Subtropical migrants in the southwestern part of the Bering Sea

Glebov, I. I.; Savinykh, V. F.; Baitalyuk, A. A.

doi:10.1134/s0032945210060020

Cited by 6 publications

(2 citation statements)

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“…Long-term changes in the spatial distribution of S. suckleyi in the North Pacific had not been examined prior to our study. Our analysis indicates that during the recent decade the range of this dogfish has expanded greatly to the north on both sides of the Bering Sea, up to Navarin Cape and even to the Gulf of Anadyr (Glebov et al 2010). Our finding agrees with that of Wright and Hulbert (2000) regarding the increase in the number of this dogfish in the Gulf of Alaska since the late 1990s, which is probably a result of the well-documented climate regime shift in the North Pacific over the past century (McFarlane et al 2000, Benson and Trites 2002, Schwing et al 2002, King 2005.…”

Section: Spatial Distributionmentioning

confidence: 98%

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New data on the distribution and size composition of the North Pacific spiny dogfish <i>Squalus suckleyi</i> (Girard, 1854)

Орлов¹,

Savinykh²,

Kulish³

et al. 2011

Sci. Mar.

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SUMMARY:The results of long-term research on the spatial and vertical distribution of the North Pacific spiny dogfish Squalus suckleyi in the North Pacific Ocean and its size composition are presented. In total, data from 7059 catches of this species were analyzed (3178 with associated capture depth). The description of size composition is based on measurements of 413 specimens caught by driftnets, 328 by pelagic trawls and 722 by bottom trawls. This species was found to be most widely distributed in the North Pacific in the summer and autumn months during feeding migrations. Seasonal and long-term changes in the spatial distribution were observed. A wide distribution of S. suckleyi in the Bering Sea was recorded after the year 2000, which is likely associated with recent climate change. Occurrence of the species in the water column and near the bottom differed considerably. In the water column, the maximum number of captures was observed within the upper 25 m layer (about 90%). Near the bottom, this species was most abundant at depths less than 50 m (over 45%) and within a depth range of 101-200 m (about 50%). The catch of S. suckleyi during the daytime was considerably larger than in the night, possibly due to vertical diurnal migrations. This species was found at water temperatures ranging from 0 to 12.7°C, and maximum catches were observed at temperatures over 8°C. Size compositions of bottom and pelagic trawl catches were similar (mean length 69.1 and 68.6 cm respectively) while driftnet catches were composed of larger specimens (mean length 75.3 cm).Keywords: North Pacific spiny dogfish, Squalus suckleyi, distribution, size composition, North Pacific Ocean.RESUMEN: Nuevos datos sobre la distribución y la composición de tallas de la mielga del Pacífico norte SqualuS Suckleyi (Girard, 1854). -Se presentan los resultados de un estudio a largo plazo sobre la distribución espacial y vertical y la composición de tallas de la mielga del Pacífico norte, Squalus suckleyi. Se analizó la captura de 7059 ejemplares de esta especie (de los que 3178 disponían de datos de profundidad de captura). La composición de tallas se basó en las medidas de 413 ejemplares capturados mediante redes de deriva, 328 por arrastres pelágicos y 722 por arrastres de fondo. La especie se distribuye más ampliamente en el Pacífico norte durante los meses de verano y otoño, asociada a migraciones alimentarias. Se observaron cambios estacionales y a largo plazo en la distribución espacial. En el Mar de Bering se registró una amplia distribución de S. suckleyi después de 2000, probablemente asociada a cambios climáticos recientes. La presencia de la especie en la columna de agua y cerca del fondo difiere notablemente. En la columna, el número máximo de capturas (cerca del 90%) se observó en los primeros 25 m de profundidad. Cerca del fondo, la especie fue más abundante a profundidades menores de 50 m (más del 45%) y en el rango 101-200 m (cerca del 50%). Las capturas de S. suckleyi durante el día fueron considerablemente mayores que durante la n...

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Section: Spatial Distributionmentioning

confidence: 98%

“…The southern edge of its range extends to the northern part of the East China Sea, the Hawaiian Islands, and the southern tip of Baja California (Mecklenburg et al 2002, Glebov et al 2010. It is also known that this shark inhabits mostly coastal areas but occasionally occurs far from shore , Melnikov 1997.…”

Section: Introductionmentioning

confidence: 99%