Измерение силы цели минтая (Theragra chalcogramma) Авачинского залива на частотах 38 и 120 кГц

Target strength (TS) measurements in situ of walleye pollock have been made using 38 and 120 kHz split beam echosounders. The target strength measured at 120 kHz is around 2.3 dB lower than at 38 kHz. The TS to fork length (FL) relationship for walleye pollock in the Avacha Gulf TS = 20·log 10 (FL) 62 is proposed for both 38 and 120 kHz equipment.