Here are two references that might be considered. The first link is to a recent report on herring abundance in Albemarle Sound in North Carolina:
http://www.ncseagrant.org/images/stories/ncsg_pdf/documents/research/07FEG09%20final%20report.pdf
This link is to a book chapter about the status of blueback herring stocks:
http://www.lib.ncsu.edu/resolver/1840.2/559
Comment from Joseph Hightower
This is comment on Proposed Rule
Listing Endangered and Threatened Wildlife and Plants: 90-Day Finding on Petition to List Alewife and Blueback Herring
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