*Click on PDF links below to download.
(57) Shankar A, Deal CK, McCahon S, Callegari K, Seitz T, Yan L, Drown DM, Williams CT (2024) SAD rats: Effects of short photoperiod and carbohydrate consumption on sleep, liver steatosis, and the gut microbiome in diurnal grass rats. Chronobiology International 41: 93-104
(56) Chmura HE, Duncan C, Burrell G, Barnes BM, Buck CL, Williams CT (2023) Climate change is altering the physiology and phenology of an arctic hibernator. Science 380: 846-849 [Full Text]
(55) Johnson DL, Henderson MT, Franke A, Swan GJF, McDonald RA, Anderson DL, Booms TL, Williams CT (2023) TDFcam: A method for estimating stable isotope trophic discrimination in wild populations. Ecology and Evolution 13: e9079 [PDF]
(54) Aubry LM, Williams CT (2022) Vertebrate phenological plasticity: from molecular mechanisms to ecological and evolutionary implications. Integrative and Comparative Biology 62: 958-971 [PDF]
(53) Chmura HE, Duncan C, Saer B, Moore JT, Barnes BM, Buck CL, Loudon ASI, Williams CT (2022) Effects of spring warming on seasonal neuroendocrinology and activation of the reproductive axis in hibernating arctic ground squirrels. Integrative and Comparative Biology 62: 1012-1021 [PDF]
(52) Glass TW, Breed GA, Laird CR, Magoon AJ, Robards MD, Williams CT, Kielland K (2022) Terrain features and architecture of wolverine (Gulo gulo) resting burrows and reproductive dens on Arctic Tundra. Arctic 75: 291-299 [PDF]
(51) Williams CT, Chmura HE, Deal CK, Wilsterman K (2022) Sex-differences in phenology: a Tinbergenian perspective. Integrative and Comparative Biology 62: 980-997 [PDF]
(50) Chmura HE, Williams CT (2022) A cross-taxonomic perspective on the integration of temperature cues in vertebrate seasonal neuroendocrine pathways. Hormones and Behavior 144: 105215 [PDF]
(49) Chmura HE, Duncan C, Saer B, Moore JT, Barnes BM, Buck CL, Christian HC, Loudon ASI, Williams CT (2022) Hypothalamic remodeling of thyroid hormone signaling during hibernation in the arctic ground squirrel. Communications Biology 5: 492. [PDF]
(48) Johnson DL, Henderson MT, Anderson DL, Booms TL, Williams CT (2022) Isotopic niche partitioning and individual specialization in an Arctic raptor guild. Oecologia 198: 1073-1084. [PDF]
(47) Wilbur SM, Deane CE, Breed GA, Buck CL, Williams CT, Barnes (2022) Survival estimates of free-living ground squirrels: effects of sex and biologging. Canadian Journal of Zoology 100: 251-260. [PDF]
(46) Glass TW, Breed GA, Robards MD, Williams CT, Kielland K (2021) Trade-off between predation risk and behavioral thermoregulation drives resting behavior in a cold-adapted mesocarnivore. Animal Behaviour 175: 163-175 [PDF]
(45) Shankar A, Williams CT (2021) The darkness and the light: diurnal rodent models for seasonal affective disorder. Disease Models & Mechanisms 14: 047217 [PDF]
(44) Glass TW, Breed GA, Iwahana G, Robards MD, Williams CT Kielland K (2021) Permafrost ice caves: An unrecognized microhabitat for Arctic wildlife. Ecology e03276 [PDF]
(43) Frare C, Williams CT, Drew KL (2021) Thermoregulation in hibernating mammals: the role of thyroid hormone systems. Molecular and Cellular Endocrinology 519: 111054 [PDF]
(42) Johnson DL, Henderson MT, Anderson DL, Booms TL, Williams CT (2020) Bayesian stable isotope mixing models effectively characterize the diet of an Arctic raptor. Journal of Animal Ecology 89: 2972-2985 [PDF]
(41) Chmura HE, Zhang VY, Wilbur SM, Barnes BM, Buck CL, Williams CT (2020) Plasticity and repeatability of activity patterns in free-living arctic ground squirrels. Animal Behaviour 169: 81-91 [PDF]
(40) Glass TW, Breed GA, Robards MD, Williams CT, Kielland K (2020) Accounting for unknown behaviors of free-living animals in accelerometer-based classification models: demonstration on a wide-ranging mesopredator. Ecological Informatics 60: 101152 [PDF]
(39) Zhang VY, Williams CT, Palme R, Buck CL (2020) Glucocorticoids and activity in free-living arctic ground squirrels: interrelationships between weather, body condition, and reproduction. Hormones and Behavior 125: 104818 [PDF]
(38) Wilbur SM, Barnes BM, Kitaysky AS, Williams CT (2019) Tissue-specific telomere dynamics in hibernating arctic ground squirrels (Urocitellus parryii). Journal of Experimental Biology 222: 204925 [PDF]
(37) Zhang VY, Williams CT, Theimer TC, Buck CL (2019) Reproductive and environmental drivers of time and activity budgets of striped skunks. Integrative Organismal Biology 1: OBZ013 [PDF]
(36) Williams CT, Chmura HE, Zhang VY, Dillon D, Wilsterman K, Barnes BM, Buck CL (2019) Environmental heterogeneity affects seasonal variation in thyroid hormone physiology of free-living arctic ground squirrels. Canadian Journal of Zoology 97:983-980 [PDF]
(35) Wishart AE, Williams CT, McAdam AG, Boutin S, Dantzer B, Humphries MM, Coltman DW, Lane JE (2018) Is biasing offspring sex ratio adaptive? A test of Fisher's principle across multiple generations of a wild mammal in a fluctuating environment. Proceedings of the Royal Society B 285: 20181251 [PDF]
(34) Chmura H, Glass T, Williams CT (2018) Biologging physiological and ecological responses to climatic variation: new tools for the climate change era. Frontiers in Ecology and Evolution 6: 92 doi: 10.3389/fevo.2018.00092 [PDF]
(33) Lane JE, McAdam AG, McFarlane E, Williams CT, Humphries MM, Coltman D, Gorrell J, Boutin S (2018) Phenological shifts in North American red squirrels: disentangling the roles of phenotypic plasticity and microevolution. Journal of Evolutionary Biology 31: 810-821 [PDF]
(32) Williams CT, Buck CL, Sheriff MJ, Richter M, Richter MM, Krause JS, Barnes BM (2017) Sex-dependent phenological plasticity in an arctic hibernator. American Naturalist 190: 854-859 [PDF]
(31) Williams CT, Klaassen M, Barnes BM, Buck CL, Arnold W, Giroud S, Vetter S, Ruf T (2017) Seasonal reproductive tactics: Annual timing and the capital to income breeder continuum. Philosophical Transactions of the Royal Society 372: 20160250 [PDF]
(30) Williams CT, Barnes BM, Yan L, Buck CL (2017) Entraining to the polar day: circadian rhythms in arctic ground squirrels. Journal of Experimental Biology 220: 3095-3102 [PDF]
(29) Ikeno T, Williams CT, Buck CL, Barnes BM, Yan L (2017) Clock gene expression in the suprachiasmatic nucleus of hibernating arctic ground squirrels. Journal of Biological Rhythms 32: 246-256 [PDF]
(28) Lee TN, Richter MR, Williams CT, Tøien Ø, Barnes BM, O'Brien DM, Buck CL (2017) Stable isotope analysis of CO2 in breath indicates metabolic fuel shifts in torpid arctic ground squirrels. Comparative Biochemistry and Physiology A 209: 10-15 [PDF]
(27) Williams CT, Radonich M, Barnes BM, Buck CL (2017) Seasonal loss and resumption of circadian rhythms in hibernating arctic ground squirrels. Journal of Comparative Physiology B 187: 693-793 [PDF]
(26) Theimer TC, Williams CT, Johnson SR, Gilbert AT, Bergman DL, Buck CL (2017) Den use and heterothermy during winter in free-living, suburban, striped skunks. Journal of Mammalogy 98: 867-873 [PDF]
(25) Williams CT, Wilsterman K, Zhang V, Moore J, Barnes BM, Buck CL (2016) The secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity. Royal Society Open Science 3: 160404 [PDF] -featured in 'Outside JEB' Journal of Experimental Biology-
(24) Williams CT, Barnes BM, Buck CL (2016) Integrating physiology, behavior and energetics: biologging in a free-living arctic hibernator. Comparative Biochemistry and Physiology A 202: 53-62 [PDF]
(23) Wilsterman K, Buck CL, Barnes BM, Williams CT (2015) Energy regulation in context: free-living female arctic ground squirrels modulate the relationship between thyroid hormones and activity among life-history stages. Hormones and Behavior 75: 111-119 [PDF]
(22) Williams CT, Barnes BM, Buck CL (2015) Persistence, entrainment, and function of circadian rhythms in polar vertebrates. Physiology 30: 86-96 [PDF] -invited review- cover article-
(21) Richter MM, Williams CT, Lee TN, Tøien Ø, Florant GL, Barnes BM, Buck CL (2015) Thermogenic capacity at sub-zero temperatures: how low can a hibernator go? Physiological and Biochemical Zoology 88: 81-89 [PDF]
(20) Williams CT, Wilsterman K, Kelley AD, Breton AR, Stark H, Humphries MM, McAdam AG, Barnes BM, Boutin S, Buck CL (2014) Light loggers reveal weather-driven changes in the daily activity patterns of arboreal and semi-fossorial rodents. Journal of Mammalogy 95: 1230-1239 [PDF]
(19) Williams CT, Lane JE, Humphries MM, McAdam AG, Boutin S (2014) Reproductive phenology of a food-hoarding mast-seed consumer: resource- and density-dependent benefits of early breeding in red squirrels. Oecologia 174: 777-788 [PDF]
(18) Williams CT, Barnes BM, Kenagy GJ, Buck CL (2014) Phenology of hibernation and reproduction in squirrels: integration of environmental cues with endogenous programming. Journal of Zoology 292: 112-124 [PDF] -invited review-
(17) LaMontagne JM, Williams CT, Donald JL, Humphries MM, McAdam AG, Boutin S (2013) Linking intraspecific variation in territory size, cone supply, and survival of North American red squirrels. Journal of Mammalogy 94: 1048-1058 [PDF]
(16) Williams CT, Gorrell JC, Lane JE, McAdam AG, Humphries MM, Boutin S (2013) Communal nesting in an 'asocial' mammal: social thermoregulation among spatially dispersed kin. Behavioral Ecology and Sociobiology 67: 757-763 [PDF]
(15) Williams CT, Barnes BM, Buck CL (2012) Daily body temperature rhythms persist under the midnight sun but are absent during hibernation in free-living arctic ground squirrels. Biology Letters 8: 31-34 [PDF]
(14) Williams CT, Barnes BM, Richter M, Buck CL (2012) Hibernation and circadian rhythms of body temperature in free-living arctic ground squirrels. Physiological and Biochemical Zoology 85: 397-404. [PDF] -cover article-
(13) Sheriff MJ, Williams CT, Kenagy GJ, Buck CL, Barnes BM (2012) Thermoregulatory changes anticipate hibernation onset by 45 days: data from free-living arctic ground squirrels. Journal of Comparative Physiology B 182: 841-847 [PDF]
(12) Williams CT, Sheriff MJ, Kohl F, Barnes BM, Buck CL (2012) Interrelationships among timing of hibernation, reproduction, and warming soil in free-living female arctic ground squirrels. Pages 63-72 in: Living in a seasonal world: thermoregulatory and metabolic adaptations (Ruf T, et al. eds) Springer, Heidelberg DOI: 10.1007/978-3-642-28678-0_6 [PDF]
(11) Williams CT, Goropashnaya AV, Buck CL, Fedorov VB, Kohl, F, Lee TN, Barnes BM (2011) Hibernating above the permafrost: effects of ambient temperature and season on expression of metabolic genes in liver and brown adipose tissue of arctic ground squirrels. Journal of Experimental Biology 214: 1300-1306 [PDF]
(10) Williams CT, Sheriff MJ, Schmutz J, Kohl F, Tøien Ø, Buck CL, Barnes BM (2011) Data logging of body temperatures provides precise information on phenology of reproductive events in an arctic hibernator. Journal of Comparative Physiology B 181:1101-1109 [PDF]
(9) Williams CT, Buck CL (2010) Using fatty acid signatures as dietary tracers in seabird trophic ecology: theory, application and limitations. Journal of Ornithology 151:531–543 [PDF]
(8) Williams CT, Buck CL (2010) Spatial and temporal variation in tufted puffin Fratercula cirrhata nestling diet quality and growth rates. Marine Ornithology 38: 41-48 [PDF]
(7) Williams CT, Iverson SJ, Buck CL (2009) The effects of diet and caloric restriction on adipose tissue fatty acid signatures of tufted puffin (Fratercula cirrhata) nestlings. Journal of Comparative Physiology B 179: 711-720 [PDF]
(6) Williams CT, Kitaysky AS, Kettle AB, Buck CL (2008) Corticosterone levels vary with breeding stage, body condition index, and reproductive performance in tufted puffins. General and Comparative Endocrinology 158: 29-35 [PDF]
(5) Williams CT, Iverson SJ, Buck CL (2008) Stable isotopes and fatty acid signatures reveal age and stage-dependent foraging niches in tufted puffins. Marine Ecology Progress Series 363: 287-298 [PDF]
(4) Williams CT, Kitaysky AS, Buck CL (2008) Food-restricted tufted puffin (Fratercula cirrhata) nestlings increase begging behaviour without modulating total or free corticosterone. Journal of Ornithology 149: 277-283 [PDF]
(3) Williams CT, Buck CL, Sears J, Kitaysky AS (2007) Effects of nutritional restriction on nitrogen and carbon stable isotopes in growing seabirds. Oecologia 153: 11-18. [PDF]
(2) Williams CT, Kildaw SD, Buck CL (2007) Sex-specific differences in body condition indices and seasonal mass loss in tufted puffins. Journal of Field Ornithology 78: 369-378. [PDF]
(1) Whidden SE, Williams CT, Breton AR, Buck, CL (2007) Effects of transmitters on tufted puffin reproductive success. Journal of Field Ornithology 78: 206-212 [PDF]
(57) Shankar A, Deal CK, McCahon S, Callegari K, Seitz T, Yan L, Drown DM, Williams CT (2024) SAD rats: Effects of short photoperiod and carbohydrate consumption on sleep, liver steatosis, and the gut microbiome in diurnal grass rats. Chronobiology International 41: 93-104
(56) Chmura HE, Duncan C, Burrell G, Barnes BM, Buck CL, Williams CT (2023) Climate change is altering the physiology and phenology of an arctic hibernator. Science 380: 846-849 [Full Text]
(55) Johnson DL, Henderson MT, Franke A, Swan GJF, McDonald RA, Anderson DL, Booms TL, Williams CT (2023) TDFcam: A method for estimating stable isotope trophic discrimination in wild populations. Ecology and Evolution 13: e9079 [PDF]
(54) Aubry LM, Williams CT (2022) Vertebrate phenological plasticity: from molecular mechanisms to ecological and evolutionary implications. Integrative and Comparative Biology 62: 958-971 [PDF]
(53) Chmura HE, Duncan C, Saer B, Moore JT, Barnes BM, Buck CL, Loudon ASI, Williams CT (2022) Effects of spring warming on seasonal neuroendocrinology and activation of the reproductive axis in hibernating arctic ground squirrels. Integrative and Comparative Biology 62: 1012-1021 [PDF]
(52) Glass TW, Breed GA, Laird CR, Magoon AJ, Robards MD, Williams CT, Kielland K (2022) Terrain features and architecture of wolverine (Gulo gulo) resting burrows and reproductive dens on Arctic Tundra. Arctic 75: 291-299 [PDF]
(51) Williams CT, Chmura HE, Deal CK, Wilsterman K (2022) Sex-differences in phenology: a Tinbergenian perspective. Integrative and Comparative Biology 62: 980-997 [PDF]
(50) Chmura HE, Williams CT (2022) A cross-taxonomic perspective on the integration of temperature cues in vertebrate seasonal neuroendocrine pathways. Hormones and Behavior 144: 105215 [PDF]
(49) Chmura HE, Duncan C, Saer B, Moore JT, Barnes BM, Buck CL, Christian HC, Loudon ASI, Williams CT (2022) Hypothalamic remodeling of thyroid hormone signaling during hibernation in the arctic ground squirrel. Communications Biology 5: 492. [PDF]
(48) Johnson DL, Henderson MT, Anderson DL, Booms TL, Williams CT (2022) Isotopic niche partitioning and individual specialization in an Arctic raptor guild. Oecologia 198: 1073-1084. [PDF]
(47) Wilbur SM, Deane CE, Breed GA, Buck CL, Williams CT, Barnes (2022) Survival estimates of free-living ground squirrels: effects of sex and biologging. Canadian Journal of Zoology 100: 251-260. [PDF]
(46) Glass TW, Breed GA, Robards MD, Williams CT, Kielland K (2021) Trade-off between predation risk and behavioral thermoregulation drives resting behavior in a cold-adapted mesocarnivore. Animal Behaviour 175: 163-175 [PDF]
(45) Shankar A, Williams CT (2021) The darkness and the light: diurnal rodent models for seasonal affective disorder. Disease Models & Mechanisms 14: 047217 [PDF]
(44) Glass TW, Breed GA, Iwahana G, Robards MD, Williams CT Kielland K (2021) Permafrost ice caves: An unrecognized microhabitat for Arctic wildlife. Ecology e03276 [PDF]
(43) Frare C, Williams CT, Drew KL (2021) Thermoregulation in hibernating mammals: the role of thyroid hormone systems. Molecular and Cellular Endocrinology 519: 111054 [PDF]
(42) Johnson DL, Henderson MT, Anderson DL, Booms TL, Williams CT (2020) Bayesian stable isotope mixing models effectively characterize the diet of an Arctic raptor. Journal of Animal Ecology 89: 2972-2985 [PDF]
(41) Chmura HE, Zhang VY, Wilbur SM, Barnes BM, Buck CL, Williams CT (2020) Plasticity and repeatability of activity patterns in free-living arctic ground squirrels. Animal Behaviour 169: 81-91 [PDF]
(40) Glass TW, Breed GA, Robards MD, Williams CT, Kielland K (2020) Accounting for unknown behaviors of free-living animals in accelerometer-based classification models: demonstration on a wide-ranging mesopredator. Ecological Informatics 60: 101152 [PDF]
(39) Zhang VY, Williams CT, Palme R, Buck CL (2020) Glucocorticoids and activity in free-living arctic ground squirrels: interrelationships between weather, body condition, and reproduction. Hormones and Behavior 125: 104818 [PDF]
(38) Wilbur SM, Barnes BM, Kitaysky AS, Williams CT (2019) Tissue-specific telomere dynamics in hibernating arctic ground squirrels (Urocitellus parryii). Journal of Experimental Biology 222: 204925 [PDF]
(37) Zhang VY, Williams CT, Theimer TC, Buck CL (2019) Reproductive and environmental drivers of time and activity budgets of striped skunks. Integrative Organismal Biology 1: OBZ013 [PDF]
(36) Williams CT, Chmura HE, Zhang VY, Dillon D, Wilsterman K, Barnes BM, Buck CL (2019) Environmental heterogeneity affects seasonal variation in thyroid hormone physiology of free-living arctic ground squirrels. Canadian Journal of Zoology 97:983-980 [PDF]
(35) Wishart AE, Williams CT, McAdam AG, Boutin S, Dantzer B, Humphries MM, Coltman DW, Lane JE (2018) Is biasing offspring sex ratio adaptive? A test of Fisher's principle across multiple generations of a wild mammal in a fluctuating environment. Proceedings of the Royal Society B 285: 20181251 [PDF]
(34) Chmura H, Glass T, Williams CT (2018) Biologging physiological and ecological responses to climatic variation: new tools for the climate change era. Frontiers in Ecology and Evolution 6: 92 doi: 10.3389/fevo.2018.00092 [PDF]
(33) Lane JE, McAdam AG, McFarlane E, Williams CT, Humphries MM, Coltman D, Gorrell J, Boutin S (2018) Phenological shifts in North American red squirrels: disentangling the roles of phenotypic plasticity and microevolution. Journal of Evolutionary Biology 31: 810-821 [PDF]
(32) Williams CT, Buck CL, Sheriff MJ, Richter M, Richter MM, Krause JS, Barnes BM (2017) Sex-dependent phenological plasticity in an arctic hibernator. American Naturalist 190: 854-859 [PDF]
(31) Williams CT, Klaassen M, Barnes BM, Buck CL, Arnold W, Giroud S, Vetter S, Ruf T (2017) Seasonal reproductive tactics: Annual timing and the capital to income breeder continuum. Philosophical Transactions of the Royal Society 372: 20160250 [PDF]
(30) Williams CT, Barnes BM, Yan L, Buck CL (2017) Entraining to the polar day: circadian rhythms in arctic ground squirrels. Journal of Experimental Biology 220: 3095-3102 [PDF]
(29) Ikeno T, Williams CT, Buck CL, Barnes BM, Yan L (2017) Clock gene expression in the suprachiasmatic nucleus of hibernating arctic ground squirrels. Journal of Biological Rhythms 32: 246-256 [PDF]
(28) Lee TN, Richter MR, Williams CT, Tøien Ø, Barnes BM, O'Brien DM, Buck CL (2017) Stable isotope analysis of CO2 in breath indicates metabolic fuel shifts in torpid arctic ground squirrels. Comparative Biochemistry and Physiology A 209: 10-15 [PDF]
(27) Williams CT, Radonich M, Barnes BM, Buck CL (2017) Seasonal loss and resumption of circadian rhythms in hibernating arctic ground squirrels. Journal of Comparative Physiology B 187: 693-793 [PDF]
(26) Theimer TC, Williams CT, Johnson SR, Gilbert AT, Bergman DL, Buck CL (2017) Den use and heterothermy during winter in free-living, suburban, striped skunks. Journal of Mammalogy 98: 867-873 [PDF]
(25) Williams CT, Wilsterman K, Zhang V, Moore J, Barnes BM, Buck CL (2016) The secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity. Royal Society Open Science 3: 160404 [PDF] -featured in 'Outside JEB' Journal of Experimental Biology-
(24) Williams CT, Barnes BM, Buck CL (2016) Integrating physiology, behavior and energetics: biologging in a free-living arctic hibernator. Comparative Biochemistry and Physiology A 202: 53-62 [PDF]
(23) Wilsterman K, Buck CL, Barnes BM, Williams CT (2015) Energy regulation in context: free-living female arctic ground squirrels modulate the relationship between thyroid hormones and activity among life-history stages. Hormones and Behavior 75: 111-119 [PDF]
(22) Williams CT, Barnes BM, Buck CL (2015) Persistence, entrainment, and function of circadian rhythms in polar vertebrates. Physiology 30: 86-96 [PDF] -invited review- cover article-
(21) Richter MM, Williams CT, Lee TN, Tøien Ø, Florant GL, Barnes BM, Buck CL (2015) Thermogenic capacity at sub-zero temperatures: how low can a hibernator go? Physiological and Biochemical Zoology 88: 81-89 [PDF]
(20) Williams CT, Wilsterman K, Kelley AD, Breton AR, Stark H, Humphries MM, McAdam AG, Barnes BM, Boutin S, Buck CL (2014) Light loggers reveal weather-driven changes in the daily activity patterns of arboreal and semi-fossorial rodents. Journal of Mammalogy 95: 1230-1239 [PDF]
(19) Williams CT, Lane JE, Humphries MM, McAdam AG, Boutin S (2014) Reproductive phenology of a food-hoarding mast-seed consumer: resource- and density-dependent benefits of early breeding in red squirrels. Oecologia 174: 777-788 [PDF]
(18) Williams CT, Barnes BM, Kenagy GJ, Buck CL (2014) Phenology of hibernation and reproduction in squirrels: integration of environmental cues with endogenous programming. Journal of Zoology 292: 112-124 [PDF] -invited review-
(17) LaMontagne JM, Williams CT, Donald JL, Humphries MM, McAdam AG, Boutin S (2013) Linking intraspecific variation in territory size, cone supply, and survival of North American red squirrels. Journal of Mammalogy 94: 1048-1058 [PDF]
(16) Williams CT, Gorrell JC, Lane JE, McAdam AG, Humphries MM, Boutin S (2013) Communal nesting in an 'asocial' mammal: social thermoregulation among spatially dispersed kin. Behavioral Ecology and Sociobiology 67: 757-763 [PDF]
(15) Williams CT, Barnes BM, Buck CL (2012) Daily body temperature rhythms persist under the midnight sun but are absent during hibernation in free-living arctic ground squirrels. Biology Letters 8: 31-34 [PDF]
(14) Williams CT, Barnes BM, Richter M, Buck CL (2012) Hibernation and circadian rhythms of body temperature in free-living arctic ground squirrels. Physiological and Biochemical Zoology 85: 397-404. [PDF] -cover article-
(13) Sheriff MJ, Williams CT, Kenagy GJ, Buck CL, Barnes BM (2012) Thermoregulatory changes anticipate hibernation onset by 45 days: data from free-living arctic ground squirrels. Journal of Comparative Physiology B 182: 841-847 [PDF]
(12) Williams CT, Sheriff MJ, Kohl F, Barnes BM, Buck CL (2012) Interrelationships among timing of hibernation, reproduction, and warming soil in free-living female arctic ground squirrels. Pages 63-72 in: Living in a seasonal world: thermoregulatory and metabolic adaptations (Ruf T, et al. eds) Springer, Heidelberg DOI: 10.1007/978-3-642-28678-0_6 [PDF]
(11) Williams CT, Goropashnaya AV, Buck CL, Fedorov VB, Kohl, F, Lee TN, Barnes BM (2011) Hibernating above the permafrost: effects of ambient temperature and season on expression of metabolic genes in liver and brown adipose tissue of arctic ground squirrels. Journal of Experimental Biology 214: 1300-1306 [PDF]
(10) Williams CT, Sheriff MJ, Schmutz J, Kohl F, Tøien Ø, Buck CL, Barnes BM (2011) Data logging of body temperatures provides precise information on phenology of reproductive events in an arctic hibernator. Journal of Comparative Physiology B 181:1101-1109 [PDF]
(9) Williams CT, Buck CL (2010) Using fatty acid signatures as dietary tracers in seabird trophic ecology: theory, application and limitations. Journal of Ornithology 151:531–543 [PDF]
(8) Williams CT, Buck CL (2010) Spatial and temporal variation in tufted puffin Fratercula cirrhata nestling diet quality and growth rates. Marine Ornithology 38: 41-48 [PDF]
(7) Williams CT, Iverson SJ, Buck CL (2009) The effects of diet and caloric restriction on adipose tissue fatty acid signatures of tufted puffin (Fratercula cirrhata) nestlings. Journal of Comparative Physiology B 179: 711-720 [PDF]
(6) Williams CT, Kitaysky AS, Kettle AB, Buck CL (2008) Corticosterone levels vary with breeding stage, body condition index, and reproductive performance in tufted puffins. General and Comparative Endocrinology 158: 29-35 [PDF]
(5) Williams CT, Iverson SJ, Buck CL (2008) Stable isotopes and fatty acid signatures reveal age and stage-dependent foraging niches in tufted puffins. Marine Ecology Progress Series 363: 287-298 [PDF]
(4) Williams CT, Kitaysky AS, Buck CL (2008) Food-restricted tufted puffin (Fratercula cirrhata) nestlings increase begging behaviour without modulating total or free corticosterone. Journal of Ornithology 149: 277-283 [PDF]
(3) Williams CT, Buck CL, Sears J, Kitaysky AS (2007) Effects of nutritional restriction on nitrogen and carbon stable isotopes in growing seabirds. Oecologia 153: 11-18. [PDF]
(2) Williams CT, Kildaw SD, Buck CL (2007) Sex-specific differences in body condition indices and seasonal mass loss in tufted puffins. Journal of Field Ornithology 78: 369-378. [PDF]
(1) Whidden SE, Williams CT, Breton AR, Buck, CL (2007) Effects of transmitters on tufted puffin reproductive success. Journal of Field Ornithology 78: 206-212 [PDF]