scholarly journals Origin and distribution of chum salmon Oncorhynchus keta stocks in the western Bering Sea and North-West Pacific in 2009 and 2010

2014 ◽  
Vol 179 (4) ◽  
pp. 177-203
Author(s):  
Alexander V. Bugaev ◽  
Roman A. Shaporev ◽  
Alexander V. Zavolokin
Keyword(s):  
Bering Sea ◽  
Chum Salmon ◽  
Oncorhynchus Keta ◽  
West Pacific ◽  
North West ◽  
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.

scholarly journals Juveniles of pink and chum salmon in fall season (September-October 2013) in the western Bering Sea. Distribution, feeding, and strategy of growth

2015 ◽  
Vol 181 (2) ◽  
pp. 49-56
Author(s):  
Artem Е. Lazhentsev ◽  
Olga А. Maznikova
Keyword(s):  
Growth Rate ◽  
Body Size ◽  
Chemical Composition ◽  
Bering Sea ◽  
Coastal Waters ◽  
Chum Salmon ◽  
Linear Growth ◽  
Protein Food ◽  
Fall Season ◽  
Western Bering Sea

Ontogeny of one generation of pink and chum salmons is described for the period after the juveniles redistribution from coastal waters to deep-water areas in the western Bering Sea in September-October, 2013. They fed intensively; their diet included hyperiids, pteropods and young euphausiids, i.e. the protein food with low lipid content and low caloricity. They spend only 20 % of their consumption for growth because of decreasing of the growth rate with body size increasing and significant energy expenditure for moving activity. Chemical composition of the juveniles tissues was almost the same for both species, the muscle tissue was distinguished by low fat content, without interspecies differences. So, fat accumulation doesn’t occur at this stage of ontogeny, the whole energy obtained from food is spent for moving, linear growth and metabolism.

Sign in / Sign up

Export Citation Format

Share Document