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A recent study demonstrated that electrosensory receptors in paddlefish rostrum can detect weak electrical fieldsand suggested that paddlefish use their rostrum as an electrosensory "antenna" to detect zooplankton for feeding.
Paddlefish populations have been negatively affected by overharvest, sedimentation, and river modifications. Dams in particular have had an adverse affect on paddlefish because they alter traditional habitats and can impact spawning migrations.
Concern for paddlefish stocks has risen because the collapse of most sturgeon stocks in the world has increased demand for paddlefish eggs for the lucrative caviar trade.