Predicting the timing of Pacific saury (Cololabis saira) immigration to Japanese fishing grounds: A new approach based on natural tags in otolith annual rings

Miyamoto, Hiroomi; Suyama, Satoshi; Vijai, Dharmamony; Kidokoro, Hideaki; Naya, Miyako; Fuji, Taiki; Sakai, Mitsuo

doi:10.1016/j.fishres.2018.09.016

Cited by 19 publications

(20 citation statements)

References 14 publications

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“…Larvae and juveniles are abundant in southern waters off Honshu each year during winter (Watanabe and Lo 1989;Takasuka et al 2014), identifying the importance of this region as a winter spawning ground. Such wide latitudinal migrations have been validated only in age-1 fish (Suyama et al 2012b, Miyamoto et al 2019. However, we considered that some larger age-0 fish in the eastern area might possibly migrate to western areas to spawn; in contrast most age-0 fish that do not spawn in their first year do not migrate west.…”

Section: Discussionmentioning

confidence: 99%

“…The Tohoku National Fisheries Research Institute (TNFRI) has routinely performed stock assessment surveys from near the coast of Japan to 165°W during the months of June and July (Suyama et al 2016b). Pacific saury occur widely throughout the survey area during this time, after which age-1 fish commence a westward migration, with most reaching the Japanese fishing ground east of 150°E in the fishing season from August to December (Suyama et al 2012b, Miyamoto et al 2019. During two of these surveys (2013 and 2014) we collected and examined ovaries of Pacific saury from over a wide geographic area, and for each fish determined the presence or absence of VB-positive arterioles.…”

Section: Biologymentioning

confidence: 99%

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Geographical variation in spawning histories of age-1 Pacific saury Cololabis saira in the North Pacific Ocean during June and July

et al. 2019

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We examine geographical differences in percentages of age-1 Pacific saury Cololabis saira with previous spawning experience collected from 143°E to 165°W during June and July of 2013 and 2014. Previous spawning experience of fish was determined using a new histological method involving Victoria blue (VB)-positive ovarian arterioles. We also compared the radius of the otolith annual ring (ROA), which indicates fish body size at the beginning of the breeding season, with the incidence of previous spawning experience. A generalized linear model was used that treats the occurrence of fish with VBpositive arterioles as a response variable, following the Bernoulli distribution of probability p i , where longitude, latitude, body length, ROA in age-1 fish, year (2013 or 2014), sea surface temperature, and days elapsed from a survey starting date, are used as fixed effect terms. An estimated regression coefficient of longitude was negative while that of ROA was positive, meaning that the probability of previous spawning increases with a latitudinal progression west, and with increased ROA. Our results suggest that differences in the percentage of previously spawned fish in different geographic areas are caused by differences in body length at the beginning of the breeding season.

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Section: Discussionmentioning

confidence: 99%

Section: Biologymentioning

confidence: 99%

Geographical variation in spawning histories of age-1 Pacific saury Cololabis saira in the North Pacific Ocean during June and July

et al. 2019

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“…The Pacific saury Cololabis saira is one of the most commercially important migratory small pelagic fish species distributed in the North Pacific Ocean (Kosaka, 2000; Miyamoto et al, 2019). It is fished commercially by Japan, Russia, Korea, China, Taiwan, and Vanuatu, with total landings fluctuating from 180,973 tons in 1998 to 631,094 tons in 2014 (FAO, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The hypothetical migration routes and distribution of Pacific saury from early summer up to their main spawning season are summarized in Figure 1. In June and July, most of the Pacific saury are broadly distributed in the Transition zone of the western‐central North Pacific Ocean (Hashimoto et al, 2020; Miyamoto et al, 2019). In August, Pacific saury start to migrate southwest via the western North Pacific Ocean toward a spawning area formed broadly in subtropical waters from autumn to spring (Fukushima, 1979; Miyamoto et al, 2019; Watanabe & Lo, 1989).…”

Section: Introductionmentioning

confidence: 99%

Estimating the spawning ground of Pacific saury Cololabis saira by using the distribution and geographical variation in maturation status of adult fish during the main spawning season

Fuji

Kurita

Suyama

et al. 2020

Fisheries Oceanography

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We analyzed distribution and differences in body length, age, and maturation rate of Pacific saury Cololabis saira in the western North Pacific Ocean, during the main spawning season (winter), to locate its spawning ground. Sampling was conducted in the coastal area north of the Kuroshio axis (CA), the offshore area of the southern Japanese archipelago (SA), and the area east of the Honshu Island (EA) from 1996 to 2017. Higher densities of Pacific saury were widely observed on or just north (within 100–200 km) of the axis of the Kuroshio and the Kuroshio Extension currents. Body length, age composition, and sea‐surface temperature (SST) differed across the studied areas, with larger fish (>250 mm knob length, mainly age‐1) dominating at higher SST (16–21°C) in the SA and smaller fish (<250 mm knob length, age‐0) dominating at lower SST (14–16°C) in the EA. In the CA, both SST and body length values were in between those in the SA and EA. The area where matured Pacific saury were collected was broadly distributed in the study area, except for the CA and a part of the Transition zone where the SST was low and mean body length was short. This study suggests that the main spawning ground during winter, where the area of high density and high maturation rate overlap, is formed on or just north of the Kuroshio and the Kuroshio Extension axis.

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“…Pacific saury has a short 2‐year life span (Suyama, Kurita, & Ueno, 2006), over which time it migrates seasonally from subtropical to subarctic areas of the North Pacific Ocean (Fukushima, 1979). In June and July (hereafter “early summer”), it is widely distributed in and around a transition zone (TZ) between subarctic and subtropical areas of the North Pacific Ocean, and it migrates northward (Figure 1; Hashimoto et al., 2020; Kosaka, 2000; Miyamoto et al., 2019). The TZ is highly productive (Pearcy, 1996), and Pacific saury exploit it as a feeding ground, increasing their weight by feeding on abundant zooplankton (Odate, 1994); fish growth in this zone is greater during summer than it is during other seasons (Kurita, Nemoto, Oozeki, Hayashizaki, & Ida, 2004).…”

Section: Introductionmentioning

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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Predicting the timing of Pacific saury (Cololabis saira) immigration to Japanese fishing grounds: A new approach based on natural tags in otolith annual rings

Cited by 19 publications

References 14 publications

Geographical variation in spawning histories of age-1 Pacific saury Cololabis saira in the North Pacific Ocean during June and July

Geographical variation in spawning histories of age-1 Pacific saury Cololabis saira in the North Pacific Ocean during June and July

Estimating the spawning ground of Pacific saury Cololabis saira by using the distribution and geographical variation in maturation status of adult fish during the main spawning season

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

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