Main characteristics of arrowworms in the Bering Sea (species composition, distribution, biomass, production)
https://doi.org/10.26428/1606-9919-2021-201-416-424
Abstract
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.
About the Author
К. M. Gorbatenko
VNIRO (TINRO)
Russian Federation
Russian Federation
Gorbatenko Konstantin M., D.Biol., principal researcher, Pacific branch
4, Shevchenko Alley, Vladivostok, 690091
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For citations:
Gorbatenko К.M. Main characteristics of arrowworms in the Bering Sea (species composition, distribution, biomass, production). Izvestiya TINRO. 2021;201(2):416-424. (In Russ.) https://doi.org/10.26428/1606-9919-2021-201-416-424
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