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Table 1.

Number of calls analysed, mean and standard deviation of variables measured in the barking calls of male Australian sea lions and male subantarctic fur seals

Male Australian sea lion
Male subantarctic fur seal
VariableMean ± s.d.N (calls; indiv)Mean ± s.d.N (calls; indiv)
Dur (ms) 46±16 260; 13 90±19 48; 6 
Interval Dur (ms) 191±36 260; 13 301±53 48; 6 
Peak 1 (Hz) 934±480 260; 13 489±203 48; 6 
Peak 2 (Hz) 1362±598 260; 13 911±285 48; 6 
RAMP 2.15±1.81 260; 13 2.21±1.21 48; 6 
Male Australian sea lion
Male subantarctic fur seal
VariableMean ± s.d.N (calls; indiv)Mean ± s.d.N (calls; indiv)
Dur (ms) 46±16 260; 13 90±19 48; 6 
Interval Dur (ms) 191±36 260; 13 301±53 48; 6 
Peak 1 (Hz) 934±480 260; 13 489±203 48; 6 
Peak 2 (Hz) 1362±598 260; 13 911±285 48; 6 
RAMP 2.15±1.81 260; 13 2.21±1.21 48; 6 

Dur, total duration of the barking call; Interval Dur, duration between barking calls; Peak 1 and 2, frequency value of the first and second maximum peak in amplitude, respecively; RAMP, ratio of the amplitude values of Peak 1 to Peak 2

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