An Evaluation Of Recovery Data From Artificially Seeded Lead Shot On Catahoula Lake, Lasalle Parish, Louisiana

Paired plots, seeded with four sizes of lead shot, were established at three locations in an effort to better understand the lead shot problem associated with waterfowl using Catahoula Lake. Half of the plots were treated with a known number of shot in the fall of 1965 and the remainder were similarly treated in the spring of 1966. Soil samples were to be taken in October every two years. In 1967 soil samples were taken and the shot collected were separated according to size and counted. Analysis of data from these samples indicated very little difference in the number of shot recovered when location and plots were considered separately. However, an interaction was apparently responsible for the significant difference detected in the number of pellets recovered. This was probably due to the degree of hog rooting found in the outside plots. The size of shot, or the effect of livestock, apparently had no influence on the depth at which shot were recovered. The largest amount of shot was found between the two and six inch depth levels, with the largest portion being found in the two to four inch level. There is some indication that the depth of the hardpan probably determined shot depth more than any other factor during this sampling period.

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