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- Title
Estimating target strength of young chum salmon (Oncorhynchus keta).
- Authors
Minami, Kenji; Shirakawa, Hokuto; Kawauchi, Yohei; Shao, Huamei; Tomiyasu, Makoto; Iwahara, Yuka; Tsuda, Yuichi; Takahara, Hideo; Zhu, Yanhui; Miyashita, Kazushi
- Abstract
Although chum salmon (Oncorhynchus keta) is an important fishery resource in Japan, acoustic methods cannot be applied to biomass estimation because the target strength (TS) is unknown. This study clarified the TS for each fork length (FL: 5.5–33.5 cm) of young chum salmon inhabiting the Japanese coastal area to the Bering Sea by measuring free-swimming fish. The size dependences of the TS values were TSmean = 20 log10 FL – 68.0, for both 38 and 120 kHz. This facilitated the estimation of biomass of young salmon using acoustic methods.
- Subjects
JAPAN; ONCORHYNCHUS; BIOMASS estimation; FISHERY resources; ACOUSTIC emission testing
- Publication
Canadian Journal of Fisheries & Aquatic Sciences, 2022, Vol 79, Issue 2, p195
- ISSN
0706-652X
- Publication type
Article
- DOI
10.1139/cjfas-2021-0181