Life history of the neon flying squid: effect of the oceanographic regime in the North Pacific Ocean

Ichii, Taro; Mahapatra, Kedarnath; Sakai, Mitsuo; Okada, Yoshihiro

doi:10.3354/meps07873

Cited by 78 publications

(50 citation statements)

References 22 publications

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“…Therefore, large-size classes (>550 mm ML) may be under-represented in the present data. The size difference between the sexes in our dataset is consistent with that reported in previous studies (Ichii et al 2009, Yatsu et al 1998. Fig.…”

Section: Structure Of the Reproductive Organssupporting

confidence: 82%

“…This location is characterized by enhanced productivity in winter because of its proximity to the transition zone chlorophyll front (TZCF). In comparison, the spawning and nursery ground of the winter-spring cohort occurs within the subtropical domain (STD), which is less productive (Ichii et al 2009). The STFZ is defined by a salinity range of 34.6 to 35.2 at the sea surface, generally occurring at ~29 to 34°N latitude, with the STD occurring to the south of the STFZ (Ichii et al 2009, Roden 1991.…”

Section: Introductionmentioning

confidence: 99%

“…O. bartramii are considered to be paralarvae (i.e. young cephalopods in the planktonic stages) from hatching to one month of age (Bigelow and Landgraph 1993), juveniles and subadults from one month of age until they reach a mantle length (ML) of ~25 cm (Ichii et al 2009), and adults above 25 cm ML.…”

Section: Introductionmentioning

confidence: 99%

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Spawning pattern of the neon flying squid <em>Ommastrephes bartramii</em> (Cephalopoda: Oegopsida) around the Hawaiian Islands

Vijai¹,

Sakai²,

Kamei³

et al. 2014

Sci. Mar.

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Summary:The neon flying squid, Ommastrephes bartramii, is an oceanic squid species that is widely distributed in the North Pacific, with the winter-spring cohort spawning around the Hawaiian Islands. Here, we investigated the spawning characteristics of O. bartramii by analyzing various reproductive parameters of individuals (622 males, 108 females) collected in this region. Female spawning status was determined from the somatic indices and histological characteristics of the ovaries. At all developmental stages, the ovaries of spawned females contained oocytes, and oviduct fullness was not correlated with body size. Thus, because the eggs mature asynchronously, with multiple filling and evacuation events, this species is considered an intermittent spawner. Mature males with developed accessory glands were also present within the distribution range of healthy spawned females, indicating that mating occurs between spawning events. Our data indicate that the first spawning event occurs at a mantle length of ~520-540 mm for Hawaiian O. bartramii. Subsequently, the squid forage and grow, and refill the oviducts, before the second spawning event occurs.Keywords: North Pacific; squid; Ommastrephes bartramii; reproductive strategy; spawning pattern. Patrón de desove de la pota saltadora Ommastrephes bartramii (Cephalopoda: Oegopsida) alrededor de las islas de HawaiResumen: La pota saltadora, Ommastrephes bartramii, es una especie de calamar oceánico que se encuentra ampliamente distribuido en el Pacífico Norte, con la cohorte de desove de invierno-primavera situada alrededor de las islas Hawai. El presente estudio investiga las características de desove de O. bartramii mediante el análisis de diversos parámetros reproductivos de ejemplares (622 machos, 108 hembras) recolectados en esa región. El nivel de desove de las hembras se determinó a partir de índices somáticos y características histológicas de sus ovarios. En todos los estadios de desarrollo, los ovarios de las hembras desovantes contenían oocitos, en tanto que el grado de llenado de los oviductos no se correlacionó con el tamaño del cuerpo. Así, debido a que los oocitos maduran de forma asincrónica, con múltiples eventos de llenado y liberación, se considera a esta especie como desovante intermitente. Se recolectaron machos maduros con glándulas accesorias desarrolladas en el rango de distribución de las hembras desovantes, indicando que las cópulas se producen entre estos eventos de desove. Nuestros datos indican que en O. bartramii de la zona de Hawaii el desove inicial se produce a ~520-540 mm de longitud del manto. Posteriormente, el calamar se alimenta y crece, volviendo a rellenar sus oviductos antes de que aparezca el segundo evento de desove.

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Section: Structure Of the Reproductive Organssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spawning pattern of the neon flying squid <em>Ommastrephes bartramii</em> (Cephalopoda: Oegopsida) around the Hawaiian Islands

Vijai¹,

Sakai²,

Kamei³

et al. 2014

Sci. Mar.

View full text Add to dashboard Cite

show abstract

“…Additionally, birds appear to use the NPTZ, which spans the Subarctic and Subtropical Frontal Zones, and is an important foraging and migration habitat for many species due to aggregations of mesopelagic prey (Robinson et al 2012). For example, DVM squid seasonally migrate from spawning areas in the subtropics to the Subarctic Frontal Zone to feed on myctophid fishes (Watanabe et al 2004, Ichii et al 2009). …”

Section: Year-round Distribution and Habitat Preferencesmentioning

confidence: 99%

Escaping the oligotrophic gyre? The year-round movements, foraging behaviour and habitat preferences of Murphy’s petrels

Clay¹,

Phillips²,

Manica³

et al. 2017

Mar. Ecol. Prog. Ser.

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“…The spatial-temporal interactions of both hierarchical and non-hierarchical models were identified as not significant in influencing CPUE as they were driven by environmental factors which were already included. For example, special oceanographic zones in the North Pacific such as transition zones, chlorophyll fronts (TZCF) and optimum-SST front zones for neon flying squid, which are closely related to the life history of neon flying squid, have a significant seasonal northsouth movement (Ichii et al, 2009). We also added the year effect (non-significant) for re-running the GLBM (Maunder and Punt, 2004), but found that it was hard to achieve convergence if we included the year effect.…”

Section: Discussionmentioning

confidence: 99%

Generalized linear Bayesian models for standardizing CPUE: an application to a squid-jigging fishery in the northwest Pacific Ocean

Cao¹,

Chen²,

Chen³

et al. 2011

Sci. Mar.

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SUMMARY: Generalized linear Bayesian (GLBM) non-hierarchical and hierarchical models were developed for standardization of catch per unit effort (CPUE). The GLBM containing the covariates of month, latitude, sea surface temperature (SST), sea surface salinity (SSS) and sea level height (SLH) had the best fit for the Chinese squid-jigging fishery of Ommastrephes bartramii in the northwest Pacific Ocean based on deviance information criteria. This best-fitting model tends to be more ecologically sound than other CPUE standardization models, such as generalized linear models and generalized additive models. GLBM was also used to deal with the problems of estimating stock abundance index (i.e. standardized CPUE) resulting from increased spatial heterogeneity of spatial dynamics of fishing efforts in the squid fishery by predicting the standardized CPUE for unfished areas. The standardized CPUE based on data including predicted CPUE of unfished areas was lower than the derived CPUE based on data with observed CPUE alone, in particular during the fishing peak of August to October. This study indicates that it is more appropriate to use the standardized CPUE derived from data including both predicted CPUE of unfished areas and observed CPUE of fished area as a stock abundance index. We suggest that the proposed method be used in CPUE standardization to account for impacts of large spatial heterogeneity of fishing efforts in fisheries.Keywords: generalized linear Bayesian models, CPUE standardization, Ommastrephes bartramii, Chinese squid-jigging fishery, northwest Pacific Ocean. RESUMEN: Modelos lineales generalizados bayesianos para la estandardización de CPUE: aplicación a la pesquería de calamar mediante jigging en el Pacífico noroccidental. -Se desarrollan modelos lineales generalizados bayesianos (GLBM) jerárquicos y no-jerárquicos para la estandardización de captura por unidad de esfuerzo (CPUE). El modelo GLBM seleccionado para la pesquería del calamar Ommastrephes bartramii mediante jigging en el Pacífico noroccidental incorporó las variables explicativas mes, latitud, temperatura superficial del mar (SST), salinidad superficial del mar (SSS) y altura del nivel del mar (SLH). La selección del modelo se basó en el Criterio de Información de la Desviación (DIC). El modelo que mejor se ajustó a los datos tiene más sentido ecológico comparado con modelos de estandardización de CPUE basado en modelos lineales generalizados y modelos aditivos generalizados. Se utilizó también el GLBM para tratar el problema de la estimación de un índice de abundancia del stock (es decir, CPUE estandardizada) frente a la elevada heterogeneidad espacial en la dinámica del esfuerzo en la pesquería del calamar mediante la predicción de la CPUE estandardizada en áreas no pescadas. La CPUE estandardizada en base a los datos que incluyen la CPUE predicha en áreas no pescadas fue inferior a la CPUE derivada en base solamente a la CPUE observada, especialmente durante el pico de pesca de Agosto a Octubre. Este estudio muestra que es más aprop...

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Life history of the neon flying squid: effect of the oceanographic regime in the North Pacific Ocean

Cited by 78 publications

References 22 publications

Spawning pattern of the neon flying squid <em>Ommastrephes bartramii</em> (Cephalopoda: Oegopsida) around the Hawaiian Islands

Spawning pattern of the neon flying squid <em>Ommastrephes bartramii</em> (Cephalopoda: Oegopsida) around the Hawaiian Islands

Escaping the oligotrophic gyre? The year-round movements, foraging behaviour and habitat preferences of Murphy’s petrels

Generalized linear Bayesian models for standardizing CPUE: an application to a squid-jigging fishery in the northwest Pacific Ocean

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