Longnose suckers

Kloeppersams, P.J., Swanson, S.M., and Marchant, T. et al. (1994). Exposure of fish to biologically treated bleached-kraft effluent 1. Biochemical, physiological and pathological assessment of rocky mountain whitefish (Prosopium williamsoni) and longnose sucker (Catostomus catostomus). Environmental Toxicology and Chemistry 13, 1469-1482. 

LC50 (96-h) for Pteronarcella badia 610 pg/L, Atlantic salmon 134 pg/L, bluegill sunfish 460 pg/L, brown trout 138 pg/L, brook trout >800 pg/L, channel catfish 440 pg/L, lake trout 480 pg/L, longnose sucker 330 pg/L, rainbow trout 135 pg/L, white sucker 435 pg/L, yellow perch 240 pg/L (Johnson and Finley, 1980). 

The elevated toxaphene levels in Lake Superior have social and economic impacts as well. The 2003 Guide to Eating Sport Fish published by the Ontario Ministry of Environment and Energy [158] indicates fish consumption advisories for Lake Superior lake trout due to toxaphene levels. As a result of the high toxaphene levels, the Ontario Ministry of Natural Resources has restricted sale with Ontario (but not the export) of large lake trout harvested from Lake Superior as of 1995. An assessment of toxaphene levels in Lake Superior fish fillets by Health Canada concluded that consumption of lake trout, salmon, longnose sucker and whitefish muscle from northwestern areas of the lake should be limited to one or two meals per month (55-135 g/week) based on a provisional tolerable daily intake of 0.2 pg/g body wt/day [159]. 

Two sentinel species were caught in the reference and exposure zones in sufficient numbers (at least 12 fish) for statistical interpretation. The data for the white sucker, Catastomus comersoni and longnose sucker, Catastomus catastomus, are listed in Table 7. All endpoints (Beak International, 2000) and comparisons of exposure and reference area data involved appropriate statistical methods. Any significant difference or significant interaction in any endpoint was considered potentially mill-related. 

Table 7. Fish survey summary statistics analyses1 for white and longnose sucker, Kimberly-Clark...

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