Development of a short-term in situ caging methodology to assess long-term effects of industrial and municipal discharges on salmon smolts.

Trial experiments to develop an in situ method for determining effects of short-term exposure to contaminants on salmon during the sensitive smolt stage were carried out. Wild Atlantic salmon (Salmo salar) smolts were caged at various estuarine locations in northeast New Brunswick, Canada at different levels of anthropogenic impact in 2000 and 2001. Survival, growth (weight and K), and feeding (delta(13)C and delta(15)N) parameters were measured following summer grow-out at a hatchery.

Mouthpart deformities and community composition of Chironomidae (Diptera) larvae downstream of metal mines in New Brunswick, Canada.

The effect of metal enrichment on chironomid communities was examined in streams receiving mine drainage from metal mining operations in New Brunswick, Canada. At five sites receiving mine drainage, metal concentrations were significantly (p < 0.05) elevated in water (Zn), periphyton (Cd, Co, Cu, and Zn), and chironomid tissue (Cu, Cd, and Zn) relative to five paired reference locations.

Accumulation and depuration of 2,3,7,8-tetrachlorodibenzofuran and octachlorodibenzo-p-dioxin by caddisfly larvae (Hydropsyche bidens (ross)) in miniature laboratory streams.

The uptake and depuration kinetics of [ H]-2,3,7,8-tetrachlorodibenzofuran ([ H]TCDF) and [ C]-1,2,3,4,6,7,8,9-octachlorodibenzo-p-dioxin ([ C]OCDD) were studied in the filter-feeding caddisfly Hydropsyche bidens (Ross), using artificial laboratory streams. Dietary and water-borne routes of uptake were compared. Biomagnification factors (BMFs) ranged from 0.