Feeding and daily ration of the chum salmon Oncorhynchus keta in the western Bering Sea in the summer-fall of 2004

2008 ◽  
Vol 34 (1) ◽  
pp. 17-27 ◽  
Author(s):  
N. S. Kosenok ◽  
S. V. Naidenko
Keyword(s):  
Bering Sea ◽  
Chum Salmon ◽  
Oncorhynchus Keta ◽  
Daily Ration ◽  
Chum Salmon Oncorhynchus Keta ◽  
Western Bering Sea

Estimating target strength of young chum salmon (Oncorhynchus keta)

2022 ◽  
pp. 1-5
Author(s):  
Kenji Minami ◽  
Hokuto Shirakawa ◽  
Yohei Kawauchi ◽  
Huamei Shao ◽  
Makoto Tomiyasu ◽  
...  
Keyword(s):  
Bering Sea ◽  
Chum Salmon ◽  
Fork Length ◽  
Target Strength ◽  
Oncorhynchus Keta ◽  
Biomass Estimation ◽  
Fishery Resource ◽  
Chum Salmon Oncorhynchus Keta ◽  
Acoustic Methods ◽  
The Bering Sea

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.

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