M. J. Littlejohn
University of Melbourne
35 Papers
620 Citations
M. J. Littlejohn is an academic researcher from University of Melbourne. The author has contributed to research in topics: Allopatric speciation & Hyla. The author has an hindex of 20, co-authored 35 publications. Previous affiliations of M. J. Littlejohn include Museum Victoria & University of Texas at Austin.
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Papers
Premating isolation in the hyla ewingi complex (anura: hylidae)
TL;DR: The present problem centers on the development of one type of premating isolating mechanism -ethological isolation -and whether it arises incidentally along with other adaptive processes operating in allopatric populations, or whether through the direct action of selection for the isolating effect itself.
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Acoustic interaction between two species of leptodactylid frogs
M. J. Littlejohn,AA Martin +1 more
TL;DR: It was demonstrated that Pseudophryne semimarmorata males are inhibited from calling if exposed to Crinia victoriana mating calls of intensities above 80 dB S.L.
105
An experimental evaluation of premating isolation in the hyla ewingi complex (anura : hylidae).
TL;DR: Littlejohn (1965) investigated geographic variation in male mating call structure in two closely related southeastern Australian tree frogs: Hyla ewingi and H. verreauxi, finding that whereas the calls of allopatric populations of the two species were remarkably similar, those of sympathetic populations were quite distinctive, differing especially in pulse repetition rate.
104
Rana pipiens Complex: Mating Call Structure and Taxonomy
M. J. Littlejohn,R. S. Oldham +1 more
TL;DR: Geographic variability in call structure indicates that four largely allopatric populations of leopard frogs are present in the central United States, and it is suggested that the four forms represent distinct species and that the idea of gradual clinal variability in one wide-ranging species is wrong.
86
Analysis of a narrow hybrid zone between two species of pseudophryne (anura: leptodactylidae) in south-eastern australia.
TL;DR: The present study is of parapatric hybridization between P. bibroni Gunther and P. semimarmorata Lucas in south-eastern Australia, and narrow zones of hybridization occur at most places where their ranges contact.
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