Initial Effects of Tertiary Wastewater Treatment on Growth and Food Eaten by Yellow Perch Perca flavescens (Mitchill) in Shagawa Lake, Minnesota

Abstract

Abundance, growth and food of yellow perch (Perca flavescens) were studied from 1974-1976 to evaluate the effects of a tertiary wastewater treatment plant which began operation in 1973 on eutrophic Shagawa Lake, Ely, Minnesota. Trawl, seines and gill nets were used in sampling. No conclusive results were obtained to relate tertiary wastewater treatment to changes observed in abundance, growth and food of yellow perch in Shagawa Lake.