Larval and juvenile growth of chub mackerel Scomber japonicus in relation to recruitment in the western North Pacific

Kamimura, Yasuhiro; Takahashi, Masanori; Yamashita, Norio; Watanabe, Chiho; Kawabata, Akiko

doi:10.1007/s12562-015-0869-4

Cited by 48 publications

(49 citation statements)

References 23 publications

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“…As recruitment of chub mackerel is thought to be strongly affected by the temperature of larvae and juveniles, through effects on their growth rate (Kamimura et al., ), we investigated the relationship between RPS and the estimated temperature (ET) on the particles from the particle tracking experiments. The results of the particle tracking showed considerable year‐to‐year variation in the transport efficiency and ET (Figure ).…”

Section: Resultsmentioning

confidence: 99%

“…In this study, we investigated the contrasting effects of temperature on the recruitment of chub mackerel reported in previous studies: a positive effect (e.g., Kamimura et al., ) and a negative effect (e.g., Yatsu et al., ). We found both relationships in different seasons (Figures and ).…”

Section: Discussionmentioning

confidence: 95%

“…Previous studies suggested that exposure of chub mackerel larvae to higher ambient temperatures may lead to higher growth and survival rates under non‐limiting prey abundance conditions (Iizuka, ; Hunter & Kimbrell, ; Kamimura, Takahashi, Yamashita, Watanabe, & Kawabata, ). Based on laboratory experiments, Hunter and Kimbrell () showed that the growth rate of chub mackerel larvae strongly depends on the temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Kamimura et al. () reported a significant positive correlation between recruitment per spawning stock biomass (RPS) and growth rate based on an analysis of otoliths from juveniles that were captured in the mixed water region from 2002–2012. These results indicate that exposure of chub mackerel larvae to higher temperatures could lead to higher recruitment levels via increased growth, at least within the range of 16–22°C.…”

Section: Introductionmentioning

confidence: 99%

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Dual effects of reversed winter–spring temperatures on year‐to‐year variation in the recruitment of chub mackerel (Scomber japonicus)

Kaneko

Okunishi

Seto

et al. 2018

Fisheries Oceanography

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To clarify the effects of temperature on the recruitment of chub mackerel (Scomber japonicus) in the North Pacific, we investigated the influence of winter surface temperature (WST) on spawners at the time of maturity around the spawning grounds and the influence of ambient spring temperature on larvae using estimated temperature (ET) obtained from particle tracking experiments. We found a significant positive correlation between ET approximately 10 days following hatching and the recruitment per spawning stock biomass (RPS) after 2000. The closer (more meandering) the Kuroshio Current (KC) axis was in relation to the spawning ground, the higher (lower) the spring surface temperature and the higher (lower) RPS was in the spawning ground. In contrast, WST inside KC near the maturity/spawning ground was significantly negatively correlated with RPS. A significant negative correlation between the temperatures in winter and spring was detected in the area after 2000, when the conditions of the Pacific decadal oscillation index and the stability of the Kuroshio Extension were synchronous, indicating that KC shifted northward during this time. The reversed temperature pattern was consistent with the winter–spring movement of KC axis in the offshore direction and was correlated with the winter–spring difference in the intensity of the Aleutian low. These results suggest that the annual variation in chub mackerel recruitment after 2000 was strongly affected by the combined effects of ambient temperature because of the reversal of conditions that occurred between winter and spring around the maturity/spawning ground, which was related to the KC path.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dual effects of reversed winter–spring temperatures on year‐to‐year variation in the recruitment of chub mackerel (Scomber japonicus)

Kaneko

Okunishi

Seto

et al. 2018

Fisheries Oceanography

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“…Moreover, mesoscale variability in the Kuroshio-Oyashio region is a key issue for Japanese fisheries and fisheries science, because many pelagic fish, which are important targets of Japanese fisheries, extensively use the Kuroshio-Oyashio region as spawning and nursery grounds. Among these are the Japanese sardine (Sardinops melanostictus) [31], Japanese anchovy (Engraulis japonicus) [32], Pacific saury (Cololabis sairai) [33], Japanese chub mackerel (Scomber japonicus) [34], Japanese common squid (Todarodes pacificus) [35], and various other species [36] [37]. For example, Japanese sardine adults migrate southward from the Oyashio to the Kuroshio region for spawning.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Japanese Fisheries Science in the Kuroshio-Oyashio Region through Development of the FRA-ROMS Ocean Forecast System: Overview of the Reproducibility of Reanalysis Products

Kuroda¹,

Setou²,

Kakehi³

et al. 2017

OJMS

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To address various fisheries science problems around Japan, the Japan Fisheries Research and Education Agency (FRA) has developed an ocean forecast system by combining an ocean circulation model based on the Regional Ocean Modeling System (ROMS) with three-dimensional variational analysis schemes. This system, which is called FRA-ROMS, is a basic and essential tool for the systematic conduct of fisheries science. The main aim of FRA-ROMS is to realistically simulate mesoscale variations over the Kuroshio-Oyashio region. Here, in situ oceanographic and satellite data were assimilated into FRA-ROMS using a weekly time window. We first examined the reproducibility through comparison with several oceanographic datasets with an Eulerian reference frame. FRA-ROMS was able to reproduce representative features of mesoscale variations such as the position of the Kuroshio path, variability of the Kuroshio Extension, and southward intrusions of the Oyashio. Second, using a Lagrangian reference frame, we estimated position errors between ocean drifters and How to cite this paper: Kuroda, H., Setou, T., Kakehi, S., Ito, S., Taneda, T., Azumaya, T., Inagake, D., Hiroe, Y., Morinaga, K., Okazaki, M., Yokota, T., Okunishi, T. 63particles passively transported by simulated currents, because particle tracking is an essential technique used in applications of reanalysis products to fisheries science. Finally, we summarize recent and ongoing fisheries studies that use FRA-ROMS and mention several new developments and enhancements that will be implemented in the near future.

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In situ observations of a doliolid bloom in a warm water filament using a video plankton recorder: Bloom development, fate, and effect on biogeochemical cycles and planktonic food webs

Takahashi

Ichikawa

Fukugama

et al. 2015

Limnology & Oceanography

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We investigated distribution patterns of a doliolid (Dolioletta gegenbauri) bloom in relation to the physical environment using a video plankton recorder in the Oyashio-Kuroshio mixed water region. Using 12 km transects, doliolid blooms were encountered at a horizontal scale of about 2-3 km, which corresponds to submesoscale physical events. Doliolids were also consistently encountered in the subsurface layer above the pycnocline in warmer (> 14 C) and higher-salinity (> 34) water masses, and seawater density was the most critical factor affecting distribution depth. Compared to previous studies, the density and biomass of the blooms observed in this study (77 mgC m 23 and 4600 inds m 23) were highest in the open ocean. Bloom formation consisted of two phases; first, the seeding population of a nurse stage increased rapidly to 2000 inds m 23 by asexual reproduction, followed by asexual production of phorozooids. Estimated population clearance rates revealed that these dense patches could potentially sweep the surrounding water within 2-3 d. The incidence of exhausted and shrunken zooids was significantly correlated with patch density, suggesting that mortality was due to overgrazing. Shrunken doliolids appeared to sink below the pycnocline, corresponding to 8-17% of the particulate organic carbon flux at 150 m. Hydromedusae, pelagic polycheates, and sapphirinid copepods preyed on the doliolids. These results indicate that doliolids, which were seeded by populations originating from the Kuroshio, formed dense blooms in response to submesoscale physical events and would alter the sinking particle properties (i.e., biological pump) and the epipelagic food web structure through their grazing and mortality.

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Larval and juvenile growth of chub mackerel Scomber japonicus in relation to recruitment in the western North Pacific

Cited by 48 publications

References 23 publications

Dual effects of reversed winter–spring temperatures on year‐to‐year variation in the recruitment of chub mackerel (Scomber japonicus)

Dual effects of reversed winter–spring temperatures on year‐to‐year variation in the recruitment of chub mackerel (Scomber japonicus)

Recent Advances in Japanese Fisheries Science in the Kuroshio-Oyashio Region through Development of the FRA-ROMS Ocean Forecast System: Overview of the Reproducibility of Reanalysis Products

In situ observations of a doliolid bloom in a warm water filament using a video plankton recorder: Bloom development, fate, and effect on biogeochemical cycles and planktonic food webs

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