Feeding ecology of Brook Silverside, Golden Shiner, and subyearling pumpkinseed in a Lake Ontario embayment

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Abstract

Fish feeding ecology has been shown to vary over a 24-h period in terms of the prey consumed and feeding intensity. Consequently, in order to best determine the interspecific feeding associations within a fish community, examination of the diet at multiple times over a 24-h period is often necessary. We examined the diel feeding ecology of three fish species that were numerically dominant in a Lake Ontario embayment during summer. The diet of each of the three species, young-of-year Pumpkinseed Lepomis gibbosus, Golden Shiner Notemigonus crysoleucas, and Brook Silverside Labidesthes sicculus, was distinct with no significant overlap in diet composition occurring within any of the 4-h time intervals. The diet composition of each species suggested that Brook Silverside were feeding at the surface (terrestrial invertebrates and aquatic surface dwelling hemipterans), whereas young-of-year Pumpkinseed (amphipods) and Golden Shiner (tipulids) were feeding on different benthic prey. Differences in feeding periodicity were most pronounced for young-of-year Pumpkinseed. Our findings provide valuable insights on interspecific feeding associations among these three fish species during summer in a Lake Ontario embayment.

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Johnson, J. H., Chalupnicki, M. A., Abbett, R., Diaz, A. R., & Nack, C. C. (2017, June 1). Feeding ecology of Brook Silverside, Golden Shiner, and subyearling pumpkinseed in a Lake Ontario embayment. Journal of Fish and Wildlife Management. Allen Press. https://doi.org/10.3996/092016-JFWM-075

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