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Articles 151 - 156 of 156
Full-Text Articles in Ecology and Evolutionary Biology
Multivariate Sexual Selection On Male Song Structure In Wild Populations Of Sagebrush Crickets, Cyphoderris Strepitans (Orthoptera: Haglidae), Scott K. Sakaluk, Sandra Steiger, John Hunt, Geoffrey D. Ower, Kevin A. Judge, Rebecca A. Smith, Kyle J. Caron
Multivariate Sexual Selection On Male Song Structure In Wild Populations Of Sagebrush Crickets, Cyphoderris Strepitans (Orthoptera: Haglidae), Scott K. Sakaluk, Sandra Steiger, John Hunt, Geoffrey D. Ower, Kevin A. Judge, Rebecca A. Smith, Kyle J. Caron
Faculty Publications – Biological Sciences
While a number of studies have measured multivariate sexual selection actingon sexual signals in wild populations, few have confirmed these findings withexperimental manipulation. Sagebrush crickets are ideally suited to such investi-gations because mating imposes an unambiguous phenotypic marker on malesarising from nuptial feeding by females. We quantified sexual selection operat-ing on male song by recording songs of virgin and mated males captured fromthree wild populations. To determine the extent to which selection on malesong is influenced by female preference, we conducted a companion study inwhich we synthesized male songs and broadcast them to females in choicetrials. Multivariate selection analysis revealed …
Detritus Type Alters The Outcome Of Interspecific Competition Between Aedes Aegypti And Aedes Albopictus (Diptera : Culicidae), Ebony G. Murrell, Steven A. Juliano
Detritus Type Alters The Outcome Of Interspecific Competition Between Aedes Aegypti And Aedes Albopictus (Diptera : Culicidae), Ebony G. Murrell, Steven A. Juliano
Faculty Publications – Biological Sciences
Many studies of interspecific competition between Aedes albopictus (Skuse) and Aedes aegypti (L.) (Diptera: Culicidae) larvae show that Ae. albopictus are superior resource competitors to Ae. aegypti. Single-species studies indicate that growth and survival of Ae. albopictus and Ae. aegypti larvae are affected by the type of detritus present in containers, which presumably affects the amount and quality of microorganisms that the mosquito larvae consume. We tested whether different detritus types alter the intensity of larval competition by raising 10 different density/species combinations of Ae. albopictus and Ae. aegypti larvae under standard laboratory conditions, with one of four detritus types …
Asymmetrical Competition And Patterns Of Abundance Of Aedes Albopictus And Culex Pipiens (Diptera : Culicidae), Katie S. Costanzo, Kimberly Mormann, Steven A. Juliano
Asymmetrical Competition And Patterns Of Abundance Of Aedes Albopictus And Culex Pipiens (Diptera : Culicidae), Katie S. Costanzo, Kimberly Mormann, Steven A. Juliano
Faculty Publications – Biological Sciences
We tested for competitive advantage among larvae of Aedes albopictus (Skuse) and Culex pipiens L. in a laboratory experiment and determined the frequency and spatial and temporal patterns of co-occurrence in the field in East St. Louis, IL. In a laboratory competition experiment at multiple combined densities of Ae. albopictus and Cx. pipiens larvae, Ae. albopictus survivorship, and developmental times were significantly affected by conspecific densities but not by Cx. pipiens densities. In contrast, Cx. pipiens survivorship, and developmental times were significantly affected by both conspecific and Ae. albopictus densities. Per capita rate of increase (r') for Ae. albopictus cohorts …
Convergent Habitat Segregation Of Aedes Aegypti And Aedes Albopictus (Diptera : Culicidae) In Southeastern Brazil And Florida, Marieta A H Braks, Ricardo Lourenco-De-Oliveira, Steven A. Juliano, Nildimar A. Honorio, L Philip Lounibos
Convergent Habitat Segregation Of Aedes Aegypti And Aedes Albopictus (Diptera : Culicidae) In Southeastern Brazil And Florida, Marieta A H Braks, Ricardo Lourenco-De-Oliveira, Steven A. Juliano, Nildimar A. Honorio, L Philip Lounibos
Faculty Publications – Biological Sciences
During the rainy season of 2001, the incidence of the dengue vectors Aedes aegypti and Ae. albopictus was examined in different habitats of two cities (Rio de Janeiro and Nova Iguacu) in Rio de Janeiro State, Brazil, and in two cities (Palm Beach and Boca Raton) in Florida. Oviposition trap collections were performed in urban, suburban, and rural habitats in both areas. Our hypothesis that the abundances and frequencies of occurrence of Ae. aegypti and Ae albopictus are affected in opposite ways by increasing urbanization was only partially supported. City, habitat, and their interaction significantly affected the abundance of both …
Precipitation And Temperature Effects On Populations Of Aedes Albopictus (Diptera : Culicidae): Implications For Range Expansion, B W. Alto, Steven A. Juliano
Precipitation And Temperature Effects On Populations Of Aedes Albopictus (Diptera : Culicidae): Implications For Range Expansion, B W. Alto, Steven A. Juliano
Faculty Publications – Biological Sciences
We investigated how temperature and precipitation regime encountered over the life cycle of Aedes albopictus (Skuse) affects populations. Caged populations of A. albopictus were maintained at 22, 26, and 30 degreesC. Cages were equipped with containers that served as sites for oviposition and larval development. All cages were assigned to one of three simulated precipitation regimes: (1) low fluctuation regime - water within the containers was allowed to evaporate to 90% of its maximum before being refilled, (2) high fluctuation regime - water was allowed to evaporate to 25% of its maximum before being refilled, and (3) drying regime - …
Invertebrate Carcasses As A Resource For Competing Aedes Albopictus And Aedes Aegypti (Diptera : Culicidae), M P. Daugherty, B W. Alto, Steven A. Juliano
Invertebrate Carcasses As A Resource For Competing Aedes Albopictus And Aedes Aegypti (Diptera : Culicidae), M P. Daugherty, B W. Alto, Steven A. Juliano
Faculty Publications – Biological Sciences
However, little is known of the role of these carcasses in other containers, which also receive leaf fall and stemflow inputs. This experiment investigated effects of accumulated invertebrate carcasses as a resource for two competing mosquitoes, Aedes albopictus (Skuse) and Aedes aegypti (L.) whether either species differentially benefited from accumulated carcasses, and if such a benefit affected interspecific competition. First, we measured accumulation of invertebrate carcasses in standard containers at a field site. We then used a replacement series with five different species ratios at the same total density: and varied the input of invertebrate carcasses [dead Drosophila melanogaster (Meigen) …