Changes in inferred spawning areas of Todarodes pacificus(Cephalopoda: Ommastrephidae) due to changing environmental conditions

Sakurai, Yasunori; Kiyofuji, Hidetada; Saitoh, Sei–Ichi; Goto, Tanjuro; Hiyama, Yoshiaki

doi:10.1006/jmsc.2000.0667

Cited by 189 publications

(181 citation statements)

References 8 publications

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“…In other words, recruitment success or failure echoes the environmental conditions experienced by the paralarvae. As a result, both physical (temperature) and biological (paralarval abundance) environmental variables have been found to be reliable proxies for forecasting the recruitment (Sakurai et al, 2000;Agnew et al, 2002;Roberts, 2005;Zeidberg et al, 2006). Importantly, larval transport has been identified to be an essential ingredient for the recruitment, as current patterns can transport and retain the offspring in suitable or unsuitable environments for their post-hatching survival, growth and development (Martins, 2009).…”

Section: Introductionmentioning

confidence: 99%

The São Paulo shelf (SE Brazil) as a nursery ground for Doryteuthis plei (Blainville, 1823) (Cephalopoda, Loliginidae) paralarvae: a Lagrangian particle-tracking Individual-Based Model approach

2013

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2014The São Paulo shelf (SE Brazil) as a nursery ground for Doryteuthis plei (Blainville, 1823) (Cephalopoda, Loliginidae) paralarvae: a Lagrangian particle-tracking individual-based model approach Hydrobiologia, Cham, v. 725, p. 57-68, 2014 Abstract The São Paulo shelf ranges from *23°S to 25°S, comprising nearly 622 km of shoreline. This region sustains historical landings of the tropical arrow squid Doryteuthis plei. As in other coleoid cephalopods, the broodstock dies following spawning and the continuance of the population relies exclusively upon the survival of the paralarvae, which are very sensitive to oceanographic conditions. As a first step towards the understanding of paralarval transport, the shelf area was evaluated in terms of retention/ dispersion potential. A Lagrangian particle-tracking Individual-Based Model was set up using a 3D Princeton Ocean Model model forced with in situ data obtained from July 2009 to July 2011. Neutrally buoyant particles were released every first day of every month in the model, and tracked for 30 days. The retention potential was high for particles released from the bottom all over the study area from the coast to the shelf break (200 m isobath). Offshore losses showed a marked seasonality. Regarding inshore losses, the percentage of particles beached was constant year round and smaller than offshore losses, being higher south of 24°S. Simulation results seem to agree with present knowledge of the reproductive behaviour of the species in the region.

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Section: Introductionmentioning

confidence: 99%

The São Paulo shelf (SE Brazil) as a nursery ground for Doryteuthis plei (Blainville, 1823) (Cephalopoda, Loliginidae) paralarvae: a Lagrangian particle-tracking Individual-Based Model approach

2013

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“…It is important to determine whether fluctuations in the T. pacificus catch are due to overfishing or to environmental changes or both. Recent research (Sakurai et al 2000) has shown that variations in oceanographic conditions, such as extension of possible spawning areas, influence both the distribution and abundance of T. pacificus. Kang et al (2002) examined the relationship between zooplankton biomass and squid catch in the Sea of Japan, and concluded that increased zooplankton biomass was the main reason for increased squid catches.…”

Section: Introductionmentioning

confidence: 99%

Use of nighttime visible images to detect Japanese common squid Todarodes pacificus fishing areas and potential migration routes in the Sea of Japan

Kiyofuji¹,

Saitoh²

2004

Mar. Ecol. Prog. Ser.

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This study used Defense Meteorological Satellite Program (DMSP)/Operational Linescan System (OLS) satellite images to classify and analyze the spatial and temporal variability of nighttime fishing vessel lights in the Sea of Japan. OLS images can detect the powerful lights used to attract squid. We examined DMSP/OLS nighttime visible images from 1994 to 1999. Fishing areas of the Japanese common squid Todarodes pacificus were defined as the bright areas created by 2-level slicing methods on DMSP/OLS images. T. pacificus fishing areas were mainly found along the east coast of Korea, between Cheju and Tsushima Islands, around the Yamato Rise, along the coast of Honshu, and in northern areas of the Sea of Japan. Using image classification and separability analysis, we divided the Sea of Japan into 7 areas based on different temporal variability in squid fishing area characteristics. The classification takes the potential northern and southern squid migration patterns into account. One of the potential northern migration patterns formed along Honshu Island to the north; another appeared along the east coast of Korea, northward through Yamato Rise. Southern migration patterns were almost the reverse of northern migration patterns. These 7 classified areas also correspond to the oceanographic characteristics of the Sea of Japan, i.e. a polar front at latitude 40°N, the inflow of the Tsushima Warm Current (TWC), and warm eddies. The use of remotelysensed data demonstrated in this study offers a powerful and innovative way in which to determine the migration and ecology of the Japanese common squid.

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“…DMSP/OLS영상은 야간조업어선의 불빛을 이용하여 어선의 분포 및 어획량에 근거한 어장 중심을 추정하는 방법으로, 회유 경로의 변화를 파악하는 것이 가능하다 (Kiyofuji et al, 2004;Choi et al, 2008). 그리고 성숙된 살오징어는 교미하여 알을 낳고 (Murata, 1990;Sakurai et al, 2003) 그 알이 부화하는 과정에 대한 연구 Sakurai, 2006)들이 이루어졌으며, 갓 태어난 유생들의 분포 (Goto, 2002;Kim, 2008)에 대한 분석은 산란장 추 정에도 이용되었다 (Sakurai et al, 2000;Rosa et al, 2011 (Kasahara and Ito, 1968;Osako and Murata, 1983;Mori and Nakamura, 2001;Kidokoro et al, 2010).…”

Section: 서 론unclassified

“…1. Reproductive hypothesis for the Japanese common squid, Todarodes pacificus, initially proposed by Sakurai et al (2000) and complemented by Sakurai (2006) (from Sakutai, 2006 Kim et al, 2011). 부화 후 15일 정도의 유생기간을 거치면 어린오징어로 변태 (Doi and Kawakami, 1978)하고, 부화 후 5개월이 지나면 외투장 14 cm 정도로 성장한 다 (Nakamura, 1985).…”

Section: 서 론unclassified

“…살오징어 어획량은 어구 및 어법의 발전 등 과 같은 인위적인 요소 (Zhang and Lee, 2004;Kim et al, 2010) 뿐만 아니라 기후체제전환에 따른 해양환경변화에 의해 영향을 받 기도 한다 (Sakurai et al, 2000;Rosa et al, 2011). 온난기에는 산 란장이 확장되어 유생의 양이 증가함에 따라 자원량도 증가하였 지만 한랭기에는 산란장의 규모가 축소되고 유생의 양이 감소하 면서 자원량 또한 줄어들었다 (Sakurai et al, 2000). 지금까지 추 정된 추계군의 산란장은 한국의 동해연안, 동해의 일본연안과 큐 슈남부까지이고, 동계군의 산란장은 큐슈부터 타이완까지이다.…”

Section: 살오징어 성어는 산란을 위해 남하 회유하는데 암컷의 성숙은unclassified

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Stock Identification of Todarodes pacificus in Northwest Pacific

Kim¹,

Moon

Yoon³

et al. 2012

The Sea

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Changes in inferred spawning areas of Todarodes pacificus(Cephalopoda: Ommastrephidae) due to changing environmental conditions

Cited by 189 publications

References 8 publications

The São Paulo shelf (SE Brazil) as a nursery ground for Doryteuthis plei (Blainville, 1823) (Cephalopoda, Loliginidae) paralarvae: a Lagrangian particle-tracking Individual-Based Model approach

The São Paulo shelf (SE Brazil) as a nursery ground for Doryteuthis plei (Blainville, 1823) (Cephalopoda, Loliginidae) paralarvae: a Lagrangian particle-tracking Individual-Based Model approach

Use of nighttime visible images to detect Japanese common squid Todarodes pacificus fishing areas and potential migration routes in the Sea of Japan

Stock Identification of Todarodes pacificus in Northwest Pacific

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