Thomas P. Hahn
Professor
tphahn@ucdavis.edu
Neurobiology, Physiology and Behavior
Office
102 Animal Communication Lab
530-752-8531
Degrees:
1993
PhD
University of Washington
(Zoology)
1985
MS
Stanford University
(Biological Sciences)
1984
BS
Stanford University
(Biological Sciences)
Research Interests:
Interfaces of behavior, endocrine and neuroendocrine physiology, ecology, and evolution. Specifically environmental regulation of avian annual schedules of reproduction, plumage molt and migration; scheduling tradeoffs between current reproduction and survival (future reproduction); evolution of mechanisms of responses to environmental cues such as day length, food, social factors; effects of unpredictable environmental events on behavior and physiology of free-living birds.
Avian communication, especially use of heterospecific mimicry in song, and learned non-song vocalizations.
Department and Center Affiliations:
Department of Neurobiology, Physiology and Behavior
Professional Societies:
Society for Integrative and Comparative Biology
Society for Behavioral Neuroendocrinology
CBS Graduate Group Affiliations:
Animal Behavior
Specialties / Focus:
Animal Behavior
Behavior Ecology and Sociobiology
Physiology and Behavior
Graduate Groups not Housed in CBS:
Avian Sciences
Ecology Graduate Group
Publications:
Last updated 10/27/2012
Wingfield, J. C., and T. P. Hahn. 1994. Testosterone and territorial behavior in sedentary and migratory sparrows. Animal Behavior 47: 77-89.
Hahn, T. P. 1995. Integration of photoperiodic and food cues to time changes in reproductive physiology by an opportunistic breeder, the red crossbill, Loxia curvirostra (Aves: Carduelinae). Journal of Experimental Zoology 272: 213-226.
Hahn, T. P., J. C. Wingfield, R. Mullen, and P. J. Deviche. 1995. Endocrine bases of spatial and temporal opportunism in arctic-breeding birds. American Zoologist 35: 259-273.
Hahn, T. P. 1996. Cassin's Finch. (Carpodacus cassinii). In The Birds of North America, No. 240 (A. Poole and F. Gill, eds.). The Academy of Natural Sciences, Philadelphia; The American Ornithologists' Union, Washington, D. C.
Hahn, T. P., T. Boswell, J. C. Wingfield, and G. F. Ball. 1997. Temporal flexibility in avian reproduction: Patterns and mechanisms. Current Ornithology 14: 39-80. V. Nolan, Jr., E. D. Ketterson, and C. F. Thompson (eds.), Plenum, New York and London.
Hahn,T.P. 1998. Reproductive seasonality in an opportunistic breeder, the Red Crossbill, Loxia curvirostra. Ecology 79: 2365-2375.
Harbison HE, Nelson DA and TP Hahn. 1999. Long-term persistence of song dialects in the mountain white-crowned sparrow. Condor. 101:133-148.
MacDougall-Shackleton, S. A., E. A. MacDougall-Shackleton, and T. P. Hahn. 2001. Physiological and behavioural responses of female mountain white-crowned sparrows to natal- and foreign-dialect songs. Canadian Journal of Zoology 79: 325-333.
MacDougall-Shackleton, S. A, P. J. Deviche, R. D. Crain, G. F. Ball, and T. P. Hahn. 2001. Seasonal changes in brain GnRH immunoreactivity and song-control nuclei volumes in an opportunistically breeding songbird. Brain, Behavior and Evolution 58: 38-48.
MacDougall-Shackleton, E. A., E. P. Derryberry, and T. P. Hahn. 2002. Non-local male mountain white-crowned sparrows have lower paternity and higher parasite loads than males singing local dialect. Behavioral Ecology 13: 682-689.
Breuner, C. W. and T. P. Hahn. 2003. Integrating stress physiology, environmental change, and behavior in free-living sparrows. Hormones and Behavior 43: 115-123.
Sewall, K. B, T. R. Kelsey, and T. P. Hahn. 2004. Discrete variants of evening grosbeak flight calls. Condor 106: 161-165.
Hahn, T. P., M. E. Pereyra, S. M. Sharbaugh and G. E. Bentley. 2004. Physiological responses to photoperiod in three cardueline finch species. General and Comparative Endocrinology 137: 99-108.
Hahn, T. P., K. W. Sockman, C. W. Breuner and M. L. Morton. 2004. Facultative altitudinal movements by mountain white-crowned sparrows, Zonotrichia leucophrys oriantha, in the Sierra Nevada. Auk 121: 1269-1281.
MacDougall-Shackleton, S. A., G. F. Ball, E. Edmonds, R. Sul, and T. P. Hahn. 2005. Age and sex related variation in song-control regions in Cassins finches, Carpodacus cassinii. Brain, Behavior and Evolution 65: 262-267.
Sockman, K. W., K. B. Sewall, G. F. Ball, and T. P. Hahn. 2005. Modulation of male song effort in response to female reproductive competence: The economy of a courtship decision in the Cassin's finch. Biology Letters 1: 34-37.
MacDougall-Shackleton, E. A., E. P. Derryberry, J. Foufopoulos, A. P. Dobson, and T. P. Hahn. 2005. Parasite-mediated heterozygote advantage in an outbred songbird population. Biology Letters 1: 105-107.
Pereyra, M. E., S. M. Sharbaugh, and T. P. Hahn. 2005. Interspecific variation in photo-induced GnRH plasticity among nomadic cardueline finches. Brain Behavior and Evolution 66: 35-49.
MacDougall-Shackleton, S. A., M. E. Pereyra, and T. P. Hahn. 2005. GnRH, photorefractoriness, and breeding schedules of cardueline finches. Pp. 97-110 in Functional Avian Endocrinology, A. Dawson and P. J. Sharp, eds. Narosa Publishing House, New Delhi, India.
Hahn, T. P., M. E. Pereyra, M. Katti, G. M. Ward, and S. A. MacDougall-Shackleton. 2005. Effects of food availability on the reproductive system. Pp. 167-180 in Functional Avian Endocrinology, A. Dawson and P. J. Sharp, eds. Narosa Publishing House, New Delhi, India.
Goodson, J. L., C. J. Saldanha, T. P. Hahn, and K. K. Soma. 2005. Recent advances in behavioral neuroendocrinology: Insights from studies on birds. Hormones and Behavior 48: 461-473.
MacDougall-Shackleton, S. A., M. Katti, and T. P. Hahn. 2006. Tests of absolute refractoriness in four species of cardueline finch that differ in reproductive schedule. Journal of Experimental Biology 209: 3786-3794.
Lynn, S. E., T. P. Hahn and C. W. Breuner. 2007. Free-living male mountain White-crowned Sparrows exhibit territorial aggression without modulating total or free plasma testosterone. Condor 109: 173-180.
Hahn, T. P. and S. A. MacDougall-Shackleton. 2008. Adaptive specialization, conditional plasticity, and phylogenetic history in the reproductive cue response systems of birds. Philosophical Transactions of the Royal Society B 363: 267-286.
Hahn, T. P., J. M. Cornelius, K. B. Sewall, T. R. Kelsey, M. Hau, and N. Perfito. 2008. Environmental regulation of annual schedules in opportunistically-breeding songbirds: Adaptive specializations, or variations on a theme of white-crowned sparrow? General and Comparative Endocrinology 157: 217-226.
Breuner, C. W., S. H. Patterson, and T. P. Hahn. 2008. In search of relationships between the acute adrenocortical stress response and fitness. General and Comparative Endocrinology 157: 288-295.
Sewall, K. B. and T. P. Hahn. 2009. Social experience modifies behavioural responsiveness to a preferred vocal signal in red crossbills, Loxia curvirostra. Animal Behaviour 77: 123-128.
Hahn, T. P., H. E. Watts, J. M. Cornelius, K. R. Brazeal, and S. A. MacDougall-Shackleton. 2009. Evolution of environmental cue response systems: Adaptive variation in photorefractoriness. General and Comparative Endocrinology 163: 193-200.
MacDougall-Shackleton, S. A., T. J. Stevenson, H. E. Watts, M. E. Pereyra and T. P. Hahn. 2009. The evolution of photoperiod response systems and seasonal GnRH plasticity in birds. Integrative and Comparative Biology 49: 580-589.
Cornelius, J. M., C. W. Breuner and T. P. Hahn. 2010. Under a neighbour's influence: public information affects stress hormones and behaviour of a songbird. Proceedings of the Royal Society B 277: 2399-2404.
Cornelius, J. M., N. Perfito, R. Zann, C. W. Breuner, and T. P. Hahn. 2011. Physiological trade-offs in self-maintenance: Plumage molt and stress physiology in birds. Journal of Experimental Biology 214: 2768-2777.
Stevenson, T. J., T. P. Hahn and G. F. Ball. 2012. Variation in Gonadotropin Releasing-Hormone-1 Gene Expression in the Preoptic Area Predicts Transitions in Seasonal Reproductive State. Journal of Neuroendocrinology 24: 267-274.
Cornelius, J. M., C. W. Breuner and T. P. Hahn. 2012. Coping with the extremes: Stress physiology varies between winter and summer in breeding opportunists. Biology Letters 8: 312-315.
Watts, H. E. and T. P. Hahn. 2012. Non-photoperiodic regulation of reproductive physiology in the flexibly-breeding pine siskin (Spinus pinus). General and Comparative Endocrinology 178: 259-264.
Laboratory Personnel:
Hahn Lab, Animal Communication Lab
Current students and postdocs: Aaron Haiman, (PhD student, Animal Behavior); Kati Brazeal (PhD student, Animal Behavior); Beth Schultz (PhD student, Animal Behavior); Brandi Gartland (Masters student, Avian Sciences); William Rockey (Masters student, Avian Sciences). Jamie Cornelius (postdoc); Lindsay Henderson (postdoc).
Former students and postdocs: Maxine Zylberberg (PhD 2011, Animal Behavior, currently postdoc, California Academy of Sciences);Danielle Brown (PhD 2011, Animal Behavior, currently lecturer, Middle Tennessee State University); Heather Watts (former postdoc, currently Assistant Professor, Loyola Marymount University); Jamie Cornelius (PhD 2009, Animal Behavior, currently postdoc, UC Davis); Rodd Kelsey (PhD 2009, Animal Behavior, currently Avian Ecologist, National Audubon); Shelley Parker (masters 2009, Avian Sciences, currently PhD student, UNC Chapel Hill); Kendra Sewall (PhD 2008, Animal Behavior, currently postdoc, Duke University);Kirsten Sanford (PhD 2006, MCIP, currently free-lance science educator, Bay Area);Marcel Losekoot (MS 2006, Avian Sciences, currently technician, Bodega Marine Lab);Elizabeth MacDougall-Shackleton (PhD 2000, Princeton University, currently associate professor, University of Western Ontario); Scott MacDougall-Shackleton (postdoc, Princeton University, currently associate professor, University of Western Ontario);Maria Pereyra (postdoc, UCD, currently assistant professor, University of Tulsa).
Field Sites:
Tioga Pass, central Sierra Nevada, Mono County, CA, 9941 feet elevation
Crossbill Field Sites: Warner Mountains, Oregon; Jackson Hole, Wyoming
Teaching Interests:
Animal Behavior, Hormones and Behavior, Comparative Vertebrate Reproduction, Comparative Endocrinology, Ornithology
Courses:
NPB
102
Animal Behavior
Winter
NPB
152
Hormones and Behavior
Spring
PSC
123
Hormones and Behavior
Spring