Hoff, Gerald R. (2006) Biodiversity as an index of regime shift in the eastern Bering Sea. Fishery Bulletin, 104(2), pp. 226-237.
|PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader |
Download (1298Kb) | Preview
Data collected from an annual groundf ish survey of the eastern Bering Sea shelf from 1975 to 2002 were used to estimate biomass and biodiversity indexes for two fish guilds: f latfish and roundfish. Biomass estimates indicated that several species of f latfish (particularly rock sole, arrowtooth flounder, and f lathead sole), several large sculpins (Myoxocephalus spp.), bigmouth (Hemitripterus bolini), and skates (Bathyraja spp.) had increased. Declining species included several f latfish species and many smaller roundfish species of sculpins, eelpouts (Lycodes spp.), and sablefish (Anoplopoma fimbria). Biodiversity indexes were calculated by using biomass estimates for both guilds from 1975 through 2002 within three physical domains on the eastern Bering Sea shelf. Biodiversity trends were found to be generally declining within the roundfish guild and generally increasing within the f latfish guild and varied between inner, middle, and outer shelf domains. The trends in biodiversity indexes from this study correlated strongly with the regime shift reported for the late 1970s and 1980s.
|Title:||Biodiversity as an index of regime shift in the eastern Bering Sea|
|Journal or Publication Title:||Fishery Bulletin|
|Page Range:||pp. 226-237|
|Issuing Agency:||United States National Marine Fisheries Service|
|Depositing User:||Patti M. Marraro|
|Date Deposited:||03 Aug 2012 20:30|
|Last Modified:||03 Aug 2012 20:30|
Actions (login required)