylvia, K. E., & Demas, G. E. (2017). Overcoming neonatal sickness: Sex-specific effects of sickness on physiology and social behavior. Physiology & Behavior, 179, 324-332. PDF

Sylvia, K. E., & Demas, G. E. (2017). A return to wisdom: Using sickness behaviors to integrate ecological and translational research. Integrative and Comparative Biology, 57, 1204-1213. PDF

Sylvia, K. E., Jewell, C. P., Rendon, N. M., St. John, E. A., & Demas, G. E. (2017). Sex-specific modulation of the gut microbiome and behavior in Siberian hamsters. Brain, Behavior, and Immunity, 60, 51-62. PDF

2016

Bailey, A. M., Rendon, N. M., O’Malley, K. J., & Demas, G. E. (2016). Food as a supplementary cue triggers seasonal changes in aggression, but not reproduction, in Siberian hamsters. Physiology & Behavior, 167, 298-308. PDF

Demas, G. E., & Jasnow, A. M. (2016). Empathy in prairie voles: Is this the consolation prize? Learning & Behavior, 44, 303-304. PDF

Demas, G. E., & Sylvia, K. E. (2016). There’s no place like biome: Can helminths restore the body’s ecosystem? Brain, Behavior, and Immunity, 51, 12-13. PDF

French, S. S., Chester, E. M., & Demas, G. E. (2016). Timing of Maternal Immunization Affects Immunological and Behavioral Outcomes of Adult Offspring in Siberian Hamsters (Phodopus sungorus). Journal of Experimental Zoology Part A, 325, 377-389. PDF

Rendon, N. M., & Demas, G. E. (2016). Bi-directional actions of dehydroepiandrosterone and aggression in female Siberian hamsters. Journal of Experimental Zoology Part A, 325, 116-121. PDF

Rendon, N. M., Soini, H. A., Scotti, M. A., Novotny, M.V., & Demas, G. E. (2016). Urinary volatile compounds differ across reproductive phenotypes and following aggression in male Siberian hamsters. Physiology & Behavior, 164, 58-67. PDF

Rendon, N. M., Soini, H. A., Scotti, M. A., Weigel, E. R., Novotny, M.V., & Demas, G. E. (2016). Photoperiod and aggression induce changes in ventral gland compounds exclusively in male Siberian hamsters. Hormones and Behavior, 81, 1-11. PDF

2015

Carlton, E. D., & Demas, G. E. (2015). Body mass affects seasonal variation in sickness intensity in a seasonally breeding rodent. Journal of Experimental Biology, 218, 1667-1676. PDF

Demas G. E., & Carlton, E. D. (2015). Ecoimmunology for psychoneuroimmunologists: Considering context in neuroendocrine–immune–behavior interactions Brain, Behavior, and Immunity, 44, 9-16. PDF

Lorenz, T. K., Heiman, J. R., & Demas, G. E. (2015). Sexual activity modulates shifts in TH1/TH2 cytokine profile across the menstrual cycle: an observational study. Fertility and Sterility, 104, 1513-1521. PDF

Lorenz, T. K., Demas, G. E., & Heiman, J. R. (2015). Interaction of menstrual cycle phase and sexual activity predicts mucosal and systemic humoral immunity in healthy women. Physiology & Behavior, 152, 92-98. PDF

Rendon, N. M., Keesom, S. M., Amadi, C., Hurley, L. M., & Demas, G. E. (2015). Vocalizations convey sex, seasonal phenotype, and aggression in a seasonal mammal. Physiology & Behavior, 152, 143-150. PDF

Rendon, N. M., Rudolph, L. M., Sengelaub, D. R., & Demas, G. E. (2015). The agonistic adrenal: melatonin elicits female aggression via regulation of adrenal androgens. Proceedings of the Royal Society B, 282, 1819. PDF

Scotti, M. A., Carlton, E. D., Demas, G. E., & Grippo, A. J. (2015). Social isolation disrupts innate immune responses in both male and female prairie voles and enhances agonistic behavior in female prairie voles (Microtus ochrogaster). Hormones and Behavior, 70, 7-13. PDF

Scotti, M. A., Rendon, N. M., Greives, T. J., Romeo, R. D., & Demas, G. E. (2015). Short-day aggression is independent of changes in cortisol or glucocorticoid receptors in male Siberian hamsters (Phodopus sungorus). Journal of Experimental Zoology Part A, 323, 331-341. PDF

Soma, K. K., Rendon, N. M., Boonstra, R., Albers, H. E., & Demas, G. E. (2015). DHEA effects on brain and behavior: insights from comparative studies of aggression. Journal of Steroid Biochemistry and Molecular Biology, 145, 261-272. PDF

2014

Bailey A. M., Demas G. E., & Kriegsfeld L. J. (2014). Biological Rhythms. Reference Module in Biomedical Sciences. Elsevier. PDF

Bergeon Burns, C. M., Rosvall, K. A., Hahn, T. P., Demas, G. E., & Ketterson, E. D. (2014). Examining sources of variation in HPG axis function among individuals and populations of the dark-eyed junco. Hormones and Behavior, 65, 179-187. PDF

Carlton, E. D., Cooper, C. L., & Demas, G. E. (2014). Metabolic stressors and signals differentially affect energy allocation between reproduction and immune function. General and Comparative Endocrinology, 208, 21-29. PDF

Carlton, E. D., & Demas, G. E. (2014). Leptin mediates seasonal variation in some but not all symptoms of sickness in Siberian hamsters. Hormones and Behavior, 66, 802-811. PDF

Downs, C. J., Adelman, J. S., & Demas, G. E. (2014). Mechanisms and methods in ecoimmunology: integrating within-organism and between-organism processes. Integrative and Comparative Biology, 54, 340-352. PDF

2013

French, S. S., Chester, E. M., & Demas, G. E. (2013). Maternal immune activation affects litter success, size and neuroendocrine responses related to behavior in adult offspring. Physiology & Behavior, 119, 175-184. PDF

Rynkiewicz, E. C., Hawlena, H., Durden, L. A., Hastriter, M. W., Demas, G. E., & Clay, K. (2013). Associations between innate immune function and ectoparasites in wild rodent hosts. Parasitology Research, 112, 1763-1770. PDF

2012

Bedrosian, T. A., Fonken, L. K., Demas, G. E., & Nelson, R. J. (2012). Photoperiod-dependent effects of neuronal nitric oxide synthase inhibition on aggression in Siberian hamsters. Hormones and Behavior, 61, 176-180. PDF

Carlton, E. D., Demas, G. E., & French, S. S. (2012). Leptin, a neuroendocrine mediator of immune responses, inflammation, and sickness behaviors. Hormones and Behavior, 62, 272-279. PDF

Ho, J. M., Smith, N. S., Adams, S. A., Bradshaw, H. B., & Demas, G. E. (2012). Photoperiodic changes in endocannabinoid levels and energetic responses to altered signalling at CB1 receptors in Siberian hamsters. Journal of Neuroendocrinology, 24, 1030-1039. PDF

Kojima, S., Stewart, R. A., Demas, G. E., & Alberts, J. R. (2012). Maternal contact differentially modulates central and peripheral oxytocin in rat pups during a brief regime of mother-pup interaction that induces a filial huddling preference. Journal of Neuroendocrinology, 24, 831-840. PDF

2011

Demas, G. E., Soma, K. K., & Albers, H. E. (2011). DHEA and Aggression. In R. R. Watson (Ed.), DHEA in Human Health and Aging. London: Taylor & Francis Group. PDF

Demas, G. E., & Nelson, R. J. (Eds.) (2011). Eco-Immunology. New York: Oxford University Press.

Demas, G. E., Zysling, D. A., Beecher, B., Muehlenbein, M. P., & French, S. S. (2011). Beyond phytohemagglutanin: assessment of vertebrate immune function across ecological contexts. Journal of Animal Ecology, 80, 710-730. PDF

French, S. S., Dearing, M. D., & Demas, G. E. (2011). Leptin as a physiological mediator of energetic trade-offs in eco-immunology. Integrative and Comparative Biology, 51, 505-513. PDF

Greives, T. J., Long, K. L., Burns, C. M., & Demas, G. E. (2011). Response to exogenous kisspeptin varies according to sex and reproductive condition in Siberian hamsters (Phodopus sungorus). General and Comparative Endocrinology, 170, 172-179. PDF

Ruiz, M., Wang, D., Reinke, E. A., Demas, G. E., & Martins, E. P. (2011). Trade-offs between reproductive coloration and innate immunity in a natural population of female sagebush lizards, Sceloperus graciosusHerpetological Journal, 21, 131-134. PDF

2010

Chester, E. M., Banu, T., & Demas, G. E. (2010). Effects of social defeat on humoral immunity and disease resistance in Siberian hamsters. Physiology & Behavior, 101, 53-58. PDF

Demas, G. E. (2010). In vivo but not in vitro leptin enhances lymphocyte proliferation in Siberian hamsters (Phodopus sungorus). General and Comparative Endocrinology, 166, 314-319. PDF

Demas, G. E., Adamo S. A., & French, S. S. (2010). Neuroendocrine-immune crosstalk in vertebrates and invertebrates: implications for host defence. Functional Ecology, 1-11. PDF

French, S. S., DeNardo, D., Greives, T. J., & Demas, G. E. (2010). Effects of tourism on endocrine and immune response of Galapagos marine iguanas. Hormones and Behavior, 58, 792-799. PDF

Garcia, N., Greives, T. J., French, S. S., Zysling, D. A., Chester, E. M., & Demas, G. E. (2010). Insulin increases adaptive immune response in short- but not long-day Siberian hamsters (Phodopus sungorus). Proceedings of the Royal Society B, 277, 2211-2218. PDF

Greives, T. J., French, S. S., Zysling, D. A., Garcia, N. W., & Demas, G. E. (2010). The glutamate agonist NMDA blocks gonadal regression and enhances antibody response to an immune challenge in the photoperiodic Siberian hamster (Phodopus sungorus). Journal of Comparative Physiology B, 180, 267-277. PDF

Ho, J. M., Murray, J. H., Demas, G. E., & Goodson, J. L. (2010). Vasopressin cell groups exhibit strongly divergence responses to copulation and male-male interactions in mice. Hormones and Behavior, 58, 368-377. PDF

Nelson, R. J., & Demas, G. E. (2010). Seasonal changes in immune function and disease. In S. Segerstrom (Ed.), The Oxford Handbook of Psychoneuroimmunology. New York: Oxford University Press. PDF

Ruiz, M., French, S. S., Demas, G. E., & Martins, E. P. (2010). Food supplementation and testosterone interact to influence reproductive behavior and immune function. Hormones and Behavior, 57, 134-139. PDF

2009

Demas, G. E., Weil, Z. M., & Nelson, R. J. (2009). Photoperiodism in mammals: Regulation of nonreproductive traits. In R. J. Nelson, D. L. Denlinger, & D. E. Somers (Eds.), Photoperiodism: The Biological Calendar. Oxford: Oxford University Press. PDF

French, S. S., Greives, T. J., Zysling, D., Chester, E. M., & Demas, G. E. (2009). Maternal leptin levels increase litter size and suppress immune response. Proceedings of the Royal Society B, 276, 4003-11. PDF

French, S. S., Moore, M. C., & Demas, G. E. (2009). Ecoimmunology: The organism in context. Integrative and Comparative Biology, 49, 246-53. PDF

Scotti, M. A., Newman, A. E.M, Schmidt, K. L., Bonu, T. N., Soma, K. K., & Demas, G. E. (2009). Aggressive encounters differentially affect circulating androgen levels in male Siberian hamsters (Phodopus sungorus). Hormones and Behavior, 56, 376-81. PDF

Zysling, D. A., Garst, A., & Demas, G. E. (2009). Photoperiod and food restriction stress differentially affects reproductive and immune responses in Siberian hamsters (Phodopus sungorus). Functional Ecology, 49, 246-53. PDF

2008

Durazzo, A., Proud, K., & Demas, G. E. (2008). Experimentally-induced sickness decreases food intake, but not hoarding in Siberian hamsters (Phodopus sungorus). Behavioural Processes, 79, 195-198. PDF

Freedberg, S., Grieves, T. J., Beecher, N., Ewert, M. A., Nelson, C., & Demas, G. E. (2008). Incubation environment affects immune system development in a turtle with environmental sex determination. Journal of Herpetology, 42, 536-541. PDF

Greives, T. J., Bentley, G. E., Kriegsfeld, L. J., & Demas, G. E. (2008). Recent advances in reproductive neuroendocrinology: A role for RFamide peptides in seasonal reproduction? Proceedings of the Royal Society B, 275, 1943-1951. PDF

Greives, T. J., Humber, S. A., Scotti, M. A., Demas, G. E., & Kriegsfeld, L. J. (2008). Photoperiod and gonadal steroids alter hypothalamic kisspeptin in the photoperiodic Siberian hamster (Phodopus sungorus). Journal of Neuroendocrinology, 20, 1-9. PDF

Greives, T. J., Kriegsfeld, L. J., & Demas, G. E. (2008). Exogenous kisspeptin does not alter photoperiod-induced gonadal regression in male Siberian hamsters (Phodopus sungorus). General and Comparative Endocrinology, 156, 552-558. PDF

Schubert, K.A, Lobke, M. V., Stavasius, F., Demas, G. E., Daan, S., & Henk, V. (2008). Female mice respond differently to costly foraging vs. food restriction. Journal of Experimental Biology, 211, 2214-2223. PDF

Scotti, M. A., Belén, J., Jackson, G. E., & Demas, G. E. (2008). The role of testosterone and DHEA in the mediation of seasonal territorial aggression in male Siberian hamsters (Phodopus sungorus). Physiology & Behavior, 95, 633-640. PDF

Soma, K. K., Scotti, M. A., Neuman, A., & Demas, G. E. (2008). Novel mechanisms of steroid regulation of aggression. Frontiers in Neuroendocrinology, 29, 476-489. PDF

2007

Demas, G. E., Albers, H. E., Cooper, M., & Soma, K. K. (2007). Novel mechanisms underlying neuroendocrine regulation of aggression: A synthesis of rodent, avian and primate studies. In  J. D. Blaustein (Ed.), Handbook of Neurochemistry and Molecular Neurobiology: Behavioral Neurochemistry (3rd Ed.), Neuroendocrinology and Molecular Neurobiology. Boston: Springer. PDF

Greives, T. J., Mason, A. O., Scotti, M. A., Levine, J., Ketterson, E. D. Kriegsfeld, L. J., & Demas, G. E. (2007). Environmental control of kisspeptin: implications for seasonal reproduction. Endocrinology, 148, 1158-1566. PDF

Mason, A. O. Greives, T. J., Scotti, M-A. L., Levine, J., Ketterson, E. D., Demas, G. E., & Kriegsfeld, L. J. (2007). Suppression of kisspeptin expression and gonadotropic axis sensitivity following exposure to inhibitory day lengths in female Siberian hamsters. Hormones and Behavior, 52, 492-498. PDF

Scotti, M. A., & Demas, G. E. (2007). Photoperiodic changes in aggression are independent of gonadal steroids in female Siberian hamsters (Phodopus sungorus). Hormones and Behavior, 52, 183-190. PDF

Zysling, D. A., & Demas, G. E. (2007). Metabolic stress differentially affects humoral immunity in long- and short-day housed Siberian hamsters (Phodopus sungorus). Journal of Comparative Physiology B, 177, 339-347. PDF

2006

Greives, T. J., McGlothlin, J. W., Jawor, J. M., Demas, G. E., & Ketterson, E. D. (2006). Testosterone and immune function co-vary in a wild population of breeding dark-eyed juncos (Junco hyemalis). Functional Ecology, 20, 812-818. PDF

Nelson, R. J., Chiavegatto, S., Demas, G. E., & Trainor B. (2006). Pleiotropic contributions of neuronal nitric oxide synthase (NOS-1) to aggressive behavior. Neuroscience and Biobehavioral Reviews, 30, 346-355. PDF

Zysling, D. A., Greives, T. J., Breuner, C., Demas, G. E., & Ketterson, E. D. (2006). Behavioral and physiological responses to experimentally elevated testosterone in female dark-eyed juncos: implications for the evolution of sexual dimorphism. Hormones and Behavior, 50, 200-207. PDF

2005

Demas, G. E., & Sakaria, S. (2005). Leptin regulates energetic tradeoffs between body fat and humoural immunity. Proceedings of the Royal Society B, 272, 1845-1850. PDF

Faruzzi, A. N., Solomon, M. B., Demas, G. E., & Huhman, K. L. (2005). Gonadal hormones modulate the display of submissive behavior in socially defeated female Syrian hamsters. Hormones and Behavior, 47, 569-575. PDF

Grindstaff, J. L., Demas, G. E., & Ketterson, E. D. (2005). Dietary protein restriction affects egg size and number but does not reduce maternal antibody transfer in Japanese quail (Coturnix japonica). Journal of Animal Ecology, 74, 1051-1058. PDF

Nelson, R. J., Demas, G. E., & Chiavegatto, S. (2005). Nitric oxide and aggression. In R. J. Nelson (Ed.), Biology of Aggression. Oxford: Oxford University Press.

2004

Bartness, T. J., & Demas, G. E. (2004). Studies of food intake: Lessons
from nontraditionally studied species. In E. M. Stricker & S. Woods (Eds.), Handbook of Neurobiology, Vol. 14: Neurobiology of Food and Fluid Intake. New York: Kluwer Academic Press. PDF

Demas, G. E. (2004). Persistent photoperiodic effects on immune responsiveness: shedding light on immunity. American Journal of Physiology, 286, 18-19. PDF

Demas, G. E. (2004). The energetics of immunity: A neuroendocrine link between energy balance and immune function. Hormones and Behavior, 43, 75-80. PDF

Demas, G. E., Johnson, C., & Polacek, K. M. (2004). Social interactions differentially affect reproductive and immune responses in Siberian hamsters. Physiology & Behavior, 83, 73-79. PDF

Demas, G. E., & Kriegsfeld, L. J. (2004). Biological rhythms. In L. Martini (Ed.), Handbook of Endocrine Diseases. New York: Academic Press. PDF

Demas, G. E., Polacek, K. M., Durazzo, A., & Jasnow, A. M. (2004). Adrenal hormones mediate melatonin-induced increases in aggression in male Siberian hamsters (Phodopus sungorus). Hormones and Behavior, 46, 582-591. PDF

Nelson, R. J., & Demas, G. E. (2004). Seasonal patterns of stress and disease. Current Directions in Psychological Science, 13, 198-201. PDF

Wen, J., Hotchkiss, A., Demas, G. E., & Nelson, R. J. (2004). Photoperiod affects neuronal nitric oxide synthase and aggressive behavior in male Siberian hamsters (Phodopus sungorus). Journal of Neuroendocrinology, 16, 916-921. PDF

2003

Demas G. E., Bartness, T. J., Nelson, R. J., & Drazen, D. L. (2003). Photoperiod modulates the effects of norepinephrine on lymphocyte proliferation in Siberian hamsters. American Journal of Physiology, 285, R873-879. PDF

Demas, G.E, & Nelson, R. J. (2003). Lack of immunological responsiveness to photoperiod in a tropical rodent, Peromyscus aztecus hylocetes. Journal of Comparative Physiology B, 173, 171-176. PDF

Demas, G. E., Drazen, D. L., & Nelson, R. J. (2003). In vivo and in vitro norepinephrine suppresses cell-mediated immunity in Siberian hamsters (Phodopus sungorus). American Journal of Physiology, 285, R873-897. PDF

Demas G. E., Drazen, D. L., & Nelson, R. J. (2003). Reductions in total body fat decrease humoral immunity. Proceedings of the Royal Society of Sciences B, 270, 905-911. PDF

Kriegsfeld, L. J., Demas, G. E., Hotchkiss, A., Silverman, A. J., Silver, R., & Nelson, R. J. (2003). Brain mast cells are influenced by estrus induction in female prairie voles (Microtus ochrogaster). Hormones and Behavior, 44, 377-384. PDF

2002

Bartness, T. J., Demas, G. E., & Song, C. K. (2002). Seasonal changes in adiposity: the roles of the photoperiod, melatonin and other hormones, and sympathetic nervous system. Experimental Biology and Medicine 227: 363-376. PDF

Demas, G. E. (2002). Splenic denervation blocks leptin-induced enhancement of humoral immunity in Siberian hamsters (Phodopus sungorus). Neuroendocrinology, 76, 178-184. PDF

Demas, G. E., Bowers, R., Bartness, T. J., & Gettys, T. W. (2002). Photoperiodic regulation of gene expression in adipose tissue in Siberian hamsters (Phodopus sungorus). American Journal of Physiology , 282, R114-121. PDF

Demas, G. E., Drazen, D. L., Jasnow, A. J., Bartness, T. J. & Nelson, R. J. (2002). Sympathoadrenal system differentially affects photoperiodic changes in humoral immunity of Siberian hamsters (Phodopus sungorus). Journal of Neuroendocrinology, 14, 29-35. PDF

Drazen, D. L., Jasnow, A. J., Nelson, R. J., & Demas, G.E. (2002). Exposure to short days, but not short-term melatonin, enhances humoral immunity of male Syrian hamsters (Mesocricetus auratus). Journal of Pineal Research, 33, 118-124. PDF

Jasnow, A. J., Huhman, K. L., Bartness, T. J., & Demas, G. E. (2002). Short days and exogenous melatonin increase aggression of male Syrian hamsters (Mesocricetus auratus). Hormones and Behavior, 42, 13-20. PDF

Nelson, R. J., Demas, G. E., Klein, S. L., & Kriegsfeld, L. K. (2002). Seasonal Patterns of Stress, Immune Function and Disease. Cambridge: Cambridge University Press. PDF

2001

Bartness, T. J., Song, C. K., & Demas, G. E. (2001). SCN efferents to peripheral tissues: Implications for biological rhythms. Journal of Biological Rhythms, 16, 196-204. PDF

Demas, G. E., & Bartness, T. J. (2001). Direct innervation of white fat and adrenal medullary catecholamines mediate photoperiodic changes in body fat. American Journal of Physiology, 281, R1499-1505. PDF

Demas G. E., & Bartness, T. J. (2001). Novel method for localized, functional sympathetic nervous system denervation of peripheral tissue using guanethidine. Journal of Neuroscience Methods, 122, 21-28. PDF

Demas, G. E., El-Bakry, H. A., Mintz, E. M., Zahran, W. M., & Bartness, T. J. (2001). Wheel-running activity patterns of five species of desert rodents. Biological Rhythm Research, 32, 1-16. PDF

Drazen D. L., Demas G. E., & Nelson, R. J. (2001). Leptin effects on immune function and energy balance are photoperiod-dependent in Siberian hamsters (Phodopus sungorus). Endocrinology, 142, 2768-2775. PDF

Jasnow, A. J., Drazen, D.L, Nelson, R. J., Huhman, K. L., & Demas, G. E. (2001). Acute and chronic social defeat suppresses humoral immunity of male Syrian hamsters (Mesocricetus auratus). Hormones and Behavior, 40, 428-433. PDF

2000

Jasnow, A. M., Bartness, T. J., Huhman, K. L., & Demas, G. E. (2000). Short-day increases in aggression are inversely related to circulating testosterone concentrations in male Siberian hamsters (Phodopus sungorus). Hormones and Behavior, 38, 102-110. PDF

Sampei, K., Goto, S., Alkayed, N. J., Crain, B. J., Korach, K. S., Traystman, R. J., Demas, G. E., Nelson, R. J., & Hurn, P. D. (2000). Stroke in estrogen receptor-alpha-deficient mice. Stroke, 31, 738-743. PDF

1999

Demas, G. E., & Bartness, T. J. (1999). Effects of food deprivation and metabolic fuel utilization on food hoarding by jirds (Meriones shawi). Physiology & Behavior, 67, 243-248. PDF

Demas, G. E., Kriegsfeld, L. J., Poss, K. D., Tonegawa, S., & Nelson, R. J. (1999). Circadian locomotor rhythms in mice with targeted disruption of the gene for carbon monoxide synthesizing enzyme, heme oxygenase-2. Biological Rhythm Research, 30, 282-289.

Demas, G. E., Kriegsfeld, L. J., Blackshaw, S., Nelson, R. J., & Snyder, S. H. (1999). Elimination of aggressive behavior in male mice lacking endothelial nitric oxide synthase. Journal of Neuroscience, 19, RC30 (1-5). PDF

Demas, G. E., Moffatt, C. A., Drazen, D. L., & Nelson, R. J. (1999). Castration does not inhibit aggressive behavior in adult male prairie voles (Microtus ochrogaster). Physiology & Behavior, 66, 59-62. PDF

Kriegsfeld, L. J., Demas, G. E., Burnett, A. L., & Nelson, R. J. (1999). Ejaculatory abnormalities in mice lacking the gene for endothelial nitric oxide synthase (eNOS-/-). Physiology & Behavior, 67, 561-566. PDF

Kriegsfeld, L. J., Eliasson, M. J. L., Blackshaw, S., Demas, G. E., Nelson, R. J. & Snyder, S. H. (1999). Nocturnal motor coordination deficits in neuronal nitric oxide synthase knock-out mice. Neuroscience, 89, 311-315. PDF

Kriegsfeld, L. J., Demas, G. E., Dawson, T. M., Dawson, V. L., Snyder, S. H. & Nelson, R. J. (1999). Circadian locomotor analysis of male mice lacking the gene for neuronal nitric oxide synthase (nNOS-/-). Journal of Biological Rhythms, 14, 20-27. PDF

1998

Bentley, G. E., Demas, G. E., Nelson, R. J. & Ball, G. F. (1998). Melatonin, immune function, and reproductive state in male European starlings (Sturnus vulgaris). Proceedings of the Royal Society B, 265, 1191-1195. PDF

Burnett, A. L., Poss, K., Klein, S. L., Kriegsfeld, L. J., Demas, G. E., Calvin, D. C., Dawson, T. M., Nelson, R. J., Tonegawa, S., & Snyder, S. H. (1998). Ejaculatory abnormalities in mice with targeted disruption of the gene for heme oxygenase-2. Nature Medicine, 4, 84-87. PDF

Demas, G. E., & Nelson, R. J. (1998). Short-day enhancement of immune function is independent of steroid hormones in deer mice (Peromyscus maniculatus). Journal of Comparative Physiology B, 168, 419-426. PDF

Demas, G. E., & Nelson, R. J. (1998). Photoperiod, ambient temperature, and food availability interact to affect reproductive and immune function in adult male deer mice (Peromyscus maniculatus). Journal of Biological Rhythms, 13, 253-262. PDF

Demas, G. E., & Nelson, R. J. (1998). Exogenous melatonin enhances cell-mediated, but not humoral, immune function in adult male deer mice (Peromyscus maniculatus). Journal of Biological Rhythms, 13, 245-252. PDF

Demas, G. E., Johnson, C., & Nelson, R. J. (1998). Social, but not photoperiodic, influences on reproductive function in Peromyscus aztecus. Biology of Reproduction, 58, 385-389. PDF

Demas, G. E., Nelson, R. J., Yarowsky, P., & Kreuger, B. (1998). Impaired spatial working and reference memory in segmental trisomy (Ts65Dn) mice. Behavioural Brain Research, 90, 199-201. PDF

Nelson, R. J., Demas, G. E., & Klein, S. L. (1998). Photoperiodic mediation of seasonal breeding and immune function in rodents: A multi-factorial approach. American Zoologist, 38, 225-236. PDF

Walensky, L. D., Shi, Z. T., Blackshaw, S., DeVries, A. C., Demas, G. E., Gascard, P., Nelson, R. J., Conboy, J. G., Rubin, E. M., Snyder, S. H., & Mohandas, N. (1998). Neurobehavioral deficits in mice lacking the erythrocyte membrane cytoskeletal protein 4.1. Current Biology, 8, 1269-1272. PDF

1997

Demas, G. E., Chefer, V., Talan, M., & Nelson, R. J. (1997). Metabolic costs of mounting an antigen-stimulated antibody response in adult and aged C57BL/6J mice. American Journal of Physiology, 273, R1631-1637. PDF

Demas, G. E., DeVries, A. C., & Nelson, R. J. (1997). Effects of photoperiod and 2-deoxy-D-glucose-induced metabolic stress on immune function in female deer mice (Peromyscus maniculatus). American Journal of Physiology, 272, R1762-1767. PDF

Demas, G. E., Elliason, M. L., Dawson, T. M., Dawson, V. L., Kriegsfeld, L. J., Nelson, R. J., & Snyder, S. H. (1997). Inhibition of neuronal nitric oxide synthase increases aggressive behavior in mice. Molecular Medicine, 3, 610-616. PDF

Demas, G. E., Williams, J. M., & Nelson, R. J. (1997). Amygdala but not hippocampal lesions impair olfactory memory for mate in prairie voles (Microtus ochrogaster). American Journal of Physiology, 273, R1683-1689. PDF

DeVries, A. C., Gerber, J. M., Richardson, H. N., Moffatt, C. A., Demas, G. E. & Nelson, R. J. (1997). Stress affects corticosteroid and immunoglobulin concentrations in male house mice (Mus musculus) and prairie voles (Microtus ochrogaster). Journal of Comparative Biochemistry and Physiology A, 118, 655-663. PDF

Nelson, R. J., & Demas, G. E. (1997). Role of melatonin in mediating seasonal energetic and immunologic adaptations. Brain Research Bulletin, 44, 423-430. PDF

1996

Burnett, A. L., Nelson, R. J., Calvin, D., Liu, J-X., Demas, G. E., Klein, S. L., Kriegsfeld, L. J., Dawson, T. M., & Snyder, S. H. (1996). Nitric oxide-dependent penile erection in mice lacking neuronal nitric oxide synthase. Molecular Medicine, 2, 288-296. PDF

Demas, G. E., Klein, S. L., & Nelson, R. J. (1996). Reproductive and immune responses to photoperiod and melatonin are linked in Peromyscussubspecies. Journal of Comparative Physiology A, 179, 819-825. PDF

Demas, G. E., & Nelson, R. J. (1996). Photoperiod and temperature interact to affect immune parameters in adult male deer mice (Peromyscus maniculatus). Journal of Biological Rhythms, 11, 95-103. PDF

Demas, G. E., Nelson, R. J., Kreuger, B. & Yarowsky, P. J. (1996). Spatial memory deficits in segmental trisomic Ts65Dn mice. Behavioural Brain Research, 81, 85-92. PDF

Nelson, R. J., Asfaw, B., DeVries, A. C., & Demas, G. E. (1996). Reproductive response to photoperiod affects corticosterone and immunoglobulin G levels in prairie voles (Microtus ochrogaster). Canadian Journal of Zoology, 74, 576-581. PDF

Nelson, R. J., & Demas, G. E. (1996). Seasonal changes in immune function. Quarterly Review of Biology, 71, 511-548. PDF

Nelson, R. J., Fine, J. B., Demas, G. E., & Moffatt, C. A. (1996). Photoperiod and population density interact to affect reproductive and immune function in male prairie voles. American Journal of Physiology, 270, R571-577. PDF

1995

Demas, G. E., & Brown, M. F. (1995). Honey bees are predisposed to win-shift but can learn to win-stay. Animal Behaviour, 50, 1041-1045. PDF

Nelson, R. J., Demas, G. E., Huang, P. L., Fishman, M. C., Dawson, V. L., Dawson, T. M., & Snyder, S. H. (1995). Behavioural abnormalities in male mice lacking neuronal nitric oxide synthase. Nature, 378, 383-386. PDF

Nelson, R. J., Demas, G. E., Klein, S. L., & Kriegsfeld, L. J. (1995). The influence of season, photoperiod and pineal melatonin on immune function. Journal of Pineal Research, 9, 149-165. PDF

1994

Brown, M. F., & Demas, G. E. (1994). Evidence for spatial working memory in honey bees (Apismellifera). Journal of Comparative Psychology, 108, 344-352. PDF

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