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Habitat Heterogeneity and Tube-Dwelling Behavior of Larval Chironomidae: Implications for Prey Vulnerablilty

Abstract Laboratory experiments were used to determine what factors might affect predation on larvae of Glyptotendipes spp. (Diptera: Chironomidae) by Gambusia holbrooki (Baird and Girard). Tube presence, tube construction material, prey size, and habitat heterogeneity were examined as factors influencing predation. Tube presence significantly reduced predation by G. holbrooki, and large larvae were preyed on significantly more often than were small larvae. Predation was not significantly affected by differing levels of habitat heterogeneity.