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Neural Mechanisms for the
Coordination of Duet Singing in Wrens (How do…
Neural Mechanisms for the
Coordination of Duet Singing in Wrens (How do wrens coordinate their duet singing at a neural level?)
Background
Male and Female Plain-tailed Wrens work together to produce a duet (Male and female alternate syllable sounds)
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Central Hypothesis: The neural circuits in both male and female wrens encode the joint cooperative duet, not just the birds individual parts
Methods
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Captured 150 hours of acoustic recordings using Chusquea bamboo thickets (wrens maintain territory here)
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Results
Figure 1
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Acoustic Structure and sequence of syllables produced by each individual were identical in duet and when they sang alone
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Panel C
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Show that males and females share similar, but not identical, mechanisms for cooperative production of duets
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Figure 3
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In majority of the neurons the response strengths were elicited by duet stimili than the sum of the response strengths to female and male syllables presented alone
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Response strength and d' measures indicate that a majority of HVC units exhibited facilitated responses to the combined duet than the each individuals part of the duet
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Figure 4
Main Question: How are temporal interactions between females and males for the cooperative production of duets encoded?
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Conclusions
In both females and amles, the female syllables elicited significantly stronger responses than did the male syllables (This is from figure 3)
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Stronger responses to a specific partner in male wrens might be an adaptation for duet singing in these birds
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Wrens' HVC encodes the combined song, not just self-song
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Limitations
Small sample size of only 3 females, 3 males
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Focused only on HVC, when there is a possibility of other brain regions involved