Lincoln Index

Lincoln Index

a formula used in estimating animal population sizes through a mark-and-recapture technique. A number of animals are trapped, marked and released back into the population. Assuming no immigration or emigration, and the random distribution of the marked animals throughout the population, the comparison of the numbers of marked and unmarked animals in the second trapping gives an estimate of the population from the formula

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Both Lincoln Index and weighted mean model calculations were used to estimate the number of foraging termites for each delineated colony (Lincoln, 1930; Bailey, 1951; Begon, 1979; Grace et al.
For four of the five colonies evaluated, estimates of foraging populations using the Lincoln Index were smaller than estimates using the weighted mean model.
It is difficult to verify the validity of estimates of termite foraging populations using either Lincoln Index or the weighted mean model.
This difference proved true for both the Lincoln Index and the weighted mean model estimates, and may be attributable to the availability of suitable cellulose resources within each colony's foraging area.
Contrast analysis indicated a moderate difference between Lincoln Index estimates within the prescribed-burn and no-burn areas, (P = 0.
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