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Tight coupling between primary productivity, export production, and the growth of benthic scallops in the coastal region of the Okhotsk Sea along Hokkaido

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Title: Tight coupling between primary productivity, export production, and the growth of benthic scallops in the coastal region of the Okhotsk Sea along Hokkaido
Authors: Terumoto, Takayuki Browse this author
Kudo, Isao Browse this author →KAKEN DB
Miyoshi, Koji Browse this author
Shinada, Akiyoshi Browse this author
Miyazono, Akira Browse this author
Keywords: Coscinodiscus
export production
pelagic-benthic coupling
sediment trap
Issue Date: May-2022
Publisher: John Wiley & Sons
Journal Title: Fisheries oceanography
Volume: 31
Issue: 2
Start Page: 205
End Page: 216
Publisher DOI: 10.1111/fog.12572
Abstract: Scallop culture is conducted worldwide, nonfeeding and depending on the natural phytoplankton production for the diet. It is necessary for sustainable culture of this species to understand how the phytoplankton production and subsequent vertical transport to the bottom (export production) are regulated by environmental factors. A 3-year time series monitoring of chlorophyll and temperature, as well as sinking particle flux, was conducted to elucidate the relationship between surface primary production, the subsequent export, and the growth of benthic cultured scallops in spring in the coastal region of the Okhotsk Sea along Hokkaido, Japan. Five times larger export fluxes were observed in 2013 than those in other years. Coscinodiscus spp., diameter >200 mu m, was the quantitatively dominant phytoplankton in 2013. This species contributed to the high export flux due to a higher settling velocity. The sudden drops in temperature by >2 degrees C were observed during the study period. These indicated that the supply of nutrients from Intermediate Cold Water (ICW), a cold and nutrients rich water mass, accelerated the primary productivity in this area. This intensity was strongest in 2013, contributing to the high export flux. The large export flux in 2013 provided a more sufficient food to the benthic cultured scallops, resulting in a two times higher growth of the scallops than in other years. This study demonstrated that the size of the dominant diatom species and the supply from ICW strongly influenced the export ratio and the growth of cultured scallops.
Rights: This is the peer reviewed version of the following article:, which has been published in final form at 10.1111/fog.12572. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
Type: article (author version)
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 工藤 勲

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