The Analysis of an Animal Population
1939; Wiley; Volume: 8; Issue: 2 Linguagem: Inglês
10.2307/1232
ISSN1365-2656
Autores Tópico(s)Avian ecology and behavior
ResumoIN a previous paper (Jackson, 1936) an account was given of the estimation of a tsetse-fly population through the year by means of the Lincoln Index . Since then certain amendments have become necessary as the mathematical treatment has improved, and the method has been extended to provide estimates of rates of birth, death and dispersal which were previously unobtainable. It is the purpose of this paper to explain and describe these improvements and extensions, as the use of the method seems potentially of wide application in problems of animal ecology. The principle is simple. A random sample of individuals is marked: at some later time a random sample is caught and examined: either the initial marking or the later catching is done evenly over the area selected for study. The second catch includes a certain proportion of individuals recognized by their marks as having been caught in the first sample. Then, subject to conditions considered below, the proportion of recaptures to total taken in the second catch ought to be the same as the proportion initially marked to the total population. That is, the population is equal to
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