Effects of rostrum injuries on body condition and dam passage of Paddlefish.

This article investigates the occurrence and effects of rostrum injuries on Paddlefish (Polyodon spathula) in the Alabama River, focusing on how such damage influences body condition, gonad development, and dam passage at Claiborne Lock and Dam (CLD). The study found that rostrum damage was significantly more prevalent in Paddlefish from the lower Alabama River and Claiborne Lake sections compared to upstream reservoirs, with males exhibiting more damage and reduced body condition than females; however, gonadosomatic index (GSI) was unaffected by rostrum condition in both sexes. Importantly, rostrum damage did not significantly influence the ability of Paddlefish to pass upstream at CLD, suggesting minimal impact on migration and spawning movements. These findings indicate that while rostrum injuries vary spatially and by sex, their overall effects on Paddlefish condition and dam passage appear limited within the parameters measured.