Is sexual dimorphism in singing behavior related to syringeal muscle composition?

Christensen, Linsey A.; Allred, Lisa M.; Goller, Franz; Meyers, Ron A.

doi:10.1642/auk-17-3.1

Cited by 15 publications

(21 citation statements)

References 47 publications

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“…The average number of MFs per hemisyrinx was higher on the right side compared to the left (left: 3,234 ± 232, n = 4; right: 3,794 ± 334, n = 4; p = 0.04) (Figure 1E). The total number of MFs was 6,995 ± 789 (n = 4), corroborating an earlier reported~6,730, 16 whereas our axon counts are lower but within range of the 1,026 ± 126 (n = 6) reported earlier. 17 To estimate the number of MUs, we assumed the fraction of sensory axons to be between 0% and 33% (see STAR Methods).…”

Section: Resultssupporting

confidence: 92%

One-to-one innervation of vocal muscles allows precise control of birdsong

et al. 2021

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One-to-one innervation of vocal muscles allows precise control of birdsong Highlights d Motor neurons in the zebra finch vocal motor pool innervate single muscle fibers d Zebra finch vocal muscles have the lowest measured isometric stress d Small motor unit size and low muscle stress provide subhertz pitch control resolution d High-resolution control is key to vocal space expansion and songbird radiation

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Section: Resultssupporting

confidence: 92%

One-to-one innervation of vocal muscles allows precise control of birdsong

et al. 2021

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“…Content of superfast fibers in the syrinx does not appear to be correlated with singing ability, because non-singing females do not consistently show lower superfast fiber content. Instead, the percentage of superfast fibers in syringeal muscles may be connected to the involvement of neuromuscular control in the generation of the acoustic structure and the entire vocal repertoire of a species [5].…”

Section: Resultsmentioning

confidence: 99%

Potential Natural Aromatase Blockers on Enhance the Frequency and Sound Quality of Male Canaries

et al. 2020

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The quality sound of singing birds strongly depends on testosterone. Unfortunately, most of the testosterone will be converted to estradiol by the aromatase enzyme. The study aimed to examine the potential of natural aromatase blockers for increasing the frequency and quality of canary chirps. Five adult male canaries, with bodyweight 25-30 g were used in the study. After being adapted for a week, birds were fed a mixture of aromatase blockers and canary seed for 20 days at a dose of 0.3 mg /30 g body weight. Quantities of a song using Hagemon touch methods were calculated by frequency of chirping for 10 minutes, whereas the quality of the song was counted by the periods of once chirping for 10 minutes. Recording begins when the bird is given standard feeding and repeated after treatment for 20 days. The results showed that the frequency of chirping before given a mixture of ingredients was 15.3 /10 min, after being treated with aromatase blockers the frequency increased up to 78.9 /10 min. The length of the tweet before treatment was <1s while after treatment up to 17s. It can be concluded that aromatase blockers can increase the frequency and quality of male Canary's song.

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“…song rate, structure, and context). Existing research indicates an underlying similarity in male and female song production mechanisms, but much work remains to be done to elucidate detailed sex-specific variation (Fortune et al 2011, Christensen et al 2017. Such studies will require documentation of female song so that researchers can appropriately choose study species and analyze results with respect to multiple song features.…”

Section: Applications Of Female Bird Song To a Variety Of Fieldsmentioning

confidence: 99%