While large numbers of hatchery reared salmonids have been stocked into the Great Lakes, few of these introduced populations have become self-substaining. Many salmonid populations are contaminated by organochlorine chemicals, and some experience embryonic and fry mortality when reared in hatcheries...

The responses of shortfin eel (Anguilla australis) to discharges from two pulp and paper mills, municipal wastewater, and a geothermal power plant wastewater were examined. Eels were caged at 3 sites along the Tarawera River, North Island, New Zealand, to explore effects of a 3-wk exposure down a co...

The acute lethality of low dissolved oxygen (DO) was examined in laboratory studies using several New Zealand freshwater fish and two invertebrates at 15 degree C. The 48-h LC sub(50) value was used as the endpoint for acute DO sensitivity as, owing to rapid mortality, this was found to best approxi...

Twelve samples of minced liver from white sucker (Catostomus commersoni) were delivered to 14 laboratories in Canada and the United States for the analysis of hepatic ethoxyresorufin O-deethylase (EROD). Samples were collected from a site exposed to bleached kraft pulp mill effluent (BKME) and from ...

Temperature data loggers were deployed in several northern Alberta lakes, and the data collected were used to compute the cumulative number of days for which water temperature exceeded the 13.5 degrees C minimum temperature required for yellow perch (Perca flavescens) growth. Tow-net and seine sampl...

Over a 4-year period from 1990 to 1993, the H4IIE bioassay was used to measure 2,3,7,8-tetrachlorodibenzo-p-dioxin toxic equivalent concentrations (TECs) in the liver tissue of white sucker exposed to bleached kraft mill effluent. During two of the sampling periods, the H4IIE bioassay derived TECs (...