Abstract
The purpose of this study is to obtain the most basic data, acoustic scattering characteristic of the greenling (Hexagrammos otakii) TS was measured in acoustic seawater tank (5 m(L) × 5 m(H) × 5 m(D)) at the fisheries science institute of Chonnam National University, Korea. Acoustic data was collected with a 70 kHz and 120 kHz quantitative echo sounder. The echo sounder is installed on the water tank, and the camera is installed on the side of the water tank and recorded every 0.5 seconds. The greenling was ranged from 19.5 to 34.5 cm in length and from 75.02 to 557.54 g in wet weight. The relationship between fish total length and TS were as follows : TS70 kHz = 37.79log(L)-100.52 (R² = 0.62) and TS120 kHz = 21.79log(L)-78.55 (R² = 0.77). This data can be provided as a basis for estimating density and biomass of greenling.
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