Consumption of Food by the Resident Population of Pike, Esox lucius, in Lake Windermere

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Abstract
The annual consumption of food, the annual production, and the yield of pike in Windermere are determined from equations devised by Beverton and Holt (1957). The determination of the various population parameters is described and these are combined with the results obtained from the experimental determination of food consumption to provide numerical solutions. Prior to the start of heavy exploitation in 1944 the biomass is estimated to have been 8182 kg with an annual consumption of 22,124 kg. After 10 years of fishing the biomass has been reduced to 4349 kg with a consumption of 16,563 kg; this represents a 47% reduction in biomass for a 25% reduction in consumption. These results are discussed in terms of cropping the annual production of the lake.

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