Hahn, Thomas - University of California, Davis - College of Biological Sciences

研究领域

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.

近期论文

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Hahn, T., and M. Denny. 1989. Tenacity-mediated selective predation by oystercatchers on intertidal limpets and its role in maintaining habitat partitioning by "Collisella" scabra and Lottia digitalis. Marine Ecology Progress Series 53: 1-10. Wingfield, J. C., T. P. Hahn, R. N. Levin, and P. Honey. 1992. Environmental predictability and control of gonadal cycles in birds. Journal of Experimental Zoology 261: 214-231. Hahn, T. P., J. Swingle, J. C. Wingfield, and M. Ramenofsky. 1992. Adjustments of the prebasic molt schedule in birds. Ornis Scandinavica 23: 314-321. Wingfield, J. C., T. P. Hahn, and D. Doak. 1993. Integration of environmental factors regulating transitions of physiological state, morphology and behaviour. pp. 111-122 In: Avian Endocrinology (P. Sharp, ed.). Journal of Endocrinology Ltd, Bristol. 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 Cassin s 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.