Quantitative estimation of the ecosystem services supporting the growth of Japanese chum salmon

Chum salmon (Oncorhynchus keta) are distributed widely in the subarctic North Pacific. The Japanese stock is maintained by artificial release procedures. Chum salmon, including the Japanese stock, provide important ecosystem services for humans that are related to provisioning, culture and support....

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Bibliographic Details
Published in:Deep Sea Research Part II: Topical Studies in Oceanography
Main Authors: Karasawa, Yuka, Ueno, Hiromichi, Tanisugi, Ryo, Dobashi, Ryo, Yoon, Seokjin, Kasai, Akihide, Kiyota, Masashi
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier
Subjects:
Ecosystem services
Japanese chum salmon
Bioenergetics model
Lower trophic level ecosystem model
660
Bering Sea
Keta
Pacific
Subarctic
Online Access:http://hdl.handle.net/2115/85114
https://doi.org/10.1016/j.dsr2.2019.104702
Description
Summary:Chum salmon (Oncorhynchus keta) are distributed widely in the subarctic North Pacific. The Japanese stock is maintained by artificial release procedures. Chum salmon, including the Japanese stock, provide important ecosystem services for humans that are related to provisioning, culture and support. These ecosystem services are supported by the supply of prey and habitat that the fish use. We regard the supply of prey and habitat as supporting services for salmon. We developed a procedure to estimate supporting services quantitatively, based on the prey biomass consumed by individual salmon, by coupling a bioenergetics model and a lower trophic level ecosystem model. Using this procedure, we estimated the prey biomass consumed by a cohort of Japanese chum salmon released in a single year. The phytoplankton biomass indirectly consumed by a cohort was also estimated and considered to be the primary production supporting the fish. The Japanese chum salmon cohort was estimated to consume ca. 4.2-4.7 x 10(9) kg wet weight of zooplankton, of which more than half is eaten in the Bering Sea. The Japanese chum salmon cohort is supported by an estimated primary production of 2.0-2.2 x 10(9) kg C, which amounts to 0.17%-0.19% of primary production in the areas and periods through which the fish migrate. We also attempted to calculate the monetary value of supporting services for the growth of Japanese chum salmon.

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