Factors Influencing the Countability of Animals

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Date
1969
Authors
Graham, A.
Bell, R.
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Abstract
Theoretically all the animals in a given tract of country could be counted by a human observer. In practice we produce estimates based on the number of animals actually seen and counted, corrected to make up the total we consider to be present. With crocodiles for instance we are unlikely to count more than a third of the animals present (A. Graham1968). This paper attempts to define the more important factors governing this "countability" of animals, in this instance taken to mean "the extent to which an observer can discriminate and record the individual animals in his field of view". Only those aspects of relevance to aerial counting are emphasized.
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East African Agricultural and Forestry Journal, XXXIV (SPECIAL), pp. 38-43
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