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Environmental Modification of Habitat Selection in Adult Damselflies
Vol. 47, No. 4 (Jun., 1966), pp. 674-676
Stable URL: http://www.jstor.org/stable/1933953
Page Count: 3
You can always find the topics here!Topics: Habitat preferences, Habitat selection, Lentic systems, Species, Lotic systems, Larvae, Control groups, Aquatic habitats, Female animals, Water currents
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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.
Ecology © 1966 Wiley