NPB Neurobiology, Physiology & Behavior |
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| Marilyn Ramenofsky |
| Currently at University of Washington, Seattle |
Degrees: |
| Research Interests: My research focuses on the interplay of environmental signals and the physiological and behavioral expressions of the migration life history stage. As migration is the movement to and away from areas where organisms breed, each trip is composed of multiple steps or substages. These trips occur twice yearly and involve sequential development of the neuroendocrine, endocrine, metabolic, and behavioral systems (no name just a few). Progression from one substage to the next is influenced by environmental signals or proximate factors. Currently, these studies involve the effects of various factors on the development and expression of the physiological and behavioral states of migration. These include alterations in appetite that lead to increased feeding and fattening, expression of specific behaviors characteristic in captive migrants and termination of the stage altogether. Other studies include vocal communication of nocturnal migrants, behavior associated with celestial navigation during migration, role of circadian rhythms and environmental cues in the regulation of day and nighttime behaviors of migrants. In addition endocrine and neuroendocrine aspects of these processes are ongoing. |
| Selected Publications: Wingfield, J.C., and Ramenofsky, M. (1997) Corticosterone and facultative dispersal in unpredictable events. Ardea. 85:155-166. Romero, L.M., Ramenofsky, M., and Wingfield, J.C. (1997) Season and migration alters the corticosterone response to capture and handling in an arctic migrant, the White-crowned Sparrow ( Zonotrichia leucophrys gambelii). Comp. Biochem and Physiol. 116C:171-177. Piersma, T. and Ramenofsky, M. (1998) Long-term decreases of corticosterone in captive migrant shorebirds that maintain seasonal mass and moult cycles. J Avian Biology 29:97-104. Wingfield, J.C., Maney, D.L., Bruener, C.W., Jacobs, J.D., Lynn, S., Ramenofsky, M., and Richardson, R.D. (1998) Ecological bases of hormone-behavior interactions; the “emergency life history stage”. Amer. Zool. 38:191-206. Wingfield, J.C., and Ramenofsky, M. (1999) Hormones and behavioral ecology of stress. In “Stress Phyisology” (P. Balm, ed.), Sheffield University Press, Sheffield, U.K.pp 1-51. Wingfield, J.C., Jacobs, J.D., Soma, K., Maney, D.L., Hunt, K., Wisti-Peterson., D., Meddle, S., Ramenofsky, M., and Sullivan, K. (1999) Testosterone, aggression, and communication: ecological bases of endocrine phenomena. In “The biology of communication” (M. Konishi and M. Hauser, eds.) M.I.T. Press, Cambridge. Ramenofsky, M., Savard, R., and Greenwood, M.R.C. (1999) Seasonal and diel transitions in physiology and behavior in the migratory dark-eyed junco. Comp Biochem Physiol A 122:385-397. Meddle SL, Foidart A, Wingfield JC, Ramenofsky,and M, Balthazart (1999) Effects of sexual interactions with a male on fos-like immunoreactivity in the female quail brain. J Neuroendocrinol 11(10):771-84 Piersma, T., Reneerkens, J., and Ramenofsky, M. (2000) Basal corticosterone peaks in shorebirds with maximal energy stores for migration: a general preparatory mechanism for rapid behavioral and metabolic transitions? Gen Comp Endocrinol. Gen Comp Endocrinol 120:118-126 Hiebert, S.M., Ramenofsky, M., Salvante, K, Wingfield, J.C., and Gass, C.L. (2000) Noninvasive methods for measuring and manipulating corticosterone in hummingbirds, Gen Comp Endocrinol, 120:235-247 Hiebert, S.M.,Salvante, K., Ramenofsky, M., and Wingfield, J.C. (2000) Corticosterone and nocturnal torpor in the rufous hummingbirds (Selasphorus rufus), Gen Comp Endocrinol, 120:220-234. Reneerkens, J., Morrison, R.I., Ramenofsky, M., Piersma, T., Wingfield, J.C. (2002) Baseline and stress-induced levels of corticosterone after a long migratory flight, preparation for breeding and during incubation of a high arctic breeding shorebird (Red Knot, Calidris canutus). Physiol. Biochem. Zool. 75(2):200-208. Landys, M.M., Ramenofsky, M., Piersma, T., Jukema, J., Castricum Ringing Group, Wingfield, J.C. (2002) Baseline and stress-induced plasma corticosterone during long-distance migration in the bar-tailed godwit, Limos lapponica. Physiol. Biochem. Zool. 75(1):101-110, Reneerkens, J., Ramenofsky, M., Piersma, T. (2002) An experimental test of the relationship between temporal variablity of feeding opportunities and baseline levels of corticosterone in a shorebird. J. Exp. Zool. 293:81-88. Ramenofsky, M., R. Agatsuma, M. Barga, R. Cameron, J. Harm, M. Landys, T. Ramfar (2003) Migratory behavior: new insights from captive studies. In Berhold P, Gwinner, E, Sonnenschein, E (eds), Avian Migration, Springer, Berlin, pp 97-112 Landys, M.M., T. Piersma, M. Ramenofsky, and J.C. Wingfield. (2004) The low-affinity glucocorticoid receptor regulates behavior and energy metabolism in the migratory red knot Calidris canutus islandica. Physiological and Biochemical Zoology. 77(4):658-668 Landys, M.M., M. Ramenofsky, and J.C. Wingfield. (2004) The low-affinity glucocorticoid receptor regulates feeding and lipid breakdown in the migratory white-crowned sparrow Zonotrichia leucophrys gambelii. Journal of Experimental Biology, 207:143-154. Landys, M.M., J.C. Wingfield, and M. Ramenofsky (2004) Plasma corticosterone increases during migratory restlessness in the captive white-crowned sparrow Zonotrichia leucophrys gambelii, Hormones and Behavior 46:574-581 Landys, M.M., Piersma, T., Guglielmo, C.G., Jukema, J., M. Ramenofsky, and J.C. Wingfield, (2005) Metabolic profile of long-distance migratory flight and stopover in a shorebird. Proc. Royal Society, 272:295-302 Ramenofsky, M. and Wingfield, J.C. (2006). Physiological conflicts in migrants: the transition between migration and breeding, J of Ornithology, 147:135-145. Landys, M.M. Ramenofsky, M., Wingfield, J.C. (2006) Actions of glucocorticoids at a seasonal baseline as comparaed to stress-related levels in the regulation of periodic life processes. Gen Comp Endocrinol 148:132-149 Agatsuma, R. Ramenofsky M. (2006) The migratory behaviour of captive White-crowned sparrows, Zonotrichia leucophrys gambelii differs during autumn and fall migration. Behaviour, 143(10):1219-1240. Ramenofsky, M. and Wingfield, J.C. (2007) Regulation of Migration. Bioscience, 57(2):135-143. Bonier, F, Martin, PR, Jensen, JP, Butler, LK, Ramenofsky, M, and Wingfield, JC.(2007) Pre-migratory life history stages of juvenile arctic birds: cost, constraints and tradeoffs. Ecology 88:2729-2735. Thorup, Kasper, Bisson, Isabelle-A., Bowlin, Melissa S., Holland, Richard A., Wingfield, John C., Ramenofsky, Marilyn, and Wikelski, Martin. (2007) Evidence for a navigation map stretching across continental U.S. in a migratory songbird. PNAS 104:18115-18119. Lynn, Sharon, E., Egar, Joseph M., Walker, Brian G., Sperry, Todd S., and Ramenofsky, Marilyn. Fish on Prozac®: A simple, non-invasive physiology lab investigating the mechanisms of aggressive behavior in Betta splendens. Advances in physiology education (in press) Coverdill, A.J., Bentley, G.E., and Ramenofsky, M. Circadian and masking control of migratory restlessness in Gambel's white-crowned sparrow (Zonotrichia leucophrys gambelii) Journal Biological Rhythms (in press). |