Nanostructural measurements from transmission electron microscopy images of iridescent barbule components from rump feathers of adult male satin bowerbirds
| Variable . | Mean ± s.e.m. (N=10) . |
|---|---|
| Cortex thickness (nm) | 163.4±1.8 |
| Thickness of outer melanin layer (nm) | 1231.9±50.4 |
| Number of melanin granules in outer layer | 3.2±0.1 |
| Percentage of melanin in outer layer (%) | 82.5±2.6 |
| Percentage of melanin in inner layer (%) | 27.8±1.2 |
| Barbule thickness (μm) | 5.6±0.1 |
| Variable . | Mean ± s.e.m. (N=10) . |
|---|---|
| Cortex thickness (nm) | 163.4±1.8 |
| Thickness of outer melanin layer (nm) | 1231.9±50.4 |
| Number of melanin granules in outer layer | 3.2±0.1 |
| Percentage of melanin in outer layer (%) | 82.5±2.6 |
| Percentage of melanin in inner layer (%) | 27.8±1.2 |
| Barbule thickness (μm) | 5.6±0.1 |
Measurements are based on six measurements per barbule and five barbules per individual.