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dc.contributor.advisorHarris, Marvin K.en_US
dc.creatorCalixto, Alejandro Antonioen_US
dc.date.accessioned2010-01-15T00:12:45Zen_US
dc.date.accessioned2010-01-16T01:08:24Z
dc.date.available2010-01-15T00:12:45Zen_US
dc.date.available2010-01-16T01:08:24Z
dc.date.created2008-08en_US
dc.date.issued2009-05-15en_US
dc.identifier.urihttp://hdl.handle.net/1969.1/ETD-TAMU-2956
dc.description.abstractHigher densities of S. invicta in the United States relative to South America are explained mainly by the absence of natural enemies and low interspecific competition (IC). Despite advances in S. invicta management, broadcast insecticide baits remain as the primary tool for effective control. I studied interspecific interactions of ants and the use of baits on the management of S. invicta to test the following hypotheses: 1) relative abundance of native ants increases ~25% for bait treated sites compared to untreated, 2) behavioral dominance by S. invicta decreases ~10% in bait treated sites compared to untreated, and, 3) foraging by S. invicta on insecticide baits is higher ~10% in low native ant densities areas compared to high densities. Experiments were conducted on three sites with different densities of native ants (low, medium, high), but with similar densities of S. invicta. An enhanced BACI (Before/After-Control/Impact) design was used. Experimental units consisted of 0.4 ha plots. Three treatments were randomly assigned to units and replicated four times; 1) Slow acting bait, 2) Fast acting bait, 3) Untreated Control. Samples and observations were collected for several weeks before/after the treatments to account for temporal variation and to determine rates of reinvasion. Ants were monitored using pitfalls and food lures. Interspecific competition was determined by applying placebo bait. Results indicate that different management methods did not impact resident ants when they are at low and medium densities and that S. invicta is greatly affected; at high native ant density, competition for these baits is observed affecting both natives and S. invicta. Reinvasion of S. invicta was reduced in areas of low and medium native ant densities previously treated with baits and native ant abundance increased by ~25%. At high native ant densities, reinvasion of S. invicta was similar to Control sites. I conclude: 1) properly used, baits can help in recovery of native ant species that then compete with S. invicta; however, rote re-treatments may have a negative impact on restored populations. 2) “bait failures” may be due to interspecific competition when initial native ant densities are high. Preliminary management considerations and recommendations are presented.en_US
dc.format.mediumelectronicen_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.subjectFiltersen_US
dc.subjectCompetitionen_US
dc.subjectBait failuresen_US
dc.subjectPost Oak Savannahen_US
dc.subjectCentral Texasen_US
dc.subjectSolenopsis invictaen_US
dc.subjectResident antsen_US
dc.titleImplications of Relative Ant Abundance and Diversity for the Management of Solenopsis Invicta Buren with Broadcast Baitsen_US
dc.typeBooken
dc.typeThesisen
thesis.degree.departmentEntomologyen_US
thesis.degree.disciplineEntomologyen_US
thesis.degree.grantorTexas A&M Universityen_US
thesis.degree.nameDoctor of Philosophyen_US
thesis.degree.levelDoctoralen_US
dc.contributor.committeeMemberBarr, Charles L.en_US
dc.contributor.committeeMemberMedina, Raul F.en_US
dc.contributor.committeeMemberMorrison, Michael L.en_US
dc.contributor.committeeMemberVinson, Braden_US
dc.type.genreElectronic Dissertationen_US
dc.type.materialtexten_US
dc.format.digitalOriginborn digitalen_US


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