| toxaphene congeners in the canadian great lakes basin: temporal and spatial food web dynamics. | samples of a top predator fish species, lake trout (salvelinus namaycush) and predominant forage species including smelt (osmerus mordax), alewife (alosa pseudoharengus), slimy sculpin (cottus cognatus), deepwater sculpin (myoxocephalus quadricornis) and lake herring (coregonus artedii) were, collected from throughout 4 of the 5 great lakes (superior, huron, erie and ontario) (fig. 1). lake trout were also collected from three isolated lake systems (lakes nipigon, simcoe and opeongo), all locate ... | 2000 | 10739065 |