An East-West Comparison of the Transition Zone Coastal Pelagic Nekton of the North Pacific Ocean |
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| Authors: | Richard D Brodeur Joseph P Fisher Yasuhiro Ueno Kazuya Nagasawa William G Pearcy |
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| Institution: | (1) Northwest Fisheries Science Center, NMFS, Newport, OR, 97365, U.S.A;(2) College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR, 97331, U.S.A;(3) Tohoku National Fisheries Research Institute, FRA, Hachinohe 031-0841, Japan;(4) National Research Institute of Aquaculture, FRA, Nikko 321-1661, Japan |
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| Abstract: | During the 1980s and 1990s, scientific research cruises were conducted in both the eastern and western boundary regions of
the North Pacific Ocean. The main purpose of these cruises was to examine the abundance and distribution patterns of juvenile
salmon in coastal waters. These studies created one of the most extensive databases ever collected on the species composition
of coastal Transition Zone epipelagic nekton in the North Pacific Ocean. Catch data from two purse seine and two surface trawl
surveys (one each from off northern Japan and eastern Russia and off the West Coast of the U.S.) were examined using multivariate
techniques to analyze the community structure of nektonic cephalopods, elasmobranchs, and teleosts in the coastal zone during
the summer and autumn months. Juvenile salmonids are generally among the most common species caught, but in terms of overall
abundance, other potential competitors with juvenile salmon, such as small squids and clupeoid fishes predominated the catches.
Species diversity and dominance varied among areas and gear types. Distinct assemblages were found in each area, but the two
regions had closely related species occupying similar ecological positions in each habitat.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | Pelagic nekton assemblages habitat coastal Transition Zone North Pacific Ocean |
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