In situ TS measurement of Mackerel Scad (Decapterus macarellus), Leopard Coral Trout (Plectropomus leopardus), and Largehead Hairtail (Trichiurus lepturus)

2nd International Conference on Marine Science: Better Insight for the Healthy Ocean

Setiawan, W.^1 ; Jaya, I.^1 ; Hestirianoto, T.^1 ; Pujiati, S.^1 ; Priatna, A.^2 ; Ma'Mun, A.^2

Dept. Marine Science and Technology, Bogor Agricultural University, Indonesia^1

Marine Fisheries Research Center, Ministry of Marine and Fisheries Affairs, Indonesia^2

关键词: Acoustic targets;    Best fit;    Demersal fish;    Fish sizes;    Fork lengths;    Indonesia;    Small pelagic fish;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/176/1/012031/pdf
DOI  :  10.1088/1755-1315/176/1/012031

来源: IOP

【 摘 要 】

Acoustic target strength (TS) measurements were performed on one small pelagic fishes, and two demersal fishes, which are very important for Indonesia fisheries, namely: mackerel scad (Decapterus macarellus), coral trout (Plectropomus leopardus), and largehead hairtail (Trichiurus sp.) on various fish sizes (fork length, FL) and orientation. The fish was successfully measured using tethered technique, where each individual fish was places and hang in web using monofilament string. The TS data analysis is performed numerically using the best-fit technique to establish the relationship between length, fish orientation, and TS. The TS-length relationship was obtained as follow: for mackerel scad, TS = TS = 20log - 84,38; for coral trout, TS = 20Log - 76,68, and for large headhairtail, TS = 20Log -91.88.