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10 results for “Enchenopa”
Maternal effects on the advertisement signals and mate preferences of adult offspring in Enchenopa treehoppers (Hemiptera: Membracidae)
<p>We tested for maternal effects on the mating signals and mate preferences of adult offspring in a plant-feeding insect that communicates via plant-borne vibrational signals. We experimentally manipulated an aspect of the social environment experienced by egg-laying mothers: aggregation density. We detected a strong maternal effect in a male signal trait, with sons of mothers that experienced low aggregation density signaling more. We also detected a weak maternal effect on female mate preferences, with daughters of mothers that experienced low aggregation density being less selective. We discuss the evolutionary consequences of these maternal effects in terms of the signal-preference relationship; the maintenance of variation under selection; whether they may be beneficial for offspring; and potential mechanisms that may be involved in their expression.</p>
Effects of the maternal social environment on the mating signals and mate preferences of adult offspring in Enchenopa treehoppers
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Data from: Temperature coupling of mate attraction signals and female mate preferences in four populations of Enchenopa treehoppers (Hemiptera: Membracidae)
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The function of prolonged copulations in monandrous Enchenopa treehoppers (Hemiptera: Membracidae)
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The function of the female mimic signal in Enchenopa binotata treehoppers
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Data from: Local population density and group composition influence signal-preference relationships in Enchenopa treehoppers (Hemiptera: Membracidae)
Many animals exhibit social plasticity—changes in phenotype or behavior in response to experience with conspecifics—that change how evolutionary processes like sexual selection play out. Here, we asked whether social plasticity arising from variation in local population density in male advertisement signals and female mate preferences influences the form of sexual selection. We manipulated local density and determined whether this changed how the distribution of male signals overlapped with female preferences—i.e., the signal-mate preference relationship. We specifically look at the shape of female mate preference functions, which, when compared to signal distributions, provide hypotheses about the form of sexual selection. We used Enchenopa binotata treehoppers, a group of plant feeding insects that exhibit natural variation in local densities across individual host plants, populations, species, and years. We measured male signal frequency and female preference functions across the density treatments. We found that male signals varied across local social groups, but not according to local density. By contrast, female preferences varied with local density—favoring higher signal frequencies in denser environments. Thus, local density changes the signal-preference relationship and, consequently, the expected form of sexual selection. We found no influence of sex ratio on the signal-preference relationship. Our findings suggest that plasticity arising from variation in local group density and composition can alter the form of sexual selection with potentially important consequences both for the maintenance of variation and for speciation.
Data from: Local population density and group composition influence signal-preference relationships in Enchenopa treehoppers (Hemiptera: Membracidae)
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Patterns of Thermal Sensitivity and Sex-Specificity of Courtship Behavior Differs Between Two Sympatric Species of Enchenopa Treehopper
<p> </p> <p>Predicting how insects will react to future thermal conditions requires understanding how temperature currently affects insect behavior, from performance traits to those involved in mating and reproduction. Many reproductive behaviors are thermally-sensitive, but little is known how temperature affects the behaviors used to find mates and coordinate mating. Here, we investigate how temperature influences courtship activity in two sympatric species of <i>Enchenopa </i>treehoppers (Hemiptera: Membracidae). <i>Enchenopa </i>use substrate-borne vibrational signals exchanged in male-female duets to facilitate pair formation prior to mating. In a controlled laboratory setting, we assessed the likelihood of males and females to produce courtship signals across a range of ecologically relevant temperatures. We found that changes in courtship activity across temperatures differed between the two species. We also found sex differences within species: in one species males were more likely to signal at higher temperatures, while in the other species females were more likely to signal at higher temperatures. Our results suggest that sex-specific responses to temperature may constrain mating to narrower ranges of temperatures. Furthermore, sympatric species may respond differently to changes in thermal variation despite sharing similar climactic history.<br> </p>
Data from: Genotype × environment interaction in the allometry of body, genitalia, and signal traits in Enchenopa treehoppers (Hemiptera: Membracidae)
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Patterns of thermal sensitivity and sex-specificity of courtship behavior differs between two sympatric species of Enchenopa treehopper
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