Scree patch analysis indicated that the first two-principle section were appropriate for study (eigenvalues = dos.04 and you can 1.57). Together, it define ninety% of the type (PC1 = 51% and you will PC2 = 39%) in the constitution parameters. Large opinions from PC1 characterize sounds with lots of syllables and many changes ranging from syllable designs (Table 3). High beliefs away from PC2 define songs with many different syllable models install inside an organized sentence structure.
This new composition out-of audio sung each day (both within duets and as solos) did not differ of the intercourse (Desk 4). The significant effectation of seasons into PC1 demonstrates that non-breeding season music were offered and you will contained alot more changes than just did breeding year tunes. Responses had been described as less syllables and transitions than simply both solos otherwise initiations, but solos and you can initiations was mathematically indistinguishable (Tukey’s article-hoc decide to try from LS setting: address compared to. initiation: t-proportion = ?step 3.90, df = 614, p = 0.0003; respond to against. solo: t-ratio = ?cuatro.06, df = 613, p = 0.0002; initiation against. solo: t-ratio = 0.23, df = 606, p = 0.97).
Table 4. Linear combined impact patterns mean this new relative results of intercourse (person), seasons (reproduction otherwise non-breeding), role (solamente, duet initiation, otherwise respond to) and you will period (start otherwise day) on structural regularity, temporal, and you can structure measurements of troupial audio.
There can be a serious character-by-year interaction on PC2 design. Examination of new telecommunications area revealed that anywhere between-12 months changes in initiations was an important driver of this interaction (Figure cuatro). Continua a leggere