Abstract
Abstract The use of Bismarck Brown Y as a tool in mark-and-recapture studies was tested under laboratory conditions. Dyed blacktail shiners, Notropis venustus, were consumed at a greater rate than control fish by largemouth bass and bluegill. When both dyed and control prey were anesthetized no preference was exhibited by largemouth bass. Selection of dyed fish by largemouth bass continued under different lighting conditions. Behavioral response rather than color is considered to be the primary factor effecting differences in selection. At least 6 h were required for the dyed fish to recover from the observable effects of the dyeing process. The use of the stain Bismarck Brown Y may introduce bias in population studies.
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