The Seasonal Dynamics of the Abundance and Species Composition of Nekton in the Upper Epipelagic Layer of the Western Bering Sea

2017 ◽  
Vol 43 (7) ◽  
pp. 535-554 ◽  
Author(s):  
A. A. Somov
Keyword(s):  
Species Composition ◽  
Bering Sea ◽  
Seasonal Dynamics ◽  
Western Bering Sea ◽  
Upper Epipelagic Layer ◽  
Epipelagic Layer

scholarly journals Feeding of smoothtongue Leuroglossus schmidti in the Bering, Okhotsk Seas and adjacent waters of the Pacific Ocean

2016 ◽  
Vol 184 (1) ◽  
pp. 150-157
Author(s):  
Alexander Ya. Efimkin
Keyword(s):  
Bering Sea ◽  
Mesopelagic Fish ◽  
The North ◽  
Important Prey ◽  
The Pacific ◽  
Upper Epipelagic Layer ◽  
The Pacific Ocean ◽  
The North Pacific ◽  
Epipelagic Layer ◽  
The Bering Sea

Smoothtongue Leuroglossus schmidti is a small mesopelagic fish species common for subarctic waters. It rises to the upper epipelagic layer at night for feeding and preys mainly on euphausiids, copepods and amphipods. Its mean index of stomach fullness reaches 68 ‱ in the epipelagic layer, but it almost doesn’t feed deeper than 200 m, judging by a little food in the stomach. In the Bering Sea, euphausiids dominate in its diet and the portion of copepods is small. In the ​​Okhotsk Sea, each of these two groups provides a half of the diet. In the North Pacific, the portion of copepods is 63 % on average, euphausiids are the second important prey, and amphipods occur in the diet occasionally. Daily ration of smoothtongue is about 1.4 %.

scholarly journals Main characteristics of arrowworms in the Bering Sea (species composition, distribution, biomass, production)

2021 ◽  
Vol 201 (2) ◽  
pp. 416-424
Author(s):  
К. M. Gorbatenko
Keyword(s):  
Species Composition ◽  
Biomass Production ◽  
Bering Sea ◽  
Mesh Size ◽  
Zooplankton Biomass ◽  
Total Zooplankton ◽  
Composition Distribution ◽  
Total Zooplankton Biomass ◽  
Epipelagic Layer ◽  
The Bering Sea

 Zooplankton was sampled from the epipelagic layer (0–200 m) in the Bering Sea using Jedae net (mouth 0.1 m2, mesh size 0.168 mm) in 1986–2018. Arrowworms were the most numerous predators, represented with 3 species: Parasagitta elegans, Eukrohnia hamata, and Pseudosagitta maxima. Their summary biomass was 215.7 mg/m3, on average (26.3 % of the total zooplankton biomass), and varied seasonally from 105.9 mg/m3 in winter to 311.8 mg/m3 in autumn. Parasagitta elegans dominated absolutely (> 99 % WW). Mean stock of this species was 64.36. 106 t; its seasonal yield was estimated as 22.1. 106 t in winter, 78.5. 106 t in spring, 191.9. 106 t in summer, and 130.3. 106 t in autumn, so its mean production was 422.8. 106 t WW per year.

Hydrography and biological resources in the western Bering Sea

2013 ◽  
Vol 94 ◽  
pp. 106-120 ◽  
Author(s):  
G.V. Khen ◽  
E.O. Basyuk ◽  
N.S. Vanin ◽  
V.I. Matveev
Keyword(s):  
Bering Sea ◽  
Biological Resources ◽  
Western Bering Sea
Sign in / Sign up

Export Citation Format

Share Document