Behavioral responses of juvenile coho salmon (Oncorhynchus kisutch) exposed to pulp mill effluents

Coho salmon (Oncorhynchus kisutch) smolts from the Chehalis River may encounter large discharges (>1.7x108 L/d) of pulp mill effluent during their downstream migration through Grays Harbor, Washington. Smolt survival is believed to be reduced by the impaired water quality resulting from effluent releases (Seiler 1989), and it is possible that the orientation behavior of young salmon could be disrupted by exposure to sublethal concentrations of these effluents (Sutterlin 1974).