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Population Structure and Dynamics of the Tropical Butterfly Heliconius ethilla
Paul R. Ehrlich and Lawrence E. Gilbert
Vol. 5, No. 2 (Sep., 1973), pp. 69-82
Published by: Association for Tropical Biology and Conservation
Stable URL: http://www.jstor.org/stable/2989656
Page Count: 14
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Capture-recapture studies of a Heliconius ethilla colony occupying a ridge in northern Trinidad were carried out over a 27-month period. Individuals had limited home ranges based primarily on the distribution of pollen sources which were visited in the course of daily activity. These ranges fell into two virtually discrete sets, dividing the colony into two populations which rarely exchanged individuals. The size of the two populations, and thus of the colony, remained remarkably stable over the entire course of the study, which covered about 27 generations. This constancy appears to result from a combination of high preadult mortality, long adult life, and limited adult resources which in turn limit total egg production.
Biotropica © 1973 Association for Tropical Biology and Conservation