Fig. 4. Number of syllables per call series produced by common marmosets in
relation to the background noise level (dB re. 20 µPa). (A) Female:
rs=0.218, N=20, Pc=0.725; (B)
Male 1: rs=0.409, N=14,
Pc=0.383; (C) Male 2: rs=0.285,
N=14, Pc=0.689; (D) Male 3:
rs=0.144, N=9,
Pc=0.9919.