Home Back Recent Publications Older Publications

 

 

Hyperlinks to PDF versions of selected articles are below.  You must have Adobe Acrobat to open these files.

 

 

PUBLICATIONS (1990-present)

  

Gerhardt, H.C., Allan, S. and J.J. Schwartz .1990. Female green treefrogs (Hyla

      cinerea) do not selectively respond to signals with a harmonic structure in noise.

    Journal of Comparative Physiology A 166: 791-794.

 

Hausfater, G., Gerhardt, H.C. and G. M. Klump. 1990. Parasites and mate choice

     in gray treefrogs, Hyla versicolor. American Zoologist 30: 299-311.

 

Jřrgensen, M. B. and H.C. Gerhardt. 1991. Directional hearing in the gray treefrog

     Hyla versicolor: eardrum vibrations and phonotaxis. Journal of Comparative

     Physiology A 169: 177-183.

 

Gerhardt, H.C. 1991. Female mate choice in treefrogs: static and dynamic acoustic

     criteria. Animal Behaviour 42: 615-635.

 

McGregor, P.K., Catchpole, C.K., Dabelsteen, T., Falls, J.B., Fusani, L., Gerhardt,

    H.C., Gilbert, F., Horn, A.G., Klump, G.M., Kroodsma, D.E., Lambrechts, M.M.,

    McComb, K.E., Nelson, D.A., Pepperberg, I.M., Ratcliffe, L., Searcy, W.A. and

    Weary, D.M. 1992. Design of playback experiments: the Thornbridge Hall

    consensus. In: Playback and Studies of Animal Communication: Problems and Prospects. NATO

    Advanced Research Workshop (P.  MacGregor  ed.), pp. 1-9, N.Y.: Plenum Press.

 

Gerhardt, H.C. 1992. Conducting playback experiments and interpreting their

     results. In: Playback and Studies of Animal Communication: Problems and Prospects. NATO

    Advanced Research Workshop (P.  MacGregor  ed.), pp. 59-77, N.Y.: Plenum Press.

 

Klump, G.M. and H.C. Gerhardt. 1992. Mechanisms and function of call-timing in

    male-male  interactions in frogs. In: Playback and Studies of Animal Communication:Problems

    and Prospects. NATO Advanced Research Workshop  (P. MacGregor, ed.), pp 153-174. N.Y.:  

    Plenum Press

 

Diekamp, B.M. and H.C. Gerhardt. 1992. Midbrain auditory sensitivity in the spring

     peeper (Pseudacris crucifer): correlations with behavioral studies. Journal of

    Comparative Physiology A 171: 245-250.

 

Gerhardt, H.C. 1992. Multiple messages in acoustic signals. Seminars in the

    Neurosciences 4: 391-400.

 

Gerhardt, H.C. 1993. Multiple causation of the evolution of acoustic signals used in     

   courtship. Etología 1993 (3): 175-193. Appeared in 1994.

 

Gerhardt, H.C., Ptacek, M. B., Barnett, L., and K.G. Torke. 1994. Hybridization

   between the diploid-tetraploid treefrogs Hyla chrysoscelis and Hyla

   versicolor. Copeia 1994: 51-59.

 

Gerhardt, H.C. 1994. Reproductive character displacement of female mate choice in the grey

   treefrog Hyla chrysoscelis. Animal Behaviour 47: 959-969.

 

Gerhardt, H.C., Dyson, M. L., Tanner, S. D. and C. G. Murphy. 1994. Female treefrogs do not

   avoid heterospecific calls during phonotactic approaches to conspecific calls: implications for  

   mechanisms of mate choice.  Animal Behaviour 47: 1323-1332.

 

Breden, F., Gerhardt, H. C., and R. K. Butlin. 1994. Female choice and genetic

   correlations. Trends in Ecology and Evolution 9: 343.

 

Gerhardt, H.C. 1994. Evolution of vocalization in frogs and toads. Annual Reviews

   of Ecology and Systematics 25: 293-324.

 

Ptacek, M.B., Gerhardt, H.C. and R.D. Sage. 1994. Speciation by polyploidy and

     multiple origins of the tetraploid gray treefrog Hyla versicolor. Evolution 48:

     898-908.

 

Gerhardt, H.C. 1994. Selective responsiveness to long-range acoustic signals in

   insects and anurans. American Zoologist 34: 706-714. 

 

Gerhardt, H.C. 1995. Phonotaxis in female frogs and toads: execution and design         

   of experiments. In: Animal Psychophysics: Design and Conduct of Sensory Experiments (G. M.

   Klump, R.R. Dooling, R.R. Fay & W.C. Stebbins, eds.)., pp. 209-220. Basel: Birkhäuser Verlag.

 

Gerhardt, H.C. and J.J. Schwartz. 1995. Interspecific interactions in anuran

     courtship. In: Amphibian Biology: Social Behaviour (H. Heatwole & B.K. Sullivan,

      Eds.), pp. 603-632. Chipping-Norton (Sydney): Surrey Beatty & Sons.

 

Diekamp, B.M. and Gerhardt, H.C. 1995. Behavioral and neurophysiological studies   

    of acoustic communication in the gray treefrog Hyla versicolor. Journal of

   Comparative Physiology A 177: 173-190.

  

Gerhardt, H.C. and G.F. Watson. 1995. Within-male variability in call properties and

      female choice in the grey treefrog. Animal Behaviour 50: 1187-1191.

 

Schwartz, J.J. and H.C. Gerhardt. 1995. Directionality of the auditory system and

    call pattern discrimination during acoustic interference in the gray treefrog Hyla

    versicolor. Auditory Neuroscience 1: 195-206.

 

Gerhardt, H.C., Dyson, M.L., and S.D. Tanner. 1996. Dynamic properties of the

   advertisement calls of gray treefrogs: patterns of variability and female choice.

   Behavioral Ecology 7: 7-18.

 

Murphy, C.G. and H.C. Gerhardt. 1996. Evaluating experimental designs for

    determining mate choice: the effect of amplexus on mate choice by barking   

    treefrogs. Animal Behaviour 51: 881-890.

 

Watson, G.F. and H. C. Gerhardt. 1997. The breeding biology and advertisement   

   call of Litoria splendida Tyler, Davies and Martin. Transactions of the Royal Society of South

  Australia.  121: 119-124.

 

Gerhardt, H.C. 1998. Acoustic signals of animals: field measurements, recording, analysis

   and description. In: Techniques in the Study of Animal Communication by Sound (Hopp, S. &  

   M. Owren, eds.), pp. 1-25. Berlin, Heideberg: Springer Verlag.

 

Schwartz, J.J. and  H.C. Gerhardt. 1998. The neuroethology of call preferences in the

   spring peeper. Animal Behaviour 56: 55-69.

 

Welch, A., Semlitsch, R.L., and H. C. Gerhardt. 1998. Call duration as an indicator of

   genetic quality in male gray treefrogs. Science 280: 1928-1930.

 

Welch, A. M., R. D. Semlitsch and H. C. Gerhardt. 1998.  The handy-dandy kitchen

   device–Response. Science 282: 1994.

 

Walkowiak, W., Berlinger, M., Schul, J. and H. C. Gerhardt. 1999. Significance of forebrain

structures in acoustically guided behavior in anurans. European Journal of Morphology 37: 116-120.

 

Krenz, J., Semlitsch, R.D., Gerhardt, H.C. and P.A. Mahoney. 1999. Isolation and characterization

   of simple sequence repeat loci in the gray treefrog, Hyla chrysoscelis. Genome 42: 1-6.

 

Gerhardt, H.C. and J. Schul. 1999. A quantitative analysis of behavioral selectivity for pulse-rise

      time in the gray treefrog, Hyla versicolor. Journal of Comparative Physiology A 185: 33-40.

 

Gerhardt, H.C. 1999. Reproductive character displacement and other sources of         

   environmental selection on acoustic communication systems. In: The Design of Animal

  Communication (Hauser, M. and M. Konishi, eds.), pp. 515-534. Cambridge:  MIT Press.

 

Murphy, C.G. and H.C. Gerhardt. 2000. Preference functions of individual female barking

   treefrogs, Hyla gratiosa. Evolution 54: 660-669.

 

Gerhardt, H.C., Roberts, J.D., Bee, M.A. and J.J. Schwartz. 2000. Call matching in the quacking

   frog (Crinia georgiana). Behavioral Ecology and Sociobiology 48: 243-251.

 

Gerhardt, H.C., Tanner, S.D., Corrigan, C.M. and H.C. Walton. 2000. Female preference functions

    based on call duration in the gray treefrog (Hyla versicolor). Behavioral Ecology 11: 663-669.

 

Bee, Mark A., Kozich, C.E., Blackwell, K.J. and H. C. Gerhardt. 2001. Individual variation

  in advertisement calls of territorial male green frogs, Rana clamitans: implications for

  individual discrimination. Ethology 107: 1-21.

 

Keller, M. D. and H. C. Gerhardt. 2001. Polyploidy affects call structure in gray treefrogs.

   Proceedings of the Royal Society (London), Series B 268: 341-345.

 

Gerhardt, H.C. 2001. Acoustic communication in two groups of closely related treefrogs. Advances

   in Behavioral Biology (Slater, P.J.B., Rosenblatt, J.S., Snowdon, C.T. and T. J. Roper, eds.),

   pp. 99-167. New York: Academic Press.

 

Bee, M. A. and H.C. Gerhardt. 2001. Habituation as a mechanism of reduced aggression between

   neighboring territorial male bullfrogs, Rana catesbeiana. Journal of Comparative Psychology,

   115: 68-82.

 

Gerhardt, H.C. and J.J. Schwartz. 2001. Auditory tuning and frequency preferences in anurans. In:

 Anuran Communication (Ryan, M.J., ed), pp. 73-85. Washington: Smithsonian Institution Press.

 

Gerhardt, H.C. 2001. Acoustic communication in frogs and toads. In: Model Systems in Behavioral

   Ecology (Dugatkin, L., ed.), pp. 169-190. Princeton: Princeton University Press.

 

Schwartz, J.J., Buchanan, B. and H.C. Gerhardt. 2001. Female mate choice in the gray

   treefrog (Hyla versicolor) in three experimental environments. Behavioral Ecology and

  Sociobiology 49: 443-455.

 

Bee, M.A. and H. C. Gerhardt. 2001. Individual discrimination by territorial male bullfrogs

   (Rana catesbeiana): I. Individual variation in advertisement calls. Animal  Behaviour 62:

   1129-1140.

 

Bee, M.A. and H. C. Gerhardt. 2001. Individual discrimination by territorial male bullfrogs

   (Rana catesbeiana): II. Perceptual mechanisms. Animal Behaviour 62: 1141-1150.

 

Bush, S.L., Gerhardt, H.C. and J. Schul. 2002. Pattern recognition and call preferences in

    treefrogs (Anura: Hylidae): a quantitative analysis using a no-choice paradigm.

    Animal Behaviour 63: 7-14.

 

Bee, M.A. and H.C. Gerhardt. 2002. Individual voice recognition in a territorial frog (Rana

  catesbeiana). Proceedings of the Royal Society of London Series B 269: 1443-1448.

 

Murphy, C.G. and H.C. Gerhardt. 2002. Mate-sampling by female barking treefrogs (Hyla

    gratiosa). Behavioral Ecology 13: 472-480.

 

Gerhardt, H.C. and Franz Huber. 2002. Acoustic Communication in Insects and Frogs:

   Common Problems and Diverse Solutions. Chicago: University of Chicago Press.

 

Gerhardt, H.C. 2002. Sexual dimorphism. In: Encyclopedia of Evolution (Pagel, Mark, ed.).

    Oxford: Oxford University Press

 

Gerhardt, H.C. 2002. Neuroethology of sound communication in anurans (frogs and toads). In:

   Encyclopedia of Neuroscience (G. Adelman and B. H. Smith, eds.). Oxford: Oxford

   University Press, published on-line

 

Schwartz, J.J., Buchanan, B.W. and H.C. Gerhardt. 2002. Acoustic interactions among male

   gray treefrogs, Hyla versicolor, in a chorus setting. Behavioral Ecology & Sociobiology

   53: 9-19

 

Höbel, G. and H.C. Gerhardt. 2003. Reproductive character displacement in the acoustic

   communication system of green treefrogs (Hyla cinerea). Evolution 57: 894-904.

 

Endepols, H., Feng, A.S., Gerhardt, H.C., Schul, J. and W. Walkowiak. 2003. Roles of the auditory  

    midbrain and thalamus in selective phonotaxis in female gray treefrogs (Hyla versicolor). 

    Behavioral Brain Research 145: 53-77.

 

Gerhardt, H. C. 2003. Animal communication. Journal of the Acoustical Society of America

    114: 578.  Book Review.

 

Endepols, H., Schul, J., Gerhardt, H.C. and W. Walkowiak. 2004. 6-Hydroxydopamine lesions in  

     anuran amphibians: A new model system for Parkinson’s disease? Behavioral Neurobiology 

     60: 395-410.

 

Gerhardt, H.C. 2004. Chorusing in frogs. In: Encyclopedia of Animal Behavior (Marc Bekoff,

     ed), pp. 383-385. Greenwood Press, Westport CT

 

Klump, G.M., Benedix, Jr. J.H., Gerhardt, H.C. and  P. M. Narins. 2004.  AM-representation in

     green treefrog auditory-nerve fibers: neuroethological implications for pattern recognition
     and sound localization. Journal of Comparative Physiology A 190:1011–1021.

 

Gerhardt H. C. 2005. Acoustic spectral preferences in two cryptic species of

  gray treefrogs: implications for mate choice and sensory mechanisms. Animal Behaviour 70: 39-49.

 

Gerhardt H. C. 2005. Advertisement-call preferences in diploid-tetraploid treefrogs (Hyla

  chrysoscelis and Hyla versicolor): implications for mate choice and the evolution of

  communication systems. Evolution, 59:395-408.

 

Gerhardt, H. C. and G. Höbel. 2005. Mid-frequency suppression in the green treefrog (Hyla

   cinerea): implications for mechanisms and the evolution of acoustic communication. Journal

   of Comparative Physiology A, 191:707-714.


Jang, Y. and H. C. Gerhardt. 2006. Divergence in the calling songs between sympatric and
   allopatric populations of the southern wood cricket Gryllus fultoni (Orthoptera: Gryllidae).

  Journal of Evolutionary Biology 19: 459-472. 


Holloway, A. K., Cannatella, D.C., Gerhardt, H.C. and D.M. Hillis. 2006. Polyploids with
   different origins and ancestors form a single sexual polyploidy species. American Naturalist
   167: E88-E101
.

Marshall, V.T., Schwartz, J.J. and H. C. Gerhardt. 2006. The effects of cross-species
   advertisement call overlap on signal discrimination and phonotactic behaviour of grey treefrogs
   Animal Behaviour 72: 449-459.

Robillard, T., Höbel, G. and H. C. Gerhardt. 2006. Evolution of advertisement signals in North
   American hylid frogs: vocalizations as end-products of calling behavior. Cladistics 22: 1-13.

Gerhardt, H.C. and Mark A. Bee. 2006. Recognition and localization of acoustic signals. In:
   Hearing and Sound Communication in Amphibians
(Ed: Feng, Narins, Popper & Fay, pp. 113-
   146.  New York: Springer Verlag.

Jang, Y. and H. C. Gerhardt. 2006. Divergence in female calling song discrimination between
  sympatric and allopatric populations of the southern wood cricket Gryllus fultoni (Orthoptera:
  Gryllidae). Behavioral Ecology and Sociobiology 60:150-158..

Jang, Y. and H. C. Gerhardt. 2007. Differential temperature effects on calling songs between
   allopatric and sympatric populations of Gryllus fultoni (Orthoptera: Gryllidae). J. Insect
   Behavior
20: 33-52.

Gerhardt, H.C., Humfeld, S.C. and V.T. Marshall. 2007. Temporal order and the evolution of
  complex acoustic signals. Proceedings of the Royal Society London B 274: 1789-1794.

Gerhardt, H.C., Martinez-Rivera, C.C., Schwartz, J.J., Marshall, V.T. and C.G. Murphy. 2007
   Preferences based on spectral differences in acoustic signals in four species of treefrogs.
  Journal of Experimental Biology 210: 2990-2998.

Jang, Y., Bockhorst, A. and H. C. Gerhardt. 2007. Reproductive isolation in the wood cricket
   Gryllus vernalis (Orthoptera: Gryllidae). Ethology, 113: 87-96.

Gerhardt, H. C., Humfeld, S. C, and V. T. Marshall. 2007. Temporal order and the evolution of
  complex acoustic signals. Proceedings of the Royal Society of London, Part B 274: 1789-1794.

Gerhardt, H. C., Martinez-Rivera, C.C., Schwartz, J.J., Marshall, V.T. and C.G. Murphy. 2007.
  Preferences based on spectral differences in acoustic signals in four species of treefrogs. Journal
   of Experimental Biology
210: 2990-2998.

Höbel, G. and H. C. Gerhardt. 2007. Sources of selection on signal timing in a tree frog.
  Ethology 113: 773-782.

Jang, Y., Gerhardt, H.C. and J. Choe. 2008. A comparative study of aggressiveness in eastern
  North American field cricket species (Genus Gryllus). Behavioral Ecology and Sociobiology,
   62: 1397-1407.

Gerhardt, H. C. 2008. Phonotactic selectivity in two cryptic species of gray treefrogs: effects of
  differences in pulse-rate, carrier frequency, and playback level. Journal of Experimental Biology,
   in press.

Martínez-Rivera, C.C. & H. C. Gerhardt. 2008. Advertisement-call modification and female
  preference in the bird-voiced treefrog, Hyla avivoca. Behavioral Ecology and Sociobiology
   63: 195-208.

Gordon, N.M. & H.C. Gerhardt. 2009. Hormonal modulation of phonotaxis and advertisement-
  call preferences in the gray treefrog (Hyla versicolor). Hormones & Behavior, in press.

Gerhardt, H. C. & R. Brooks. 2009. Experimental evidence of multivariate female choice
   in gray treefrogs (Hyla versicolor): evidence for directional and stabilizing selection.
   Evolution 63: 2504-2512.

Marshall, V.T. & H. C. Gerhardt. 2010. A precedence effect underlies preferences for leading
  pulses in the grey treefrog (Hyla versicolor). Animal Behaviour 80: 139-145.

Klymus, K.E., Humfeld, S.C., Marshall, V.T., Cannatella, D. & H.C. Gerhardt. 2010.
  Molecular patterns of differentiation in canyon treefrogs (Hyla arenicolor): evidence for
  introgressive hybridization with the Arizona treefrog (H. wrightorum) and correlations with
  advertisement call differences. Journal of Evolutionary Biology 23: 1425-1435.

Reichert, M. S. and H. C. Gerhardt. 2011. The role of body size on the outcome,
   escalation and duration of contests in the grey treefrog Hyla versicolor. Animal
  Behaviour
82:951-959.

Tucker, M. A. and H. C. Gerhardt. 2011. Parallel changes in mate-attracting calls and
   Female preferences in autotriploids tree frogs. Proceedings of the Royal Society London B
  279: 1583-1587.

Klymus, K. E., Humfeld, S.C. and H. C. Gerhardt. 2012. Geographic variation in male
   advertisement calls and female preference of the wide-ranging canyon treefrog Hyla
  arenicolor. Biological Journal of the Linnean Society
107: 219-232.

Reichert, M.S. and H.C. Gerhardt. 2012. Trade-offs and upper limits to signal performance
  during close-range vocal competition in gray treefrogs, Hyla versicolor. The American
  Naturalist
180: 425-437.

Reichert , M.S. and H.C. Gerhardt. In press Socially-mediated plasticity in call timing in
   the gray treefrog, Hyla versicolor. Behavioral Ecology (published on-line November 2012)

Reichert, M.S. and H. C. Gerhardt. 2013. Gray tree frogs, Hyla versicolor, give lower-
   frequency aggressive calls in more escalated contests. Behavioral Ecology and
   Sociobiology
199: 795-804.

Gerhardt, H.C. and S.C. Humfeld. 2013. Pre-existing sensory biases in the spectral
   domain in frogs: empirical results and methodological considerations. Journal of
   Comparative Physiology A
199: 151-157.

Reichert, M.S. and H.C. Gerhardt. 2013. Socially mediated call timing in the gray
   treefrog, Hyla versicolor. Behavioral Ecology 24: 393-401.

Henderson, J.J. and H. C. Gerhardt 2013. Restoration of call attractiveness by novel
   Acoustic appendages in gray treefrogs. Animal Behavior 86: 537-543.

Gerhardt, H. C. 2013. Geographic variation in acoustic communication: reproductive
   Character displacement and speciation. Evolutionary Ecology Research 15: 605-632.

Welch, A.M., Smith, M. J. and H.C. Gerhardt. A multivariate analysis of genetic
   variation in the advertisement call of the gray treefrog Hyla versicolor, In press,
  Evolution

Home Back Recent Publications Carl's Curriculum Vitae Older Publications