02782nas a2200289 4500008004100000245017800041210006900219260001600288300001400304490000700318520179900325653002102124653002202145653003202167653001402199653002402213653002802237653002102265653002702286100002202313700001802335700001602353700001602369700001902385700001902404856006902423 2005 eng d00aInheritance of song and stridulatory peg number divergence between Chorthippus brunneus and C. jacobsi, two naturally hybridizing grasshopper species (Orthoptera: Acrididae)0 aInheritance of song and stridulatory peg number divergence betwe cJan-05-2005 a703 - 7120 v183 a

Knowledge of the genetic basis of divergence in mating signal characters that contribute to reproductive isolation is critical to understanding speciation. Here, we describe a semi-automated system for characterizing grasshopper acoustic signals. We used this system to study the genetic basis of divergence in three male calling song components [echeme (EL), syllable (SL) and phrase (PL) lengths] between Chorthippus brunneus and C. jacobsi , two species of grasshoppers that hybridize in northern Spain. We also studied the number of pegs in the stridulatory file. For all characters, additive effects accounted for most of the genetic differentiation between species. However, the three song components also showed small but significant epistatic effects. No sex linkage was detected. Wright–Castle–Lande estimates of the minimum numbers of genetic factors underlying song and peg number divergence were low: peg number ( n e ¼ 5.87 ± 5.84), SL ( n e ¼ 2.37 ± 4.79) and PL ( n e ¼ 0.87 ± 0.86). On the other hand, EL appeared to be controlled by many genes. These results suggest that divergence in SL and PL might be driven by sexual selection whereas EL might not be under selection. This is consistent with experimental results on female song preference in related species. However, the fact that few factors appear to underlie the differences in peg number is surprising. Peg number is not closely related to song characteristics. It often varies between closely related grasshopper species and it has been assumed to be a neutral character. The biometrical approaches used here tend to underestimate the number of factors influencing a trait but provide valuable background for subsequent quantitative trait loci analyses.

10aadditive effects10adominance effects10aeffective number of factors10aepistasis10amosaic hybrid zones10aquantitative trait loci10asexual selection10awavelet transformation1 aSadamando, C., I.1 aMiyaguchi, S.1 aTatsuta, H.1 aKishino, H.1 aBridle, J., R.1 aButlin, R., K. uhttp://blackwell-synergy.com/doi/abs/10.1111/jeb.2005.18.issue-301989nas a2200241 4500008004100000245013200041210006900173300001200242490000700254520119000261653001401451653001401465653001601479653001701495653001101512653001701523653001501540653000901555653001301564100001801577700002101595856013101616 1988 eng d00aThe songs and taxonomy of the grasshoppers of the Chorthippus biguttulus group in the Iberian Peninsula (Orthoptera: Acrididae)0 asongs and taxonomy of the grasshoppers of the Chorthippus bigutt a897-9290 v223 a

The Chorthippus biguttulus group includes a number of common European species that are difficult to distinguish morphologically but are easily recognized in the field by the distinctive calling songs of the males. These song-patterns have not previously been studied in Spain and as a result the Iberian members of the group have been misidentified in almost all the extensive Spanish literature on the ecology and cytogenetics of these insects. In this study the male calling songs of all six members of the group known from the Iberian Peninsula and North Africa are fully described and illustrated with oscillograms at several different speeds. The songs of the three species known only from Iberia or North Africa, jacobsi, yersini and marocanus, are fully described for the first time (marocanus is here raised in rank from subspecies). Notes on recognition, using both morphology and song, are given for each species, and two identification keys are provided, one based on morphology and the other on song. It is shown that the three species biguttulus, brunneus and mollis, previously believed to be widespread in Iberia, are absent from most of the peninsula.

10aacoustics10aAcrididae10aChorthippus10agrasshoppers10aIberia10aNorth Africa10aOrthoptera10asong10ataxonomy1 aRagge, D., R.1 aReynolds, W., J. uhttps://bio.acousti.ca/pt-pt/content/songs-and-taxonomy-grasshoppers-chorthippus-biguttulus-group-iberian-peninsula-orthoptera