01289nas a2200157 4500008004100000022001300041245014200054210006900196260001600265300001600281490000700297520072100304100002301025700001701048856006601065 1992 eng d a0003347200aVariability in call structure and pairing success of male field crickets, Gryllus bimaculatus: the effects of age, size and parasite load0 aVariability in call structure and pairing success of male field  cJan-12-1992 a1145 - 11520 v443 a

The effects of male body size, age and gregarine parasite load on the structure of calls and success at attracting mates were investigated in a natural population of the field cricket, Gryllus bimaculatus. The syllable rate within chirps was negatively related to male size, and the duration of syllables was positively related to size. Older males had more variable syllable rates within their chirps. Size did not influence pairing success. However, paired males were significantly older than solitary calling males. Parasitic infection influenced the pairing success of young males but not old males. These data are discussed in the context of direct and indirect selection for female mating preferences.

1 aSimmons, Leigh, W.1 aZuk, Marlene uhttp://linkinghub.elsevier.com/retrieve/pii/S000334720580326402351nas a2200145 4500008004100000022001300041245010700054210006900161260001600230300001400246490000700260520184900267100002302116856006602139 2004 eng d a0003347200aGenotypic variation in calling song and female preferences of the field cricket Teleogryllus oceanicus0 aGenotypic variation in calling song and female preferences of th cJan-08-2004 a313 - 3220 v683 a

Geographically isolated populations often show phenotypic divergence in traits important in reproduction. A large proportion of the phenotypic variation in temporal parameters of the calling song of the field cricket Teleogryllus oceanicus is related to geographical location. Similarity between the songs recorded in different populations reflects geographical proximity. I used a common-garden breeding experiment to determine whether differences between the songs of two populations from the extremes of the geographical and phenotypic distribution (Oahu, Hawaii and Cairns, Australia) have a genetic basis. Differences in the total song duration and the proportion of the long-chirp element in the song remained after five generations of common-garden breeding, indicating that the populations had diverged genetically for these traits. Differences in a third song trait, the intervals between sound pulses and chirps, disappeared after common-garden breeding, suggesting that either the difference between populations in these traits represents phenotypic plasticity or the populations converged as a result of adaptation to the laboratory environment. A prospective analysis of the patterns of genetic variation within populations is presented. Full-sib analyses suggested high levels of genetic variability in song traits. Family mean covariance matrices suggested that populations differ in the genetic architecture of their songs. Females from both populations preferred songs with a high proportion of the long-chirp element, and preferences appeared to have high genetic and residual variability, although the sampling variances on these parameters were high. There was little evidence of a correlation between female preference for the long-chirp element and the amount of the long-chirp element produced by their brothers.

1 aSimmons, Leigh, W. uhttp://linkinghub.elsevier.com/retrieve/pii/S000334720400165401425nas a2200157 4500008004100000022001400041245011400055210006900169260001600238300001200254490000600266520090000272100002401172700002301196856004801219 1991 eng d a0892-755300aMale-male behavior and sexual dimorphism of the ear of a zaprochiline tettigoniid (Orthoptera: Tettigoniidae)0 aMalemale behavior and sexual dimorphism of the ear of a zaprochi cJan-01-1991 a51 - 650 v43 a

The external anatomy of the auditory system of an undescribed zaprochiline tettigoniid (Genus nov. 22 Sp. 1, Australian National Insect Collection, Canberra) shows sexual dimorphism: the male appears to have no auditory spiracle equivalent to that seen in the female. Nocturnally active males aggregate around female required nectar sources in a random manner with regard to each other. There is limited evidence, either from song interaction or from their behavior in the field, that males respond to each other by acoustic cues. Laboratory trials, testing male phonotaxis, showed that movement was random with respect to a target group of caged calling males. In the field, the only signs of agonistic behavior consisted of an increased calling rate when males were close together. Taken together, these data suggest that the male may not preceive sound in the same way as the female.

1 aBailey, Winston, J.1 aSimmons, Leigh, W. uhttp://link.springer.com/10.1007/BF0109255101541nas a2200169 4500008004100000022001300041245011100054210006900165260001600234300000800250490000700258520098500265100001701250700002501267700002301292856005601315 1998 eng d a0014382000aCalling Songs of Field Crickets (Teleogryllus oceanicus) With and Without Phonotactic Parasitoid Infection0 aCalling Songs of Field Crickets Teleogryllus oceanicus With and  cJan-02-1998 a1660 v523 a

The field cricket Teleogryllus oceanicus has been introduced to Hawaii, where it is parasitized by an acoustically orienting parasitoid fly, Ormia ochracea. Previous work showed that call parameters from parasitized populations differ from those in unparasitized populations in a direction expected if selection by flies is occurring. Here we examined songs of males collected in the field and compare calling song characters of crickets later found to harbor parasitoid larvae with those of males free of parasitoids. The two groups differ significantly in several song characteristics, particularly the trill-like long chirp given at the beginning of each song. Males with longer long chirps containing shorter interpulse intervals are more likely to be parasitized, suggesting that the flies find such males more attractive. Depending on the traits females prefer, sexual selection may oppose natural selection in altering T. oceanicus song in parasitized populations.

1 aZuk, Marlene1 aRotenberry, John, T.1 aSimmons, Leigh, W. uhttp://www.jstor.org/stable/2410931?origin=crossref