Gizzard shad grow significantly bigger than one pound. I saw a photo of one online recently that looked like it was at least seventeen inches and three pounds. Here's an article that says they grow up to 18", and that stripers were originally stocked into inland reservoirs to control the gizzard shad the LMB couldn't eat:
http://www.insideline.net/1999/price-0910-99.htmlI would be wary of them. But the flip side is, they have been used successfully by some prominent Southern pond management companies to grow very large LMB.
