Diel and ontogenetic variations in vertical distributions of large grazing copepods during the spring phytoplankton bloom in the Oyashio region

Yamaguchi, Atsushi; Onishi, Yuka; Kawai, Momoka; Omata, Aya; Kaneda, Mariko; Ikeda, Tsutomu

doi:10.1016/j.dsr2.2010.03.013

Cited by 11 publications

(4 citation statements)

References 45 publications

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“…In contrast to C. pacificus, during springsummer E. californicus lives somewhat deeper in the water column, just below the mixed layer (Ohman et al, 1998). This vertical distribution recalls that of its congener Eucalanus bungii in the Subarctic Pacific, which, together with Neocalanus cristatus, resides somewhat deeper than other particle-grazing copepods (Neocalanus plumchrus and Neocalanus flemingeri, Mackas et al, 1993), although E. bungii adults can occur near the surface in spring in the Oyashio region (Yamaguchi et al, 2010). An expected consequence of residence below the mixed layer in the California Current System is that the phytoplankton prey available to E. californicus would likely come from a somewhat deeper depth than those commonly encountered by C. pacificus (or would arrive in the form of sinking particles).…”

Section: Temporal Changesmentioning

confidence: 78%

Multi-decadal variations in stable N isotopes of California Current zooplankton

Ohman

Rau

Hull

2012

Deep Sea Research Part I: Oceanographic Research Papers

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright

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Section: Temporal Changesmentioning

confidence: 78%

Multi-decadal variations in stable N isotopes of California Current zooplankton

Ohman

Rau

Hull

2012

Deep Sea Research Part I: Oceanographic Research Papers

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“…In the high latitudes, some observations have found that DVM may stop during periods of midnight sun and polar night (Blachowiak‐Samolyk et al, ; Falkenhaug et al, ; Fischer & Visbeck, ) although this remains controversial (Berge et al, ; Cottier et al, ). During wintertime, many species perform ontogenetic seasonal migrations and reside in the mesopelagic domain (Shimode et al, ; Yamaguchi et al, ). Thus, overlaps might exist in reality between the three modeled communities in contrast to what is assumed in the model.…”

Section: Discussionmentioning

confidence: 99%

Evaluating the Potential Impacts of the Diurnal Vertical Migration by Marine Organisms on Marine Biogeochemistry

Aumont

Maury

Lefort

et al. 2018

Global Biogeochemical Cycles

111

107

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Diurnal vertical migration (DVM) of marine organisms is an ubiquitous phenomenon in the ocean that generates an active vertical transport of organic matter. However, the magnitude and consequences of this flux are largely unknown and are currently overlooked in ocean biogeochemical models. Here we present a global model of pelagic ecosystems based on the ocean biogeochemical model NEMO‐PISCES that is fully coupled to the upper trophic levels model Apex Predators ECOSystem Model, which includes an explicit description of migrating organisms. Evaluation of the model behavior proved to be challenging due to the scarcity of suitable observations. Nevertheless, the model appears to be able to simulate approximately both the migration depth and the relative biomass of migrating organisms. About one third of the epipelagic biomass is predicted to perform DVM. The flux of carbon driven by DVM is estimated to be 1.05 ± 0.15 PgC/year, about 18% of the passive flux of carbon due to sinking particles at 150 m. Comparison with local studies suggests that the model captures the correct magnitude of this flux. Oxygen is decreased in the mesopelagic domain by about 5 mmol m−3 relative to simulations of an ocean without DVM. Our study concludes that DVM drives a significant and very efficient flux of carbon to the mesopelagic domain, similar in magnitude to the transport of DOC. Relative to a model run without DVM, the consequences of this flux seem to be quite modest on oxygen, due to compensating effects between DVM and passive fluxes.

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“…Although Kurita and Sugisaki (2004) and Sugisaki and Kurita (2004) reported gut content weight to be higher at dusk, the present study indicated that active feeding time was different by prey taxa and/or ocean area. Because the diurnal vertical migration is unclear or small in Neocalanus copepods (Mackas et al., 1993; Yamaguchi et al., 2010), Pacific saury might be able to access these preys through the day. Thus, these time‐of‐day differences might be also linked to behavior and feeding activity in Pacific saury.…”

Section: Discussionmentioning

confidence: 99%

Geographic variation in feeding of Pacific saury Cololabis saira in June and July in the North Pacific Ocean

Miyamoto

Vijai

Kidokoro

et al. 2020

Fisheries Oceanography

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Gut contents of Pacific saury Cololabis saira during their feeding migration through a transition zone between subtropical and subarctic waters in the North Pacific Ocean are reported. Geographic changes in feeding habits and preferences are described for the months of June and July, for the years 2012, 2016, and 2017. Pacific saury prey comprised 27 taxa. Cluster analysis based on numerical abundance of these prey taxa in guts indicated six Pacific saury feeding types (A to F) existed. Of these, types A–E occurred in low sea surface temperature waters (ca 14°C). Feeding patterns reveal N. plumchrus/flemingeri tended to be important prey species in areas west of ca 175°E, whereas Pacific saury feed mainly and selectively on N. cristatus in eastern areas, indicating a longitudinal difference in the trophic pathway from zooplankton prey to Pacific saury. These spatial differences in trophic pathways improve our understanding of nutritional intake in the commercially important Pacific saury during its feeding migration, and the effects this might have on fish size and weight, and associated commercial value.

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Diel and ontogenetic variations in vertical distributions of large grazing copepods during the spring phytoplankton bloom in the Oyashio region

Abstract: 11Short-term changes in vertical distributions of copepods during the spring 12 phytoplankton bloom were analyzed based on day and night vertically stratified 13 sampling (9 strata between 0-1000 m) with a fine-mesh (60 µm

Cited by 11 publications

References 45 publications

Multi-decadal variations in stable N isotopes of California Current zooplankton

Multi-decadal variations in stable N isotopes of California Current zooplankton

Evaluating the Potential Impacts of the Diurnal Vertical Migration by Marine Organisms on Marine Biogeochemistry

Geographic variation in feeding of Pacific saury Cololabis saira in June and July in the North Pacific Ocean

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