Table 1.

Influences of temperature, fish size and season (equivalent to changes in sonic muscle mass) on acoustic parameters of weakfish disturbance calls

Acoustic parameters
VariableRepetition rate of pulses within a callSound pressure level (amplitude)Dominant frequencyPulse duration
Increasing temperatureIncreaseIncreaseIncreaseDecrease
Increasing total fish lengthNo changeIncreaseDecreaseIncrease
Increasing sonic muscle massNo changeIncreaseNo changeSlight increase
  • All changes were significant (α=0.05) as determined by linear regressions.

    Data from Connaughton et al. (1997, 2000).