Effects of 4-nonylphenol and formulations of five pesticides : cypermethrin, deltamethrin, glyphosate, imidacloprid and mancozeb on growth of Atlantic salmon (Salmo salar L.) during parr-smolt transformation...: Fs97-6/3265E-PDF

"This study has shown that short term, freshwater exposure of Atlantic salmon (Salmo salar L.) to some pesticide formulations during parr-smolt transformation (PST) caused significant reduction of specific growth rate of fish compared to the control fish over the course of a critical seawater growth period. Effects of 4-nonylphenol and formulations of five pesticides: cypermethrin, deltamethrin, glyphosate, imidacloprid and mancozeb, were tested. All the chemicals tested affected fish growth in seawater at either the July or September sample times. Other studies link poor growth near PST to reduced survival at sea and lower returns of adult salmon to their native streams. These results suggest that wild Atlantic salmon smolts may be affected by pesticides in rivers supporting sea-run salmon stocks. The consequences of reduced growth may be failure to survive or thrive at sea"--Abstract, p. v.

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