Target strength of juvenile Antarctic silverfish (Pleuragramma antarcticum)

Abstract

In this study, the target strength for multi-frequency (38 kHz, 120 kHz, 200 kHz) of juvenile silverfish (Pleuragramma antarcticum) was estimated using by the KRM (Kirchhoff-ray mode) model. The body shape of the silverfish was described by a picture and the body length of nine individuals ranged in 1.8 cm to 8.8 cm. The maximum TScm according to the total length for the constant term (b20) was ？92.93 dB at 38 kHz, ？ 86.63 dB at 120 kHz, and ？85.89 dB at 200 kHz, respectively. The averaged TScm according to total length for the constant term (b20) was ？100.0 dB at 38 kHz, ？93.0 dB at 120 kHz, and ？106.9 dB at 200 kHz, respectively.