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Incidence of vocalizations as a function of frequency (kHz), sex, and lineage
| Males | Females | |
|---|---|---|
| 18–32 kHz | ||
| Low extinguishers | 23 % (N = 11/48) | 8 % (N = 4/50) |
| Randomly bred | 30 % (N = 6/20) | 11 % (N = 2/19) |
| High extinguishers | 5 % (N = 2/39) | 4 % (N = 2/55) |
| 32–96 kHz | ||
| Low extinguishers | 23 % (N = 11/48) | 32 % (N = 16/50) |
| Randomly bred | 50 % (N = 10/20) | 42 % (N = 8/19) |
| High extinguishers | 38 % (N = 11/39) | 22 % (N = 12/55) |
