Spatial distributions of chum salmon and environments of their habitat in the Bering Sea during summer and autumn

However, few immature chum salmon are distributed over the eastern Bering Sea shelf. The environmental limits of their distributions in summer are not well known. To understand the effects of environmental factors on distributions of chum salmon in the Bering Sea, we investigated the characteristics...

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Bibliographic Details
Main Authors: Tomonori Azumaya, Toru Nagasawa, Orio Yamamura, Morihiko Kawana, Gennady V. Khen, Olga Temnykh
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 2006
Subjects:
Numerical ocean model
chum salmon
summer
distribution
Bering Sea Chum salmon are widely distributed in the Bering Sea basin during summer
Bering Sea
Mellor
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.541.3523
http://www.npafc.org/new/publications/Technical Report/TR6/page 82-83(Azumaya).pdf
Description
Summary:However, few immature chum salmon are distributed over the eastern Bering Sea shelf. The environmental limits of their distributions in summer are not well known. To understand the effects of environmental factors on distributions of chum salmon in the Bering Sea, we investigated the characteristics of water mass and distributions of chum salmon by using data from the Bering-Aleutian Salmon International Survey (BASIS) and on the seasonal change of sea conditions in the Bering Sea in a numerical ocean model. Data on chum salmon and hydrographic data in summer were collected during BASIS fieldwork aboard the RV Kaiyo maru and RV TINRO in 2003. The initial temperature and salinity fields of the numerical ocean model were obtained from the Levitus climatology (Levitus 1984). The numerical model used in this study was the Princeton Ocean Model (POM) described by Blumberg and Mellor (1987). The POM model is a three dimensional, primitive-equation model. The model resolution was a 1/6 ° X 1/6 ° spherical grid, which was a constant 18.5 km in the meridional direction and varied from 14.2 km at the southern boundary to 6.3 km at the northern boundary in the zonal direction. The model topography was calculated by averaging 5-min horizontal resolution the ETOPO5 data around each model point. The wind stress was horizontally interpolated from the climatology data of Hellerman and Rosenstin (1983). The southern and northern boundaries and the eastern boundary at 150 ° W, except for the

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