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Abstract

Mound Pound is a 56-ha oxbow lake of the Arkansas River. The lake has been disconnected from the Arkansas River main channel for over 2,500 years. The lake lies adjacent to the Toltec Mounds Archeological State Park, which contains the Toltec Mound Complex (3LN42). In October 2012, a multiple-gear sampling of the fish assemblage in Mound Pond was conducted using boat-mounted electrofishing, mini-fyke nets, and experimental gill nets. Across all gears, 501 fish specimens were collected and identified to species. Percent Similarity Index (PSI) and Shannon-Weiner Diversity Index (H') values were calculated using data from this survey and a previous survey conducted in 2006. Mound Pond had a fish species richness of 11 in 2012 compared to 12 in 2006. PSI values indicated the 2006 and 2012 assemblages were 58% similar; H' values of 1.282 in 2012 and 1.465 in 2006 did not differ significantly (p > 0.05). Genus-level Jaccard coefficients (J) were calculated for pairwise comparisons of ichthyofaunal remains recovered from Toltec Mounds D and S, and the two modner fish surveys. Fish assemblages depicted from remains recovered at the two mounds were highly similar (J = 0.769), whereas the two modern surveys were only moderately similar (J = 0.545). Modern and ancient assemblages were generally dissimilar (J = 0.333 - 0.461). This observation of 3LN42 were likely not acquired from Mound Pond in spite of its close proximity.

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