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6 Cards in this Set
- Front
- Back
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Frogs and Toads
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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 |
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Cyclorana
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12 spp
Drier areas (in pic) C. platycepala, Water holding frog |
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Litoria lesueuri
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2 representatives
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Post mating isolation mechanisms
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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 |
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Pre mating isolation mechanisms
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Specific mate recognition systems
Female frog's response to mating calls Made only by an 'appropriate' male STUDY! 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 |
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Species specificity of frog calls
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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. |
