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.

• 이사라(전남대학교 수산과학과 학생) | Sara LEE (Student, Division of Fisheries Science, Chonnam National University)
• 오우석(전남대학교 수산과학과 학생) | Wooseok OH (Student, Division of Fisheries Science, Chonnam National University)
• 나형술(한국해양과학기술원 극지연구소 해양연구본부 책임연구원) | Hyoung Sul LA (Principal Research Scientist, Division of Ocean Sciences, Korea Polar Research Institute)
• 손우주(한국과학기술연합대학교대학원 극지과학과 학생) | Wuju SON (Student, Department of Polar Science, University of Science and Technology)
• 김정훈(극지연구소 생명과학연구본부 연구원) | Jeong-Hoon KIM (Scientist, Division of Life Sciences, Korea Polar Research Institute)
• 이경훈(전남대학교 해양생산관리학과 교수) | Kyounghoon LEE (Professor, Department of Marine Production Management, Chonnam National University) Corresponding Author