A. In terms of the barriers in place that keep species separate, explain whether song recognition is a prezygotic barrier or a post-zygotic barrier. B. Explain which type of isolating mechanism this wouldbe once you determine the barrier type. C. Discuss why song would be a barrier to mating with another species and having the incorrect song might change your fitness potential.
A. In terms of the barriers in place that keep species separate, explain whether song recognition is a prezygotic barrier or a post-zygotic barrier. B. Explain which type of isolating mechanism this wouldbe once you determine the barrier type. C. Discuss why song would be a barrier to mating with another species and having the incorrect song might change your fitness potential.
Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN:9781337408332
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Chapter43: Animal Behavior
Section: Chapter Questions
Problem 3CT: European cuckoos and North American brown-headed cowbirds are not dose relatives, but both lay their...
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A. In terms of the barriers in place that keep species separate, explain whether song recognition is a prezygotic barrier or a post-zygotic barrier.
B. Explain which type of isolating mechanism this wouldbe once you determine the barrier type.
C. Discuss why song would be a barrier to mating with another species and having the incorrect song might change your fitness potential.

Transcribed Image Text:Song Differences
There are two main reasons why Geospiza birds might not breed with
each other: song and body shape. Bird songs in males are a crucial way
to attract mates. Being able to recognize the shape of a mate is also very
important. Bird songs are learned in a very short window of time in a
sensitive period of a young male's life. G. fortis only sings one song and
although it varies a bit, it is distinct. Females do not sing, but the choose
mates based on the song communication.
As members of the interbreeding population were born and learned
songs, they learned them incorrectly. Figure 2A below shows sonographs
songs of the original immigrant (5110), a son (15830) and a fifth
generation descendant (19668), compared with Figure 2B which show
three Daphne G. fortis individuals that sang a standard form.
A
SI10
G fortis 16858
ISK30
G fortis 13244
2
19968
G fortis S649
Time (s)
Time (s)
(THY) Kouanbaa
Frequency (kHz)
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