Comparing scale and otolith age estimates to understand the potential bias of long-term American shad age data in the Penobscot River

Camille Wilson
American shad (Alosa sapidissima) are indigenous to the Atlantic Ocean, but despite their long history in this range, they currently represent only a fraction of their historical abundance. Since they are an ecologically and commercially important species that has experienced an extensive decline, it is important to understand the demographics of the populations to best manage stocks and promote sustainable harvest. One key aspect of demography is population age structure. Fish age can be estimated...
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