. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Figure 24. Catch (top) and 1990 dollar value of catch (bottom) for the dominant fish species exploited by commercial fishermen in the Kaskaskia River from 1974 through 1991 (data were not obtained from this system in 1977). Since 1981, buffalo has been the predominant fish group caught in the Kaskaskia River, which has yielded as much as 160,000 pounds of this species. As in the Illinois River, catc
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Figure 24. Catch (top) and 1990 dollar value of catch (bottom) for the dominant fish species exploited by commercial fishermen in the Kaskaskia River from 1974 through 1991 (data were not obtained from this system in 1977). Since 1981, buffalo has been the predominant fish group caught in the Kaskaskia River, which has yielded as much as 160,000 pounds of this species. As in the Illinois River, catches of carp have diminished while catches of catfish have remained relatively constant or shown upward trends. Other species including drum, paddlefish, etc., contribute relatively little to this fishery. Buffalo generated the most value in the fishery from 1983 to 1990, but value of catfish to the fishery lias remained relatively constant while buffalo has been highly variable. Value of carp to the fishery appears to be decreasing steadily since 1983. Other fish species combined yield less than $3,000 / year to the fishery. Figure 25. Catch (top) and 1990 dollar value of catch (bottom) for the dominant fish species exploited by commercial fishermen in the Wabash Riverfront 1971 through 1991. The Wabash River fishery is a much more mixed fishery than that of the Kaskaskia or Illinois rivers. Although in some years more buffalo has been caught, the predominant fish caught in the Wabash has been catfish, and catches of this group have been increasing relatively steadily since 1979, achieving a high of almost 56,000 pounds in 1990. In contrast, carp catches have shown a downward trend. Catches of drum, paddlefish, and sturgeon remained small and relatively constant. Catch of other species (predominantly white carp and suckers) has exhibited a slight downward trend. Catfish clearly contribute the highest value to the Wabash fishery, generating over $41,000 in some years. The contri
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Keywords: ., bookcentury1900, booksubjecte, booksubjectecology, booksubjectman
