Abstract

The growth and feeding behaviour of individually held underyearling largemouth bass ( Micropterus salmoides) exposed to 50 μg/l pentachlorophenol (PCP) was monitored over a 7-day period which followed a 7-day acclimation period to the experimental conditions. Exposure to PCP reduced food conversion efficiency (g of growth/g of food) by 30% as well as the amount of food consumed. Feeding efficiency (capture to strike ratio) was also lowered by PCP exposure. Our experiment not only documents growth related responses to a toxic substance but demonstrates that the effects of a toxic substance can be readily determined with a carefully executed short term experiment.

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