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6 Cards in this Set

  • Front
  • Back
Frogs and Toads
Order Anura
In OZ, 5 of the world's 23-25 families
Hylidae (Pelodrtadidae)
3 genera (most Litoria) >80 spp
Leptodactylidae (Myobatrachidae)
23 genera >100 spp
Microhylidae, ca. 14 spp
Ranidae, one genus, one spp, Rana daemeli
Bufonidae, introduced Bufo marinus
12 spp
Drier areas
(in pic) C. platycepala, Water holding frog
Litoria lesueuri
2 representatives
Post mating isolation mechanisms
If Frogs that are different but closely related species mate, the embryo fails to develop.
Waste of energy.
Evolve post mating isolation mechanisms that make it so that only certain sperm can fertilize the egg
Pre mating isolation mechanisms
Specific mate recognition systems
Female frog's response to mating calls
Made only by an 'appropriate' male
Litoria ewingii& L. verreauxi, thought separated for 9-12K yrs before present sympatry occurred.
when they are apart they sound the same. When they live together they sound different.
The females went to the sound that sounded like 'their' male
Discrimination was made on the basis of DIFFERENT PULSE REPETITION RATE
Species specificity of frog calls
How do frogs disentangle the call they want from complex chords?
Female ear is tuned to be most sensitive in a narrow frequency band- frequency spectrum can be shared.