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PN0908 - Methods for estimating daily food intake of wild birds and mammals

PN0908 - The Food and Environment Research Agency( FERA) - 2002

Executive Summary

If the risks to non-target wildlife posed by pesticides and other contaminants of their foods are to be properly assessed then we need good quantitative information about wildlife daily food intake. Such information is difficult to obtain. There is however increasing information on the Daily Energy Expenditure ( DEE) of free-ranging birds and mammals. When combined with information on the energetic values of wildlife foods and the efficiency with which they are assimilated, it is possible to estimate the likely daily food intake. We have reviewed data on DEE of wild birds and mammals and data on their digestive efficiency. We have collated data on energy and moisture values of wildlife foods. For 82 scenarios of UK birds and mammals feeding on different foods, we have calculated their likely daily food intake. We discuss advantages and limitations of the method and outline how the data may be used in deterministic and probabilistic risk assessments to predict food intake.

Full Report

Methods for estimating daily food intake of wild birds and mammals (pdf, 22 pages).

Further information

Updated 2016-12-21