Estimating and monitoring the stock size of sandfish Arctoscopus japonicus in the northern Sea of Japan

Watanabe, Kyuji; Sugiyama, Hideki; Sugishita, Shigeo; Suzuki, Naoki; Sakuramoto, Kazumi

doi:10.1111/j.1444-2906.2005.01027.x

Cited by 13 publications

(17 citation statements)

References 2 publications

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“…MLD in the Sea of Japan increases during winter-spring (Hirai 1995) corresponding to NSJ life-stages (eggs-juveniles) (Okiyama 1990). CWSJ increased with increasing SSB and winter water temperatures at depths > 150 m in areas D and E in the past, with which MLD correlates positively and significantly (Watanabe et al 2006) (Fig. 1).…”

Section: Introductionmentioning

confidence: 81%

“…The biomass of NSJ (BNSJ) was >30 000 tonnes in 1965-1975(Watanabe et al 2005a and was similar to the total catch of WSJ (CWSJ) (Fig. 2), which was the adequate abundance index of WSJ because these catches correlated significantly with the density index as per the offshore fishery (Watanabe et al 2006). However, since 1980, BNSJ declined alarmingly to 246 tonnes in 1991, and fishermen in Akita Prefecture eventually introduced a voluntary fishing moratorium in 1992-1994 (Sugiyama 1998).…”

Section: Introductionmentioning

confidence: 94%

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Dynamics of two sailfin sandfish (Arctoscopus japonicus) stocks in the Sea of Japan, and their management

Watanabe

Sakuramoto

Sugiyama

et al. 2011

Can. J. Fish. Aquat. Sci.

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The dynamics of the northern and western Sea of Japan sailfin sandfish (Arctoscopus japonicus) stocks (NSJ and WSJ, respectively) varied simultaneously until the mid-1970s but differently thereafter. To identify the mechanisms underlying these dynamics, we evaluated the impact of environment and harvesting on NSJ by developing a recruitment model and simulating NSJ dynamics. The model was constructed based on egg production, density effect, and water temperatures in winter and spring, which correlated significantly and positively with the estimated surface mixed-layer depth. Winter water temperatures and egg production were variables common to the two stocks. Our results suggest that simultaneous dynamics resulted from similarities in variations in winter water temperatures for each stock and the difference in dynamics resulted from NSJ depletion caused by overfishing. We suggest management strategies to prevent NSJ depletion caused by unfavorable environmental conditions and overfishing, as well as to allow improved biomass recovery while taking advantage of favorable environmental conditions, and avoid further exploitation of previously depleted NSJ.Résumé : Les dynamiques des stocks du toroumoque japonais (Arctoscopus japonicus) du nord et de l'ouest de la mer du Japon (respectivement NSJ et WSJ) ont varié de concert jusqu'au milieu des années 1970 pour différer par la suite. Afin d'identifier les mécanismes sous-jacents à ces dynamiques, nous avons évalué l'impact de l'environnement et de la récolte sur le stock NSJ en mettant au point un modèle de recrutement et en simulant la dynamique du stock NSJ. Le modèle est construit sur la base de la production d'oeufs, de l'effet de la densité, et des températures de l'eau en hiver et au printemps, qui sont en corrélation significative et positive avec la profondeur estimée de la couche de mélange de surface. Les tempé-ratures de l'eau en hiver et la production d'oeufs sont des variables qui s'appliquent aux deux stocks. Nos résultats indiquent que la dynamique simultanée résulte de ressemblances dans les variations dans les températures d'hiver pour les deux stocks et que les différences de dynamique s'expliquent par un déclin du stock NSJ à cause de la surpêche. Nous proposons des stratégies de gestion pour empêcher le déclin du stock NSJ causé par les conditions environnementales défa-vorables et la surpêche, ainsi que pour permettre une meilleure récupération de la biomasse en profitant des conditions environnementales favorables et pour éviter une exploitation supplémentaire du stock NSJ déjà réduit.[Traduit par la Rédaction]

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Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 94%

Dynamics of two sailfin sandfish (Arctoscopus japonicus) stocks in the Sea of Japan, and their management

Watanabe

Sakuramoto

Sugiyama

et al. 2011

Can. J. Fish. Aquat. Sci.

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“…The sandfish stock in the northern area of Honshu decreased suddenly in the middle of the 1970s and almost collapsed in the 1980s (for the commercial catch, see Fig. 1C); in the latter half of the 1990s and thereafter, it has gradually increased, partly because of the fishing moratorium in Akita Prefecture for 3 years (Sakuramoto et al, 1997;Watanabe et al, 2005). During the fluctuation of population size, extensive fry releasing has been performed; it was said to reach 5 million fishes per year or more (http:// www.pref.akita.jp/).…”

Section: Discussionmentioning

confidence: 96%

Population structure of the sailfin sandfish, Arctoscopus japonicus (Trichodontidae), in the Sea of Japan

Shirai

Kuranaga

Sugiyama³

et al. 2006

Ichthyol Res

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We analyzed patterns of genetic diversity in the sailfin sandfish (Arctoscopus japonicus), focusing on population subdivisions within the Sea of Japan. We observed 270 specimens from nine sampling sites in 1999-2000, i.e., seven sites in the Sea of Japan and two sites from the Pacific coast of Hokkaido. An additional site (30 specimens) was sampled from eastern Korea in the spawning season of 2004 for comparison. Forty haplotypes, compiled into three haplogroups (A-C), were detected based on the comparison of a 400-bp sequence of the anterior part of the mitochondrial control region. In accordance with previous hypotheses from morphological and molecular analyses, genetic discontinuity between the Sea of Japan and the Pacific coast of Hokkaido was conspicuous. Within the Sea of Japan, eight sampling sites were not genetically uniform, and most of the variations among sites were detected between eastern Korea [the "eastern Korea" (EK) population: distributed from the Korean Peninsula to Mishima, Yamaguchi Prefecture] and the other sites along the coast of Japan [the "western Japan" (WJ) population: from Oki Islands to western Hokkaido] (Φ CT = 0.096, P = 0.0183). The WJ population, having lower genetic variability, showed significant departure from neutrality, indicating influences through a recent population expansion. The period of the expansion can be estimated to have begun on the order of 10 4 years ago. We consider that the present Japan Sea populations have been formed through the invasion of a small ancestral stock to the Sea of Japan and its population expansion during the last glacial period or later. On the other hand, we failed to detect distinct evidence of a population expansion in the EK population. Haplogroup C, detected in a high frequency in this population, was estimated to have mixed with haplogroup A after rapid differentiations of the latter. Therefore, the EK population, strongly influenced by such a mixture, might possess haplogroup C in a higher frequency and a different haplotype composition from the WJ population.

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“…(Byoung et al, 2014) ( Yang et al, 2008;Lee et al, 2006;Myoung et al, 2002) . (Watanabe et al, 2005;Sakuramoto et al, 2001) ( ) . , ,…”

Section: 서 론 (Arctoscopus Japoncus)mentioning

confidence: 99%

Physiochemical Characteristics of Rapidly Processed Salt-fermented Sandfish Arctoscopus japoncus Sauce with Thermophilic bacillus

Nam¹,

Jang²,

Park³

et al. 2015

Korean Journal of Fisheries and Aquatic Sciences

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Estimating and monitoring the stock size of sandfish Arctoscopus japonicus in the northern Sea of Japan

Cited by 13 publications

References 2 publications

Dynamics of two sailfin sandfish (Arctoscopus japonicus) stocks in the Sea of Japan, and their management

Dynamics of two sailfin sandfish (Arctoscopus japonicus) stocks in the Sea of Japan, and their management

Population structure of the sailfin sandfish, Arctoscopus japonicus (Trichodontidae), in the Sea of Japan

Physiochemical Characteristics of Rapidly Processed Salt-fermented Sandfish Arctoscopus japoncus Sauce with Thermophilic bacillus

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