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Document Type

Research

Abstract

Mixed colonies of ants (Formica fossaceps Buren and Formica obscuriventris clivia Creighton) offer unique opportunities to determine the extent to which two species living together share a single communal life. The proportion of workers of the two species present in a single colony differs from colony to colony but is relatively constant over periods lasting up to 16 years. Worker ants from four pure and from four mixed colonies have been measured with the scape as an index of size. The same size series of workers is found in pure and in mixed colonies, but the relative proportion of workers of different sizes in mixed colonies is similar within a given colony from year to year. In certain colonies the mean size of the two species is alike, but in others it is different. Whether these differences are trophogenic or blastogenic has not been determined.

Publication Date

1962

Journal Title

Proceedings of the Iowa Academy of Science

Volume

69

Issue

1

First Page

531

Last Page

539

Copyright

© Copyright 1962 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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