SEXUAL SELECTION AND SEXUAL DIFFERENCES IN MORMON CRICKETS (ORTHOPTERA: TETTIGONIIDAE, ANABRUS SIMPLEX )
نویسندگان
چکیده
منابع مشابه
Measuring sexual selection on females in sex-role-reversed Mormon crickets (Anabrus simplex, Orthoptera: Tettigoniidae).
Although many studies examine the form of sexual selection in males, studies characterizing this selection in females remain sparse. Sexual selection on females is predicted for sex-role-reversed Mormon crickets, Anabrus simplex, where males are choosy of mates and nutrient-deprived females compete for matings and nutritious nuptial gifts. We used selection analyses to describe the strength and...
متن کاملAge- and density-dependent prophylaxis in the migratory, cannibalistic Mormon cricket Anabrus simplex (Orthoptera: Tettigoniidae).
As a result of the increased potential for disease transmission, insects are predicted to show an increased constitutive immunity when crowded. Cannibalistic aggressive interactions further increase the risk of wounding and pathogen transmission in crowds. Nymphal Mormon crickets Anabrus simplex Haldeman were collected in Montana and reared in the laboratory either solitarily or at densities s...
متن کاملSexual selection and speciation in field crickets.
Recent theoretical work has shown that sexual selection may cause speciation under a much wider range of conditions than previously supposed. There are, however, no empirical studies capable of simultaneously evaluating several key predictions that contrast this with other speciation models. We present data on male pulse rates and female phonotactic responses to pulse rates for the field cricke...
متن کاملLocal population density and the activation of movement in migratory band-forming Mormon crickets
The Mormon cricket, Anabrus simplex (Orthoptera: Tettigoniidae), is a flightless katydid that undergoes major outbreaks in western North America. Under outbreak conditions, Mormon crickets often form large cohesive migratory bands that can contain millions of individuals moving in unison across the landscape. Density-dependent phase polyphenism has been hypothesized as a behavioural mechanism u...
متن کاملDispersal differences predict population genetic structure in Mormon crickets.
Research investigating the geographical context of speciation has primarily focused on abiotic factors such as the role of Pleistocene glacial cycles, or geotectonic events. Few study systems allow a direct comparison of how biological differences, such as dispersal behaviour, affect population genetic structure of organisms that were subdivided during the Pleistocene. Mormon crickets exist in ...
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ژورنال
عنوان ژورنال: Evolution
سال: 1984
ISSN: 0014-3820,1558-5646
DOI: 10.1111/j.1558-5646.1984.tb00371.x