Abstract
AbstractSoft plastic lures (SPLs) may comprise a significant amount of fishing gear pollution, yet little is known about their environmental impacts in aquatic systems or their ingestion by fish. We tested whether shape and material composition of ingested SPLs influenced subsequent prey consumption by Largemouth Bass Micropterus salmoides after SPL ingestion. We also quantified the occurrence of SPL ingestion by Largemouth Bass in reservoirs. Biodegradable and nonbiodegradable versions of shad, ribbon‐tail worm, and finesse worm SPLs were fed to Largemouth Bass, and consumption of natural prey was quantified 1 d and 1 week postingestion. Shape and material composition altered prey consumption by Largemouth Bass. Fish that ingested the shad SPL, the largest lure by volume, consumed the fewest number of prey 1 d postingestion. Ingestion of biodegradable SPLs resulted in lower prey consumption rates than ingestion of nonbiodegradable SPLs. Largemouth Bass typically expelled the SPL within 9 d of ingestion; all lures were either regurgitated or egested. Less than 1% of Largemouth Bass sampled in two Illinois reservoirs had SPLs in their stomachs. Our results suggest that discarded SPLs do not pose a significant long‐term threat to the health of individual Largemouth Bass. However, SPLs should still be discarded in a responsible manner.
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