C. Loren Buck


University of Alaska Anchorage
Department of Biological Science
Inetgrated Science Building 202D
3211 Providence Drive
Anchorage AK 99508
phone (907) 786-1367
fax (907) 786-4607
● Environmental Physiology
Comparative Animal Physiology
   (IDeA Network of Biomedical Research Excellence)
University of Alaska Anchorage
   Department of Biological Sciences

Environmental and Natural Resources Institute

University of Alaska Fairbanks

Institute of Arctic Biology


● Hibernation physiology
● Endocrinology
● Metabolic physiology
● B.S. 1992 Biology
   Eastern Montana College, MT
● B.S. 1992 Education
   Eastern Montana College, MT
● Ph.D. 1998 Biology
   University of Alaska Fairbanks, AK
Research Overview
I am a comparative animal physiologist and thus my research covers a range of species and taxa (crabs, fish, birds mammals). Virtually all research projects conducted by my laboratory investigate adaptations of animals to extreme or variable environments. The science I conduct typically contains both a field and laboratory component. Over the years, I have segued from more basic, terrestrial biased investigations, to also include physiological research to applied and basic marine physiology and biomedical physiology.
Current Research Projects
Mechanisms of perchlorate-induced disruption of sexual development. NIH-R01
● Detecting and monitoring changes in the Arctic using stable isotope techniques. A facility that contributes to IPY, NEON and beyond. NSF
1.     Boyer, BB, Ormseth, OA, Buck, L, Nicolson, M, Pellymounter, MA, Barnes, BM, Leptin reduces posthibernation weight gain but does not reduce energy expenditure in arctic ground squirrels. Comp. Biochem. Physiol. 118: 3.
2.     Buck, CL 1998. The physiological ecology of the arctic ground squirrel: energy metabolism, torpor, and behavioral endocrinology. Ph.D. dissertation, University of Alaska Fairbanks, Fairbanks, AK.
3.     Buck, CL & Barnes, BM. 1999. Influence of hibernaculum temperatures on overwinter change in Arctic ground squirrel body condition. Journal of Mammalogy 80(4).
4.     Buck, CL & Barnes, BM. 1999. Annual cycle of body condition and hibernation in free-living arctic ground squirrels. Journal of Mammalogy. 80(2), 430-442.
5.     Buck, CL & Barnes, BM. 2000. Effects of ambient temperature on metabolic rate, respiratory quotient, and torpor in an Arctic hibernator. American Journal of Physiology; Regulatory, Integrative Comparative Physiology. 279: R255-R262.
6.     Barnes, BM & Buck CL. 2000. Hibernation in the extreme: burrow and body temperatures, metabolism, and limits to torpor bout length in arctic ground squirrels In: Life in the Cold (G. Heldmaier & M. Klingenspor eds.) Springer-Verlag Berlin.
7.     Buck, CL & Barnes, BM. 2003. Androgen in Free-living Arctic Ground Squirrels: Seasonal Changes and Influence of Staged Male-Male Aggressive Encounters. Hormones and Behavior. 43: 318-326.
8.     Lane, J.E., Buck, CL and R.M. Brigham. 2003. The bat fauna of southeastern South Dakota. The Prairie Naturalist 35(4): 247-256.
9.     Buck, CL & Jenkins, JL. 2005. Plasma leptin and body composition in post-hibernation thirteen-lined ground squirrels. PSDAS. 84: 295-303.
10. Kildaw, SD, Irons, DB, Nysewander, DR and Buck, CL. 2005. Patterns of colonization and population dynamics of new Black-legged Kittiwake colonies. Marine Ornithology, 33:49-58.
11. Haukenes, AH and Buck, CL. (2006).  Characterization of the osmoregulatory, metabolic, and endocrine stress responses in Pacific halibut following a 30-minute hypoxia stressor and the influence of post-capture handling techniques. Journal of Applied Ichthyology. 22:387-387.
12. Williams, CT and CL Buck. (2007) Tufted Puffins as biological indicators of forage fish availability in the Gulf of Alaska: assessing diets using stable isotopes and fatty acid signature analysis. North Pacific Marine Research Board Final Report. 77pp.
13. Buck, CL, O’Reilly, KM, and SD Kildaw. (2007). Interannual variability of Black-legged Kittiwake Productivity is reflected in baseline plasma corticosterone. General and Comparative Endocrinology. 150:430-436. [PMID: 17161400]
14. Whidden, SE, Williams, CT and CL Buck (2007) Effects of radio transmitters on tufted puffin (Fratercula cirrhata) reproductive success. Journal of Field Ornithology, 78(2) 206-212.
15. Fridinger, R, O’Reilly, KM, Kildaw, SD and CL Buck. (2007) Impact of investigator disturbance on baseline levels of corticosterone of black-legged kittiwake chicks. Journal of Field Ornithology. 78(1):1-7.
16. 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. [PMID: 17406905]
17. Drew, KL, Buck, CL, Barnes, BM Christian, SL, Rasley, BT, & MB Harris. (2007) Central nervous system regulation of mammalian hibernation: implications f:or metabolic suppression and ischemia tolerance. Journal of Neural Chemistry. 102, 1713-1726. [PMID: 17555547]
18. Williams, CT, Kildaw, SD, and CL Buck (2007) Sex specific differences in body condition indices and seasonal mass loss in Tufted Puffins. Journal of Field Ornithology. 78(4): 369-378.
19. Stevens, BG & Buck, CL. (2008) EFH for Blue King Crab Paralithodes platypus Phase 2: Environmental effects on hatching, habitat selection and survival of juvenile crabs North Pacific Marine Research Board Final Report.
20. Breton, AR, Kildaw, SD, Murra, KM, and CL Buck. (2008) Multilevel models reveal no cohort level variation in foraging effort to explain a regime shift in kittiwake (Rissa tridactyla) breeding success.  Ecological Modeling. 212: 233-243.
21. Hanna, SK, Haukenes, AH, Foy, RJ and CL Buck. (2008) Temperature effects on swimming performance and metabolic rate of Pacific cod (Gadus macrocephalus). Journal of Fish Biology.72, 1068-1078.
22. Haukenes, AH, Plante, S, and CL Buck. (2008)Endocrine and morphological characterization of reproductive cycles in wild and captive black rockfish, Sebastes melanops.North American Journal of Aquaculture. 20: 212-218.
23. Brewer, JH, O’Reilly, KM, Kildaw, SD and CL Buck. (2008) Interannual variation in the adrenal responsiveness of black-legged kittiwake chicks (Rissa tridactyla). General and Comparative Endocrinology. 156, 361-368.
24. Hanna, SK, Haukenes, AH, Foy, RJ and CL Buck. (2008) Temperature effects on Pacific cod following exhaustive exercise. Proceedings 24th Wakefield Symposium. Resiliency of gadid stocks to fishing and climate change. 239-250.
25. Williams, CT, Kitaysky, AS and CL Buck. (2008) Food restricted tufted puffin (Fratercula cirrhata) nestlings increase begging behavior without modulating total or free corticosterone. Journal of Ornithology. 149:277-283.
26.Brewer, JH, O’Reilly, KM and CL Buck. (2008) Effects of investigator disturbance on baseline and stress-induced levels of corticosterone concentrations of Black-legged kittiwake chicks (Rissa tridactyla). Journal of Field Ornithology. 79(4) 391-398.
27. Williams, CT, Iverson, SJ and CL Buck. (2008) Stable isotopes and fatty acid signatures reveal age- and stage-dependent foraging niches in tufted puffins. Marine Ecology Progress Series. 363: 287-298.
28. Kildaw, SD, Irons, DB and CL Buck. (2008) Habitat quality and metapopulation dynamics of Black-legged Kittiwakes. Marine Ornithology, 38: 35-45.
29. Williams, CT, Kitaysky, AS, Kettle, AB and Buck, CL (2008) Corticosterone levels of tufted puffins vary with breeding stage, body condition index, and reproductive performance. General and Comparative Endocrinology. 58: 29-35. [PMID: 18547575]
30. Buck, CL, Breton, A, Toien, O, Barnes, BM. (2008) Overwinter body temperature patterns of free-living arctic ground squirrels (Spermophilus parryii). Lovegrove, B.G. and McKechnie, A.E. (eds.) 2008. Hypometabolism in animals: torpor, hibernation and cryobiology. University of KwaZulu-Natal, Pietermaritzburg. 317-326.
31.Stevens, B. G., K. M. Swiney, and C. L. Buck. 2008. Thermal effects on embryo development and hatching for blue king crab Paralithodes platypus held in the laboratory, and a method for predicting dates of hatching. Journal of Shellfish Research. 27(5), 1255-1263.
32. Haukenes, AH, El Majjati, SY, and Buck, CL. (2009) Effects of emersion, temperature and handling on the oxygen consumption of Tanner crabs (Chionoecetes bairdi) Journal of rustacean Biology, 29(1): 91–95.
33. Tapella, F, MC Romero, BG Stevens and CL Buck. (2009) Substrate preferences of blue king crab Paralithodes platypus glaucothoe and first crab redistribution on natural substrates in the laboratory. Journal of Experimental Marine Biology and Ecology 372, 31-35.
34. Karpovich, SA, Toien, O, Buck, CL and BM Barnes (2009) Energetics under Arctic conditions in the arctic ground squirrel. Journal of Comparative Physiology B. 179: 691-700. [PMID 19277682]
35. Lee, TN, Barnes, BM and CL Buck (2009) Body temperature patterns during hibernation in a free-living Alaska marmot (Marmota broweri). Ethology, Ecology and Evolution. 21: 403-413.
36. Williams, CT, Iverson, SA and CL Buck (2009) Dietary restriction affects adipose tissue fatty acid signatures of tufted puffin (Fratercula cirrhata) nestlings. Journal of Comparative Physiology, B.711-720. [PMID: 19350253]
37. Brewer, JH, O’Reilly, KM and CL Buck. (2010) Effect of nestling status and brood size on concentration of corticosterone of free-living kittiwake chicks. General and ComparativeEndocrinology.166, 19-24. [PMID: 19699742]
38. Williams, CT and CL Buck (2010) Using fatty acids as dietary tracers in seabird trophic ecology: theory, application and limitations. Journal of Ornithology. 151:531–543.
39. Romero, MC, Taplella, F, BG Stevens and Buck, CL. (2010) Oxygen consumption in Paralithodes platypus (Crustacea: Decapoda): influences of different stage, temperature and brood care. Journal of Crustacean Biology. 30(3) 393-400.
40. Williams, CT and CL Buck (2010) Spatial and temporal variation in Tufted Puffin Fratercula cirrhata  nestling diet quality and growth rates.  Journal of Marine Ornithology. 38: 41-48.
41. Williams, CT, Goropashnaya, AV, Buck, CL, Fedorov, VB, Kohl,F, Lee, TN* and BM Barnes (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 [PMID: 21430207]
42. Sheriff, MJ, Kenagy, GJ, Richter*, M, Lee, T*, Toien, O, Kohl,F, Buck, CL and BM. Barnes (in press) Phenological variation in annual timing of hibernation and breeding in two nearby populations of arctic ground squirrels. Proceedings of the Royal Society B. [PMID: 21177687]
43. Williams CT, Sheriff MJ, Schmutz JA, Kohl F, Tøien O, Buck CL, Barnes BM. (2011) Data logging of body temperatures provides precise information on phenology of reproductive events in a free-living arctic hibernator. J. Comp Physiol B. (Epub ahead of print) [PMID: 21691770]
44. Au MG, Crowley WF Jr, Buck CL. (2011) Genetic Counseling for isolated GnRH deficiency Mol Cell Endocrinol. 2011 Jun 1. [Epub ahead of print] PMID: 21664415
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