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PUBLICATIONS (1965-1989)
Martof, B.S.,
and H.C. Gerhardt. 1965. Observations on geographical variation in
Ambystoma cingulatum. Copeia 1965: 342-346.
Gerhardt, H.C.
1973. Reproductive interactions between Hyla
crucifer and
Pseudacris
ornata (Anura: Hylidae). American Midland Naturalist 89: 81-88.
Gerhardt, H.C.
1974. Mating call differences between eastern and western
populations of the treefrog Hyla chrysoscelis. Copeia 1974: 534-536.
Gerhardt, H.C.
1974. Behavioral isolation of the treefrog Hyla
cinerea and
Hyla
andersonii. American Midland Naturalist 91: 424-433.
Gerhardt, H.C.
1974. Vocalizations of some hybrid treefrogs: acoustic and
behavioral analyses. Behaviour 49: 130-151.
Gerhardt, H.C.
1974. The significance of some spectral features in mating call
recognition in the green treefrog (Hyla cinerea).
Journal of Experimental Biology
61: 229- 241.
Oldham, R.S. and H.C. Gerhardt. 1975.
Behavioral isolation of the treefrogs
Hyla
cinerea and Hyla gratiosa. Copeia 1975: 223-231.
Gerhardt,
H.C.1975. Sound pressure levels and radiation patterns of the
vocalizations of some North American frogs
and toads.
Journal of Comparative
Physiology
102:1-12.
Feng, A.S., H.C.
Gerhardt, and R.R. Capranica. 1976. Sound localization behavior in the green
and barking treefrogs. Journal of Comparative Physiology
107:241-252.
Gerhardt, H.C.
1976. Significance of two frequency bands in long distance vocal
communication in the green treefrog. Nature
(London) 261:692-694.
Gerhardt, H.C.
1978. Temperature coupling in the vocal communication system of
the gray treefrog Hyla versicolor. Science 199:992-994.
Gerhardt, H.C.
1978. Discrimination of intermediate sounds in a synthetic call
continuum by female green treefrogs. Science 199: 1089-1091.
Gerhardt, H.C.
1978. Mating call recognition in the green treefrog (Hyla cinerea):
significance of some fine-temporal properties. Journal of Experimental Biology
74:59-73.
Perrill, S.A.,
H.C. Gerhardt, and R. Daniel. 1978. Sexual parasitism in the green
treefrog (Hyla cinerea). Science
200:1179-1180.
Rheinlaender,
J., H.C. Gerhardt, D. Yager, and R.R. Capranica. 1979. Accuracy
of phonotaxis in the green treefrog (Hyla cinerea).
Journal of Comparative
Physiology
133:247-255
Gerhardt, H.C.
and Mudry, K.M. 1980. Temperature effects on frequency
preferences and mating call frequencies in
the green treefrog, Hyla cinerea
(Anura: Hylidae). Journal of Comparative Physiology 137:1-6.
Gerhardt, H.C.
and Hans Schneider. 1980. Mating call discrimination by females
of the treefrog Hyla meridionalis. Behavioural
Processes 5: 143-149.
Gerhardt, H.C.
and J. Rheinlaender. 1980. Accuracy of sound localization in a
miniature dendrobatid frog. Die Naturwissenschaften 67:362-363.
Gerhardt, H.C.,
S.I. Guttman, and A. Karlin. 1980. Natural hybrids between
Hyla
cinerea and Hyla
gratiosa: morphology, vocalization and electrophoretic analysis.
Copeia 1980: 577-584.
Ehret, G. and
H.C. Gerhardt. 1980. Auditory masking and effects of noise on
responses of the green treefrog (Hyla cinerea) to synthetic mating calls.
Journal
of Comparative
Physiology 141: 13-18.
Gerhardt, H. C.
1981. Mating call recognition in the green treefrog (Hyla cinerea):
importance of two frequency bands as a
function of sound pressure level.
Journal
of Comparative
Physiology
144: 9-16.
Gerhardt, H.C.
1981. Mating call recognition in the barking treefrog (Hyla gratiosa):
responses to synthetic calls and comparisons
with Hyla cinerea.
Journal of
Comparative
Physiology
144:17-25.
Rheinlaender,
J., Walkowiak, W. and H.C. Gerhardt. 1981. Directional hearing in
the green treefrog: a variable mechanism? Die Naturwissenschaften 67:430-431.
Perrill, S.A.,
Gerhardt, H.C. and R.E. Daniel. 1982. Mating strategy in male green
treefrogs (Hyla cinerea): an experimental study. Animal Behaviour 30: 43-48.
Gerhardt, H.C.
1982. Sound pattern recognition in some North American treefrogs
(Anura: Hylidae): implications for mate choice. American Zoologist 22: 581-
595.
Gerhardt, H.C. and J. Rheinlaender. 1982. Localization of an
elevated sound
source by the
green treefrog. Science 217: 663-664.
Gerhardt, H.C. 1983. Communication and the
environment. In: Communication and Social
Interactions
(Halliday, T. and P. Slater, eds), pp. 82-113. Oxford: Blackwell Scientific
Publications, pp. 82-113.
Doherty, J.A. and H.C. Gerhardt. 1983. Hybrid
treefrogs: vocalizations of males
and selective phonotaxis of females. Science 220: 82-113.
Gerhardt, H.C.
1983. Acoustic communication in treefrogs.
Proceedings
of the
German
Zoological Society 1983: 25-35.
Doherty, J.A.
and H.C. Gerhardt. 1984. Evolutionary and neurobiological
implications of selective
phonotaxis in the spring peeper (Hyla
crucifer).
Animal
Behaviour 32: 875-881.
Doherty, J.A.
and H.C. Gerhardt. 1984. Acoustic communication in hybrid
treefrogs: sound production by males and
selective phonotaxis of females.
Journal
of Comparative Physiology 154: 319-330.
Gerhardt, H.C.
1986. Recognition of spectral patterns in the green treefrog:
neurobiology and evolution. Experimental Biology 45: 167-178.
Gerhardt, H.C. 1986. Frog chorus: vocal
communication in frogs and toads.
In The
Encyclopedia of Reptiles and Amphibians (Halliday, T.R. and Adler, K.,
eds), pp. 58-59.
NY: Facts on File Inc.
Klump, G.M. and
Gerhardt, H.C. 1987. Use of non-arbitrary acoustic criteria in
mate choice by female gray tree frogs. Nature (London) 326:286-288.
Gerhardt, H.C.
1987. Evolutionary and neurobiological implications of selective
phonotaxis in the green treefrog, Hyla cinerea. Animal Behaviour 35: 1479-1489.
Gerhardt, H.C.,
Daniel, R.E., Perrill, S.A. and S. Schramm. 1987. Mating behaviour
and male mating success in the green
treefrog. Animal Behaviour 35:
1490-1503.
Gerhardt, H.C.
1988. Acoustic properties used in call recognition by frogs and
toads. In: The Evolution of the
Amphibian Auditory System. (Fritzsch, B., Hethington, T., Ryan,
M., Wilczynski, W. and Walkowiak, W.,
eds), pp. 455-483. N.Y.: John Wiley & Sons.
Gerhardt, H.C.
and J.A. Doherty 1988. Acoustic communication in the gray
treefrog, Hyla versicolor: evolutionary and neurobiological implications.
Journal
of Comparative
Physiology A
162: 261-278.
Gerhardt, H.C.
and M.S. Davis 1988. Variation in the coding of species identity in
the
advertisement calls of Litoria verreauxi
(Anura: Hylidae). Evolution 42: 556-565.
Gerhardt, H.C.
and G.M. Klump 1988. Masking of acoustic signals by the chorus
background noise in the green tree frog:
a limitation on mate choice. Animal
Behaviour 36: 1247-1249.
Gerhardt, H.C.
and G.M. Klump 1988. Phonotactic responses and selectivity of
barking treefrogs (Hyla gratiosa) to chorus sounds.
Journal of Comparative
Physiology 163: 795-802.
Klump, G.M. and
H.C. Gerhardt 1989. Sound localization in the barking treefrog
(Hyla
gratiosa). Die Naturwissenschaften
76: 35-37.
Gerhardt, H.C.
1989. Acoustic pattern recognition in anuran amphibians. In: The Comparative
Psychology
of Complex Acoustic Perception. (S. Hulse & R. Dooling (eds), pp. 175-
197. Baltimore: Erlbaum Publ. Co.
Gerhardt, H.C.,
Diekamp, B.M. and M. Ptacek. 1989. Inter-male spacing in
choruses of the spring peeper, Pseudacris
crucifer. Animal Behaviour 38:
1012-1024.
Schwartz, J.J.
and H.C. Gerhardt 1989.
Spatially-mediated release from masking
in an anuran amphibian. Journal of Comparative Physiology A 166: 37-41.