Zoogeographical subdivision of the pelagic zone of the western Bering Sea based on nekton species ranges

Zoogeographical subdivision of the pelagic zone of the western Bering Sea based on nekton species... The subdivision of the western Bering Sea into zoogeographical regions for nekton fauna was carried out using data from 40 pelagic trawl surveys made by the Pacific Fisheries Research Center. The selected approach involves computer methods for plotting a map that describes the spatial distribution of the index of latitudinal zoning in the form of continuous fields. This index is a digital designation of verbally formulated types of latitudinal species areas. Computer mapping of the region was performed based on generalized data; intraday, seasonal, and interannual time aspects; and trawling depths. According to generalized data, almost the entire western part of the Bering Sea belongs to the high-boreal latitudinal subzone. A small area of the low-boreal subzone occurs only in the southeast of the open part of the sea. The average value of the latitudinal zoning index and its variation significantly decreased with increasing depth. From the upper epipelagic to the mesopelagic layer, the degree of subdivision decreased and the results of zoning of the mesopelagic layer were substantially different from all other zoning results. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

Zoogeographical subdivision of the pelagic zone of the western Bering Sea based on nekton species ranges

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Publisher
Springer US
Copyright
Copyright © 2013 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1134/S1063074013060035
Publisher site
See Article on Publisher Site

Abstract

The subdivision of the western Bering Sea into zoogeographical regions for nekton fauna was carried out using data from 40 pelagic trawl surveys made by the Pacific Fisheries Research Center. The selected approach involves computer methods for plotting a map that describes the spatial distribution of the index of latitudinal zoning in the form of continuous fields. This index is a digital designation of verbally formulated types of latitudinal species areas. Computer mapping of the region was performed based on generalized data; intraday, seasonal, and interannual time aspects; and trawling depths. According to generalized data, almost the entire western part of the Bering Sea belongs to the high-boreal latitudinal subzone. A small area of the low-boreal subzone occurs only in the southeast of the open part of the sea. The average value of the latitudinal zoning index and its variation significantly decreased with increasing depth. From the upper epipelagic to the mesopelagic layer, the degree of subdivision decreased and the results of zoning of the mesopelagic layer were substantially different from all other zoning results.

Journal

Russian Journal of Marine BiologySpringer Journals

Published: Jan 5, 2014

References

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