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Population Structure and Dynamics of the Tropical Butterfly Heliconius ethilla

Paul R. Ehrlich and Lawrence E. Gilbert
Biotropica
Vol. 5, No. 2 (Sep., 1973), pp. 69-82
DOI: 10.2307/2989656
Stable URL: http://www.jstor.org/stable/2989656
Page Count: 14
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Population Structure and Dynamics of the Tropical Butterfly Heliconius ethilla
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Abstract

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.

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