Emerging patterns of species richness, diversity, population density, and distribution in the skates (Rajidae) of Alaska

Stevenson, Duane E. and Orr, James W. and Hoff, Gerald R. and McEachran, John D. (2008) Emerging patterns of species richness, diversity, population density, and distribution in the skates (Rajidae) of Alaska. Fishery Bulletin, 106(1), pp. 24-39.

[img]
Preview
PDF (The document's language is English .) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (2923Kb) | Preview
Official URL: http://fishbull.noaa.gov/1061/stevenson.pdf

Abstract

Six years of bottom-trawl survey data, including over 6000 trawls covering over 200 km2 of bottom area throughout Alaska’s subarctic marine waters, were analyzed for patterns in species richness, diversity, density, and distribution of skates. The Bering Sea continental shelf and slope, Aleutian Islands, and Gulf of Alaska regions were stratified by geographic subregion and depth. Species richness and relative density of skates increased with depth to the shelf break in all regions. The Bering Sea shelf was dominated by the Alaska skate (Bathyraja parmifera), but species richness and diversity were low. On the Bering Sea slope, richness and diversity were higher in the shallow stratum, and relative density appeared higher in subregions dominated by canyons. In the Aleutian Islands and Gulf of Alaska, species richness and relative density were generally highest in the deepest depth strata. The data and distribution maps presented here are based on species-level data collected throughout the marine waters of Alaska, and this article represents the most comprehensive summary of the skate fauna of the region published to date.

Item Type: Article
Title: Emerging patterns of species richness, diversity, population density, and distribution in the skates (Rajidae) of Alaska
Personal Creator/Author:
CreatorsEmail
Stevenson, Duane E.
Orr, James W.
Hoff, Gerald R.
McEachran, John D.
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 106
Number: 1
Page Range: pp. 24-39
Date: 2008
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8854
Depositing User: Patti M. Marraro
Date Deposited: 14 Jun 2012 17:13
Last Modified: 14 Jun 2012 17:13
URI: http://aquaticcommons.org/id/eprint/8854

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...