Post-spring-bloom feeding rates of krill Euphausia pacifica (Euphausiacea) in the Oyashio region, western North Pacific

2020 ◽  
Vol 181 ◽  
pp. 102245
Author(s):  
Yuji Okazaki ◽  
Kazutaka Takahashi ◽  
Yuichiro Nishibe ◽  
Mutsuo Ichinomiya
Keyword(s):  
North Pacific ◽  
Western North Pacific ◽  
Spring Bloom ◽  
Feeding Rates ◽  
Euphausia Pacifica ◽  
Oyashio Region

scholarly journals Draft Whole-Genome Sequence of Triparma laevis f. inornata (Parmales, Bolidophyceae), Isolated from the Oyashio Region, Western North Pacific Ocean

2020 ◽  
Vol 9 (33) ◽  
Author(s):  
Akira Kuwata ◽  
Kenji Saitoh ◽  
Yoji Nakamura ◽  
Mutsuo Ichinomiya ◽  
Naoki Sato
Keyword(s):  
Pacific Ocean ◽  
Genome Sequence ◽  
North Pacific ◽  
Western North Pacific ◽  
North Pacific Ocean ◽  
Sister Group ◽  
Whole Genome Sequence ◽  
Whole Genome ◽  
Western North Pacific Ocean ◽  
Oyashio Region

ABSTRACT We present the first draft whole-genome sequence for the Parmales (Bolidophyceae, Heterokonta), a picoplanktonic sister group of diatoms, using a Triparma laevis f. inornata strain that was isolated from the Oyashio region in the western North Pacific Ocean.

scholarly journals Decline and Bidecadal Oscillations of Dissolved Oxygen in the Oyashio Region and Their Propagation to the Western North Pacific

2018 ◽  
Vol 32 (6) ◽  
pp. 909-931 ◽  
Author(s):  
Daisuke Sasano ◽  
Yusuke Takatani ◽  
Naohiro Kosugi ◽  
Toshiya Nakano ◽  
Takashi Midorikawa ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
North Pacific ◽  
Western North Pacific ◽  
Oyashio Region

scholarly journals Metabolism and chemical composition of mesopelagic ostracods in the western North Pacific Ocean

2004 ◽  
Vol 61 (4) ◽  
pp. 535-541 ◽  
Author(s):  
Hideki Kaeriyama ◽  
Tsutomu Ikeda
Keyword(s):  
Oxygen Consumption ◽  
North Pacific ◽  
Western North Pacific ◽  
North Pacific Ocean ◽  
Standing Stock ◽  
Oyashio Region ◽  
Mesopelagic Zone ◽  
Poc Flux ◽  
Consumption Rates

Abstract Oxygen consumption rates and bodily elemental composition (carbon (C) and nitrogen (N)) were determined on three dominant ostracods (Discoconchoecia pseudodiscophora, Orthoconchoecia haddoni, and Metaconchoecia skogsbergi) from the mesopelagic zone of the Oyashio region. Specific oxygen consumption rates of the three species at near in situ temperature (3°C) were similar (0.39 μl O2 mg DW−1 h−1), but bodily C composition and C:N ratios of D. pseudodiscophora were significantly higher than those of the other two species. Metabolic comparison in terms of “daily body C loss” or “adjusted metabolic rate” revealed that metabolic rates of the ostracods are 0.3–0.4 times those of other zooplankton at comparable temperature conditions. The present results were combined with standing stock data of each ostracod in the Oyashio region to estimate their POC ingestion. Our calculation indicates annual ingestion by the ostracods to be 875 mgC m−2 yr−1, which equates to 3.7% of annual POC flux reaching 200–600-m depth (mid-point: 400-m depth) in this region.

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