Wiener, J. G., and Hanneman, W. R., 1982, Growth and condition of bluegills in
Wisconsin lakes: effects of population density and lake pH: Transactions of the
American Fisheries Society, v. 111, no. 6, p. 761-767.

Abstract:

Growth and condition of bluegills epomis macrochirusfrom five acidic lakes (pH
5.1-6.0) and six  circumneutral lakes (pH 6.7-7.5) in northern Wisconsin were
compared. Although mean condition factors and  mean back-calculated total
lengths at ages 1 to 4 varied significantly among lakes, the differences were not 
related to lake pH. Rather, the ranks of mean condition factors and back-calculated
lengths at ages 2, 3, and 4  were negatively correlated with relative density of
bluegills among the lakes. Because of the dominating effect of  density, growth
rates and condition factors are not useful as indicators of chronic, pH-related stress
on bluegill  populations.

Keywords:

population-dynamics, environmental-effects, acidification, Lepomis-macrochirus,
USA, Wisconsin