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Environmental Modification of Habitat Selection in Adult Damselflies

Clifford Johnson
Ecology
Vol. 47, No. 4 (Jun., 1966), pp. 674-676
Published by: Wiley
DOI: 10.2307/1933953
Stable URL: http://www.jstor.org/stable/1933953
Page Count: 3
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Environmental Modification of Habitat Selection in Adult Damselflies
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Abstract

The adult habitat preferences of four damselfly species were analysed to determine whether their choices could be modified by environmental conditions at the site of adult emergence. Four species occurring in southwestern New Mexico were studies. Hetaerina americana, Hyponeura lugens, and Ischnura demorsa prefer lotic waters while I. damula favors lentic conditions. Last instar larvae of each species were transferred from their favored habitat so upon emergence the adult would be initially confronted with an environment unlike that preferred by the species. Such larvae composed the experimental group for each species. Control groups provided observations on habitat preference from individuals known to have emerged from the favored habitats. Chi-square analysis indicates a significant modification of behavior occurred in all four experimental groups. Heritability of habitat selection is not sufficiently understood for use in evolutionary studies.

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