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Dr. Sarah A. Stamper

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Sarah A. Stamper Sarah A. Stamper

Google Scholar Profile
sstamper (at) jhu.edu

Contents

Research Interests:

A hidden world of sensory signals and behavior lies beyond human perceptual capabilities. Flying bats capture insects within vegetation in complete darkness using sounds that are well beyond the range of human hearing. Hundreds of species of fish use electricity as a mechanism for sensing and communicating. Beginning with my undergraduate studies, I have focused my research efforts on understanding these sorts of 'exotic' model systems, including studying active touch in manatees, echolocation in bats, and electroreception in weakly electric fish.

My approach involves the quantitative analysis of animal behavior in experimental paradigms designed to complement physiological recordings that reveal the underlying neural mechanisms. My research addresses two main questions: (1) how an animal’s movement influences incoming sensory information and (2) how animals sense in the presence of conspecifics that are also generating sensory signals that may have overlapping spatiotemporal characteristics. The methods used in my research include fieldwork, well-controlled behavioral laboratory experiments and electrophysiological recordings in awake-behaving animals.

Publications:

Journal Articles

  1. Madhav, M.S., Stamper, S.A., Fortune, E.S., & Cowan, N.J. (Submitted) Closed-loop stabilization of the Jamming Avoidance Response reveals its locally unstable and globally nonlinear dynamics. J Exp Biol.
  2. Stamper, S.A., Fortune, E.S., & Chacron, M.J. (In Press) Perception and coding of envelopes in weakly electric fishes. J Exp Biol.
  3. Stamper, S.A.*, Madhav, M.S.*, Cowan, N.J., & Fortune, E.S. (2012) Beyond the Jamming Avoidance Response: Weakly electric fish respond to the envelope of electrosensory stimuli. J Exp Biol, 215:4196-4207. (*authors contributed equally) Article covered by "Inside JEB" (http://jeb.biologists.org/content/215/23/iii) and (http://jeb.biologists.org/content/215/24/4233.full) for placing in the "Top 8 Most Outstanding Papers 2012". Also covered by "CBC's Quirks & Quarks" (http://www.cbc.ca/quirks/episode/2012/11/24/november-24-2012/).
  4. Stamper, S.A., Roth, E. Cowan, N.J., & Fortune, E.S. (2012) Active sensing via movement shapes spatiotemporal patterns of sensory feedback. J Exp Biol, 215:1567-1574.
  5. Fellner, W., Bauer, G.B., Stamper, S.A., Losch, B. & Dahood, A. (2012) The development of synchronous movement by bottlenose dolphins (Tursiops truncatus). Mar Mammal Sci. DOI: 10.1111/j.1748-7692.2012.00609.x
  6. Bauer, G.B., Gaspard, J.C., Colbert, D.E., Leach, J.B., Stamper, S.A., Mann, D.A., & Reep, R.L. (2012). Tactile discrimination of textures by Florida manatees (Trichechus manatus latirostris) Mar Mammal Sci. 28:E456-E471.
  7. Roth, E., Zhuang, K., Stamper, S.A., Fortune, E.S. and Cowan, N.J. (2011) Stimulus Predictability Mediates a Switch in Locomotor Smooth Pursuit Performance for Eigenmannia virescens. J Exp Biol, 214:1170-1180.
  8. Stamper, S.A., G-Carrera, E., Tan, E.W., Fugere, V., Krahe, R., & Fortune, E.S. (2010) Species differences in group size and electrosensory interference in weakly electric fishes: Implications for electrosensory processing. Brain Beh Res 207:368-376.
  9. Hitschfeld, E., Stamper, S.A., Vonderschen, K., Fortune, E.S., & Chacron, M.J. (2009). Effects of restraint and immobilization on the electrical behaviors of weakly electric fish. ILAR J 50: 361-372.
  10. Stamper, S.A., Bates, M.E., Benedicto, D., & Simmons, J.A. (2009). Role of broadcast harmonics in echo delay perception by big brown bats. J Comp Physiol A 195:79-89.
  11. Hiryu, S., Shimamoto, H., Bates, M., Stamper, S.A., Simmons, J. A., and Riquimaroux, H. (2008) Jamming avoidance strategy for temporal overlap of own reverberant echoes by FM echolocating bats (Eptesicus fuscus) during flight, revealed by telemetry sound recording. The Acoustical Society of Japan, Trans. Tech. Comm. Psychol. Physiol. Acoust., 38, 221-226.
  12. Stamper, S.A., Simmons, J.A., DeLong, C.M., & Bragg, R. (2008). Detection of targets co-localized in clutter by echolocating big brown bats (Eptesicus fuscus). J Acoust Soc Am 124:667-673.
  13. Bates, M.E., Stamper, S.A., & Simmons, J.A. (2008). Jamming avoidance response of big brown bats in target detection. J Exp Biol 211:106-113
  14. Horowitz, S.S., Stamper, S.A., & Simmons, J.A. (2008). Connexin expression in the cochlear nucleus of echolocating big brown bats. Brain Res 1197:76-84.
  15. DeLong, C.M., Au, W. W., & Stamper, S.A. (2007). Echoic cues used by human listeners to discriminate among objects that vary in material or structure: Implications for echolocating dolphins. J Acoust Soc Am 121:605-617.

Recent Conference Presentations (2009-2012)

  1. Stamper, S.A., Madhav. M.S., Cowan, N.J., & Fortune, E.S (2012, Oct). Social envelope responses in Eigenmannia and Apteronotus. 43rd annual meeting of the Society for Neuroscience, New Orleans LA
  2. Tytell, E.D., Stamper, S.A., Cowan, N.J., & Fortune, E.S (2012, Oct). Direction selective sensory neurons respond to very low frequencies. 43rd annual meeting of the Society for Neuroscience, New Orleans LA
  3. Stamper, S.A., Madhav. M.S., Cowan, N.J., & Fortune, E.S (2012, Aug). Beyond the Jamming Avoidance Response: Eigenmannia respond to social envelopes. 10th Congress of the International Society for Neuroethology, College Park, MD.
  4. Stamper, S.A., Roth, E., Cowan, N.J., & Fortune, E.S (2011, Nov). Modality-specific changes in locomotor behavior indicate increased costs for active sensing. 42nd annual meeting of the Society for Neuroscience, Washington DC.
  5. Madhav, M., Stamper, S.A., Roth, E., Cowan, N.J., & Fortune, E.S (2011, Nov). Weakly electric fish change their electric organ discharges in response to electrosensory envelopes. 42nd annual meeting of the Society for Neuroscience, Washington DC.
  6. Fortune, E.S., Stamper, S.A., Tytell, E.D., & Cowan, N.J. (2011, Nov). Role of direction selective responses in locomotor control. 42nd annual meeting of the Society for Neuroscience, Washington DC.
  7. Stamper, S.A., Madhav, M., Cowan, N.J., & Fortune, E.S (2011, May). Shifts in behaviors under varying sensory and social cues for refuge tracking by electric fish. 3rd annual Electrosensory Processing meeting, Montreal, Canada.
  8. Stamper, S.A., Madhav, M., Cowan, N.J., & Fortune, E.S (2011, May). Behavioral response to envelope stimuli that impair electrosensory processing. 3rd annual Electrosensory Processing meeting, Montreal, Canada.
  9. Madhav, M. Stamper, S.A., Fortune, E.S., Cowan, N.J. (2011, Feb). Identifying an unstable sensorimotor behavior: the Jamming Avoidance Response in Eigenmannia. 11th annual Conference on Computation and Systems Neuroscience, Salt Lake City UT.
  10. Roth, E., Zhang, K., Stamper, S.A., Fortune, E.S., Cowan, N.J. (2011, Feb). Stimulus predictability mediates a switch in locomotor smooth pursuit performance for Eigenmannia. 11th annual Conference on Computation and Systems Neuroscience, Salt Lake City UT.
  11. Stamper, S.A., Madhav, M., Cowan, N.J., & Fortune, E.S (2010, Aug). Envelope avoidance response in Eigenmannia virescens. 9th Congress of the International Society for Neuroethology, Salamanca, Spain.
  12. Stamper, S.A., Carver, S., & Fortune, E.S (2009, Oct). Multimodal integration in midbrain neurons of Eigenmannia virescens. 40th annual meeting of the Society of Neuroscience, Chicago IL.
  13. Madhav, M. Stamper, S.A., Roth, E., Fortune, E.S., & Cowan, N.J. (2009, Oct). Balancing the Jamming Avoidance Response: Closed-loop identification of an unstable sensorimotor behavior. 40th annual meeting of the Society of Neuroscience, Chicago IL.
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