@article {Izzo2004Cricket, title = {Cricket Song in Sympatry: Species Specificity of Song without Reproductive Character Displacement inGryllus rubens}, journal = {Annals of the Entomological Society of America}, volume = {97}, number = {4}, year = {2004}, month = {July}, pages = {831{\textendash}837}, keywords = {behaviour, bioacoustics, crickets, orthoptera, song}, issn = {0013-8746}, doi = {10.1603/0013-8746(2004)097\%5B0831:CSISSS\%5D2.0.CO;2}, url = {http://dx.doi.org/10.1603/0013-8746(2004)097\%5B0831:CSISSS\%5D2.0.CO;2}, author = {Izzo, Amanda S. and Gray, David A.} } @article {Mendelson2006Closerange, title = {Close-range acoustic signaling and mate choice in Hawaiian crickets (Gryllidae: Laupala )}, journal = {Behavioral Ecology and Sociobiology}, volume = {59}, number = {6}, year = {2006}, month = {April}, pages = {770{\textendash}776}, abstract = {Abstract\ \ Evolution of the mate recognition system (MRS) can play a central role in animal speciation. One dramatic consequence of changes in the MRS is the failure of individuals from divergent lineages to successfully court and mate, thereby reducing gene flow between these groups. Here, we test the role of an acoustic mating signal on mate choice in a Hawaiian cricket genus (Gryllidae: Laupala). Speciation in Laupala is proceeding at an extremely rapid rate, apparently driven by divergence in aspects of the mate recognition system, most conspicuously the pulse rate of male calling song. Previous studies demonstrate that females prefer the pulse rate of a conspecific male{\textquoteright}s song when perceived at long range, in laboratory phonotaxis trials. In this study, we examined mate choice in two species that differ dramatically in pulse rate: Laupala paranigra and Laupala kohalensis. We tested the female{\textquoteright}s preference in both species for pulse rates at close range, by providing females an opportunity to mate with hybrid males producing a range of intermediate pulse rates. Results of our study demonstrate that while strong behavioral barriers exist between these two species, variation in the pulse rate of male calling song did not predict female mate choice at close range. These results suggest a more complex architecture to mate recognition in Laupala than previously hypothesized.}, keywords = {behaviour, communication, crickets, hawaii, orthoptera}, doi = {10.1007/s00265-005-0107-7}, url = {http://dx.doi.org/10.1007/s00265-005-0107-7}, author = {Mendelson, Tamra and Shaw, Kerry} } @article {Pollack2007Flight, title = {Flight and hearing: ultrasound sensitivity differs between flight-capable and flight-incapable morphs of a wing-dimorphic cricket species}, journal = {J Exp Biol}, volume = {210}, number = {18}, year = {2007}, month = {September}, pages = {3160{\textendash}3164}, abstract = {We studied frequency sensitivity of flight-capable and flight-incapable forms of the wing-dimorphic cricket Gryllus texensis, using both behavioral and neurophysiological measurements. Behavioral thresholds for negative phonotaxis in response to ultrasound stimuli are lower for long-winged (i.e. flight-capable) crickets than for short-winged (flight-incapable) individuals, whereas thresholds for positive phonotaxis in response to a calling-song model do not differ. Similarly, thresholds of the identified interneurons ON1 and AN2 differ between flight morphs for high sound frequencies but not for the frequency of calling song. Our results show that sensitivity to ultrasound is closely linked to flight ability, and thus to the risk of predation from aerially hawking bats. We suggest that sensitivity to ultrasound is one of a suite of flight-associated characteristics, the development of which may be under common hormonal regulation. 10.1242/jeb.008136}, keywords = {bioacoustics, crickets, dimporphism, escape, flight, hearing, orthoptera}, doi = {10.1242/jeb.008136}, url = {http://dx.doi.org/10.1242/jeb.008136}, author = {Pollack, Gerald S. and Martins, Ruben} } @article {Dangles2007Escape, title = {Escape performance decreases during ontogeny in wild crickets}, journal = {J Exp Biol}, volume = {210}, number = {18}, year = {2007}, month = {September}, pages = {3165{\textendash}3170}, abstract = {Increasing the ecological relevance of studies relating to the performance of organisms has been a central issue for functional biologists over the last few years. Of particular concern are changes in performance throughout the life cycle as selective forces act differently on various life stages. We addressed this issue experimentally by following ontogenic variations in the escape performance of crickets threatened by artificial predatory signals. We measured their performance under natural settings, which is a necessary approach yet one that is undocumented in insects. We analysed numeric film sequences obtained using a high-speed video camera at 1000 frames s-1 to quantify wild cricket performance and behaviour in the field. We detected significant differences in cricket escape performance throughout ontogeny. Escape performances were higher in juvenile crickets than older instars. Complementary behavioural measurements for escaping crickets suggest that these variations may be related to the lower predatory risk perceived by large adults than by juveniles. We expect that our analysis of size-refuge will also improve our understanding in the development of performance, given its importance in community and population ecology theories. 10.1242/jeb.004648}, keywords = {cerci, escape, gryllidae, hairs, orthoptera, response}, doi = {10.1242/jeb.004648}, url = {http://dx.doi.org/10.1242/jeb.004648}, author = {Dangles, O. and Pierre, D. and Christides, J. P. and Casas, J.} } @article {Stritih2009Anatomy, title = {Anatomy and physiology of a set of low-frequency vibratory interneurons in a nonhearing ensiferan (Troglophilus neglectus, Rhaphidophoridae)}, journal = {The Journal of Comparative Neurology}, volume = {516}, number = {6}, year = {2009}, month = {October}, pages = {519{\textendash}532}, keywords = {acoustics, neurophysiology, orthoptera, startle}, issn = {00219967}, doi = {10.1002/cne.22138}, url = {http://dx.doi.org/10.1002/cne.22138}, author = {Stritih, Nataša} } @article {Shaw2000Acoustic, title = {Acoustic preference functions and song variability in the Hawaiian cricket Laupala cerasina}, journal = {Proceedings of the Royal Society of London. Series B: Biological Sciences}, volume = {267}, number = {1443}, year = {2000}, month = {March}, pages = {577{\textendash}584}, abstract = {10.1098/rspb.2000.1040 Female preference functions for different sexual traits can differ significantly, from {\textquoteright}unimodal{\textquoteright} to {\textquoteright}open ended{\textquoteright}. Through the study of acoustic communication in anurans, several studies have reported an association between static (stereotyped) traits versus dynamic (variable) traits and preference function shape (unimodal versus open ended, respectively). Observing a similar pattern in a phylogenetically independent group would suggest that deterministic forces have caused a relationship between signal variability and preference function shape in acoustic signalling systems. We examined this phenomenon in crickets, another animal characterized by intersexual acoustic communication. We measured the within{\textendash}male variability for three acoustic features of the male calling song in and the corresponding shape of the female preference function for each of these features. We offer support for the generalization that open{\textendash}ended preference functions correspond to relatively dynamic courtship traits and unimodal preference functions correspond to relatively static courtship traits. We discuss the evolutionary significance of these findings in the context of the natural history of the species radiation.}, keywords = {bioacoustics, crickets, orthoptera, songs}, doi = {10.1098/rspb.2000.1040}, url = {http://dx.doi.org/10.1098/rspb.2000.1040}, author = {Shaw, Kerry L. and Herlihy, Daniel P.} } @article {Hall2008EXPERIMENTAL, title = {EXPERIMENTAL EVIDENCE THAT SEXUAL CONFLICT INFLUENCES THE OPPORTUNITY, FORM AND INTENSITY OF SEXUAL SELECTION}, journal = {Evolution}, volume = {62}, number = {9}, year = {2008}, pages = {2305{\textendash}2315}, address = {Evolution \& Ecology Research Centre and School of Biological, Earth \& Environmental Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia; E-mail: m.hall@student.unsw.edu.au; Zoologisches Museum der Universitt Zrich, Winterthure}, abstract = {Sexual interactions are often rife with conflict. Conflict between members of the same sex over opportunities to mate has long been understood to effect evolution via sexual selection. Although conflict between males and females is now understood to be widespread, such conflict is seldom considered in the same light as a general agent of sexual selection. Any interaction between males or females that generates variation in fitness, whether due to conflict, competition or mate choice, can potentially influence sexual selection acting on a range of male traits. Here we seek to address a lack of direct experimental evidence for how sexual conflict influences sexual selection more broadly. We manipulate a major source of sexual conflict in the black field cricket, Teleogryllus commodus, and quantify the resulting changes in the nature of sexual selection using formal selection analysis to statistically compare multivariate fitness surfaces. In T. commodus, sexual conflict occurs over the attachment time of an external spermatophore. By experimentally manipulating the ability of males and females to influence spermatophore attachment, we found that sexual conflict significantly influences the opportunity, form, and intensity of sexual selection on male courtship call and body size. When males were able to harass females, the opportunity for selection was smaller, the form of selection changed, and sexual selection was weaker. We discuss the broader evolutionary implications of these findings, including the contributions of sexual conflict to fluctuating sexual selection and the maintenance of additive genetic variation.}, keywords = {communication, crickets, mating, orthoptera, sexual-selection}, doi = {10.1111/j.1558-5646.2008.00436.x}, url = {http://dx.doi.org/10.1111/j.1558-5646.2008.00436.x}, author = {Hall, Matthew D. and Bussi{\`e}re, Luc F. and Hunt, John and Brooks, Robert} } @article {Jang2007Reproductive, title = {Reproductive Isolation in the Wood Cricket Gryllus vernalis (Orthoptera: Gryllidae)}, journal = {Ethology}, volume = {113}, number = {1}, year = {2007}, month = {January}, pages = {87{\textendash}96}, publisher = {Blackwell Publishing}, keywords = {bioacoustics, character-displacement, crickets, evolution, orthoptera, rcd, song}, issn = {0179-1613}, doi = {10.1111/j.1439-0310.2006.01304.x}, url = {http://dx.doi.org/10.1111/j.1439-0310.2006.01304.x}, author = {Jang, Yikweon and Bockhorst, Amanda and Carl Gerhardt, Howard} } @article {Jang2006Divergence, title = {Divergence in the calling songs between sympatric and allopatric populations of the southern wood cricket Gryllus fultoni (Orthoptera: Gryllidae)}, journal = {Journal of Evolutionary Biology}, volume = {19}, number = {2}, year = {2006}, month = {March}, pages = {459{\textendash}472}, publisher = {Blackwell Publishing}, keywords = {bioacoustics, character-displacement, competition, evolution, gryllidae, orthoptera, rcd, song}, issn = {1010-061X}, doi = {10.1111/j.1420-9101.2005.01014.x}, url = {http://dx.doi.org/10.1111/j.1420-9101.2005.01014.x}, author = {Jang, Y. and Gerhardt, H. C.} } @article {Riede1998Acoustic, title = {Acoustic monitoring of Orthoptera and its potential for conservation}, journal = {Journal of Insect Conservation}, volume = {2}, number = {3}, year = {1998}, month = {December}, pages = {217{\textendash}223}, abstract = {Songs of Orthoptera can be used for inventorying and monitoring of individual species and communities. Acoustic parameters such as carrier frequency and pulse rates allow the definition of recognizable taxonomic units (RTUs) which help to overcome the taxonomic impediment due to our scanty knowledge, particularly of tropical faunas. Bioacoustic diversity is a first estimate for species richness and provides baseline data which can be a prerequisite for conservation. Additional ecological and behavioural information such as habitat preference and singing schedules can be inferred. Many Orthoptera are sensitive indicator species for habitat quality in temperate and tropical ecosystems. Examples are given for evaluation of habitat quality and deterioration by acoustic detection of Orthoptera.}, keywords = {acoustic\_detection, acoustic\_parameters, annotation, asr, biodiversity, carrier\_frequency, indicator\_species, orthoptera, species\_richness, taxonomic\_impediment, taxonomic\_units}, doi = {10.1023/A:1009695813606}, url = {http://www.groms.de/data/zoology/riede/RiedeetalJOR06.pdf}, author = {Riede, Klaus} } @article {MoradianRelationships, title = {Relationships between body size and sound-producing structures in crickets: do large males have large harps?}, journal = {Invertebrate Biology}, volume = {127}, number = {4}, year = {Submitted}, pages = {444{\textendash}451}, publisher = {Blackwell Publishing}, keywords = {bioacoustics, crickets, harps, orthoptera, relationships, songs}, issn = {1077-8306}, doi = {10.1111/j.1744-7410.2008.00142.x}, url = {http://dx.doi.org/10.1111/j.1744-7410.2008.00142.x}, author = {Moradian, Nima R. and Walker, Sean E.} } @article {Wong2009Heterospecific, title = {Heterospecific Acoustic Interference: Effects on Calling in the FrogOophaga pumilioin Nicaragua}, journal = {Biotropica}, volume = {41}, number = {1}, year = {2009}, month = {January}, pages = {74{\textendash}80}, publisher = {Blackwell Publishing}, keywords = {americas, bioacoustics, calling, frogs, interference, orthoptera}, issn = {00063606}, doi = {10.1111/j.1744-7429.2008.00452.x}, url = {http://dx.doi.org/10.1111/j.1744-7429.2008.00452.x}, author = {Wong, Stefanie and Parada, Humberto and Narins, Peter M.} } @article {Vedenina2007Unusual, title = {The unusual inheritance pattern of the courtship songs in closely related grasshopper species of the Chorthippus albomarginatus-group (Orthoptera: Gomphocerinae).}, journal = {Journal of evolutionary biology}, volume = {20}, number = {1}, year = {2007}, month = {January}, pages = {260{\textendash}277}, abstract = {Sibling species of the Chorthippus albomarginatus-group are exceptional among all European grasshopper species because they have an extremely elaborate courtship behaviour. Here, we present a genetic analysis of the courtship song differences between two closely related grasshopper species Ch. albomarginatus and Ch. oschei. Measurements of seven courtship song characters and one parameter of courtship visual display were compared among parentals, F(1) and F(2) hybrids, and backcrosses. Variation in one morphological character, the number of stridulatory pegs, was studied as well. The distributions of song phenotypes were more consistent with a type-III genetic architecture, which involves complementary or duplicate pairs of loci. We suggest that this type of architecture may provide the novel elements of the hybrid songs, even more complex than the parental ones, which may offer a new starting point for sexual selection. One parameter of the visual display appeared to be controlled by a single locus, but differences in other characters of visual display could be explained by a more complex inheritance pattern. Inheritance of the peg number differences was consistent with a simple polygenic additive model. Sex linkage and/or maternal effects were not detected for any trait. We found a disproportionate influence of the Ch. albomarginatus parent on most hybrid song characteristics and the visual display, and this may support a previously suggested idea that Ch. albomarginatus is an ancestral form and Ch. oschei is a derived species.}, keywords = {acrididae, bioacoustics, grasshoppers, orthoptera, song}, issn = {1010-061X}, doi = {10.1111/j.1420-9101.2006.01204.x}, url = {http://dx.doi.org/10.1111/j.1420-9101.2006.01204.x}, author = {Vedenina, V. Yu and Panyutin, A. K. and Von Helversen, O.} } @article {2004Classification, title = {Classification of bioacoustic time series based on the combination of global and local decisions}, journal = {Pattern Recognition}, volume = {37}, number = {12}, year = {2004}, month = {December}, pages = {2293{\textendash}2305}, abstract = {Automated classification of cricket songs from Thailand and Ecuador is the topic of this study. For this, the locations of pulses are determined and different features in the time and the frequency domain are extracted automatically from the time series. For the categorization of the sound patterns these features are combined through data fusion, temporal fusion and decision fusion. Local features and global features are distinguished. For the classification a fuzzy- k -nearest-neighbour classifier was used. Classification results for a data set containing songs of 28 different species are presented.}, keywords = {asr, bioacoustics, classification, crickets, databases, orthoptera, sound\_recognition}, issn = {00313203}, doi = {10.1016/j.patcog.2004.04.004}, url = {http://dx.doi.org/10.1016/j.patcog.2004.04.004} } @article {Mews2008Two, title = {Two new species of Phalangopsis Serville, 1831 (Orthoptera: Grylloidea: Phalangopsidae) from Brazilian Amazon Forest}, journal = {Anais da Academia Brasileira de Ci{\^e}ncias}, volume = {80}, number = {4}, year = {2008}, month = {December}, keywords = {brazil, caves, crickets, fauna, grylloidea, neotropics, orthoptera, phalangopsinae, systematics, taxonomy}, issn = {0001-3765}, doi = {10.1590/S0001-37652008000400006}, url = {http://dx.doi.org/10.1590/S0001-37652008000400006}, author = {Mews,, Carina .. and Sperber,, Carlos ..} } @article {Ritchie2000Inheritance, title = {The inheritance of female preference functions in a mate recognition system}, journal = {Proceedings of the Royal Society of London. Series B: Biological Sciences}, volume = {267}, number = {1441}, year = {2000}, month = {February}, pages = {327{\textendash}332}, abstract = {10.1098/rspb.2000.1004 Mate recognition systems (MRSs) play a major role in sexual selection and speciation, yet few studies have analysed both male and female components in detail. Here, female preference functions have been characterized for the tettigoniid bushcricket , and the inheritance of male song and female preference functions followed in crosses between subspecies. Songs are disproportionately determined by sex{\textendash}linked genes. However, there is no evidence for a role of maternally derived sex{\textendash}linked genes in female preference or of maternal effects. At the genetic level, there is a mismatch between peak preferences and male song, consistent with an evolutionary history of persistent directional preferences. Such a pattern of inheritance could contribute to the process of speciation via the evolution of new MRSs.}, keywords = {ephippiger, evolution, genetics, mrs, orthoptera, preference, recognition, speciation}, doi = {10.1098/rspb.2000.1004}, url = {http://dx.doi.org/10.1098/rspb.2000.1004}, author = {Ritchie, Michael G.} } @article {Laird2004Extreme, title = {Extreme repeated mating as a counter{\textendash}adaptation to sexual conflict?}, journal = {Proceedings of the Royal Society of London. Series B: Biological Sciences}, volume = {271}, number = {Suppl 6}, year = {2004}, month = {December}, pages = {S402{\textendash}S404}, abstract = {10.1098/rsbl.2004.0198 The Australian scaly cricket, , can copulate over 50 times with the same partner; the benefits of such extreme repeated copulation are unclear. We support the hypothesis that repeated copulation increases insemination success, as the number of sperm transferred increases with each spermatophore. This probably increases paternity for males, as on average a female mates with over 40 males. Despite intense sperm competition each ejaculate has only a few hundred sperm, orders of magnitude less than in related crickets. We show that all sperm are transferred from each spermatophore in the few seconds before a female removes and eats it. Repeated copulation increases effective copulation duration while a small ejaculate ensures that this strategy is not excessively costly. Thus repeated copulation in these crickets may have arisen as a counter{\textendash}adaptation to female{\textendash}imposed limits on copulation.}, keywords = {copulation, mogoplistinae, ornebius, orthoptera}, doi = {10.1098/rsbl.2004.0198}, url = {http://dx.doi.org/10.1098/rsbl.2004.0198}, author = {Laird, G. and Gwynne, D. T. and Andrade, M. C. B.} } @article {Hurst2005Problems, title = {Problems with mitochondrial DNA as a marker in population, phylogeographic and phylogenetic studies: the effects of inherited symbionts}, journal = {Proceedings of the Royal Society B: Biological Sciences}, volume = {272}, number = {1572}, year = {2005}, month = {August}, pages = {1525{\textendash}1534}, abstract = {10.1098/rspb.2005.3056 Mitochondrial DNA (mtDNA) has been a marker of choice for reconstructing historical patterns of population demography, admixture, biogeography and speciation. However, it has recently been suggested that the pervasive nature of direct and indirect selection on this molecule renders any conclusion derived from it ambiguous. We review here the evidence for indirect selection on mtDNA in arthropods arising from linkage disequilibrium with maternally inherited symbionts. We note first that these symbionts are very common in arthropods and then review studies that reveal the extent to which they shape mtDNA evolution. mtDNA diversity patterns are compatible with neutral expectations for an uninfected population in only 2 of 19 cases. The remaining 17 studies revealed cases of symbiont-driven reduction in mtDNA diversity, symbiont-driven increases in diversity, symbiont-driven changes in mtDNA variation over space and symbiont-associated paraphyly of mtDNA. We therefore conclude that these elements often confound the inference of an organism{\textquoteright}s evolutionary history from mtDNA data and that mtDNA on its own is an unsuitable marker for the study of recent historical events in arthropods. We also discuss the impact of these studies on the current programme of taxonomy based on DNA bar-coding.}, keywords = {barcoding, genetics, laupala, orthoptera}, doi = {10.1098/rspb.2005.3056}, url = {http://dx.doi.org/10.1098/rspb.2005.3056}, author = {Hurst, Gregory D. D. and Jiggins, Francis M.} } @article {Beckers2008Developmental, title = {Developmental plasticity of mating calls enables acoustic communication in diverse environments}, journal = {Proceedings of the Royal Society B: Biological Sciences}, volume = {275}, number = {1640}, year = {2008}, month = {June}, pages = {1243{\textendash}1248}, abstract = {10.1098/rspb.2007.1765 Male calls of the katydid exhibit substantial developmental plasticity in two parameters: (i) calls of winter males are continuous and lack the verse structure of summer calls and (ii) at equal temperatures, summer males produce calls with a substantially higher pulse rate than winter males. We raised female under conditions that reliably induced either summer or winter phenotype and tested their preferences for the call parameters that differ between summer and winter males. Neither generation was selective for the presence of verses, but females had strong preferences for pulse rates: only a narrow range of pulse rates was attractive. The attractive ranges did not differ between summer and winter females. Both male pulse rate and female preference for pulse rate changed with ambient temperature, but female preference changed more than the male calls. As a result, the summer call was attractive only at 25{\textdegree}C, whereas the slower winter call was attractive only at 20{\textdegree}C. Thus, developmental plasticity of male calls compensates for differences in temperature dependency between calls and preferences and enables the communication system to function in heterogeneous environments. The potential role of call plasticity during the invasion of new habitats is discussed.}, keywords = {bioacoustics, communication, na, orthoptera, plasticity, song, tettigoniidae}, doi = {10.1098/rspb.2007.1765}, url = {http://dx.doi.org/10.1098/rspb.2007.1765}, author = {Beckers, Oliver M. and Schul, Johannes} } @article {Chesmore2004Automated, title = {Automated identification of field-recorded songs of four British grasshoppers using bioacoustic signal recognition}, journal = {Bulletin of Entomological Research}, volume = {94}, number = {04}, year = {2004}, pages = {319{\textendash}330}, abstract = {Recognition of Orthoptera species by means of their song is widely used in field work but requires expertise. It is now possible to develop computer-based systems to achieve the same task with a number of advantages including continuous long term unattended operation and automatic species logging. The system described here achieves automated discrimination between different species by utilizing a novel time domain signal coding technique and an artificial neural network. The system has previously been shown to recognize 25 species of British Orthoptera with 99\% accuracy for good quality sounds. This paper tests the system on field recordings of four species of grasshopper in northern England in 2002 and shows that it is capable of not only correctly recognizing the target species under a range of acoustic conditions but also of recognizing other sounds such as birds and man-made sounds. Recognition accuracies for the four species of typically 70\&\#8211;100\% are obtained for field recordings with varying sound intensities and background signals.}, keywords = {acoustics, asr, bioacoustics, grasshoppers, identification, orthoptera, stridulation}, doi = {10.1079/BER2004306}, url = {http://dx.doi.org/10.1079/BER2004306}, author = {Chesmore, E. D. and Ohya, E.} } @article {Field1997Sound, title = {Sound production in primitive Orthoptera from Western Australia: sounds used in defence and social communication in Ametrus sp. and Hadrogryllacris sp. (Gryllacrididae: Orthoptera)}, journal = {Journal of Natural History}, volume = {31}, number = {7}, year = {1997}, pages = {1127{\textendash}1141}, publisher = {Taylor \& Francis}, abstract = {Sound production in two undescribed species of Gryllacrididae belonging to the genus Ametrus sp. and Hadrogryllacris sp. takes the form of defensive stridulation and intra-specific signalling by drumming on the substrate. Defensive stridulation is produced as part of an elaborate visual display, by femoro-tergal stridulation. Two rows of spines on abdominal tergites II and III of both species are rubbed by an elongate area of tubercules on the inner femoral surface of the hind legs. Analysis showed that the motion of the leg relative to the abdomen involves a complex counter-rotation of the leg between leg and abdomen. The defensive display may be performed in day light. Social signalling in both species occurs after dark, and involves drumming on the substrate by both hind legs in loose synchrony. Drumming is rhythmic and species{\textquoteright} specific. Males respond to playback calls and females duet with males. The evolution of this calling behaviour is discussed and comparisons are made with the other primitive ensiferan family known to produce both tergo-abdominal defensive stridulation and femoral drumming behaviour, the Stenopelmatidae.}, keywords = {communication, orthoptera, stridulation}, doi = {10.1080/00222939700770591}, url = {http://dx.doi.org/10.1080/00222939700770591}, author = {Field, L. H. and Bailey, W. J.} } @article {Riede1990Tympana, title = {Tympana, auditory thresholds, and projection areas of tympanal nerves in singing and silent grasshoppers (Insecta, Acridoidea)}, journal = {Zoomorphology}, volume = {109}, number = {4}, year = {1990}, month = {March}, pages = {223{\textendash}230}, keywords = {acrididae, grasshoppers, hearing, neuroanatomy, orthoptera, tympana}, issn = {0720-213X}, doi = {10.1007/BF00312473}, url = {http://dx.doi.org/10.1007/BF00312473}, author = {Riede, K. and K�mper, G. and H�fler, I.} } @article {GuerraFlight, title = {Flight behaviour attenuates the trade-off between flight capability and reproduction in a wing polymorphic cricket}, journal = {Biology Letters}, year = {Submitted}, abstract = {Flight-dimorphic insects have been used extensively to study trade-offs between energetically costly traits. Individuals may develop and maintain structures required for flight, or alternatively they may invest in reproduction. Previous experiments have not examined whether flight itself might affect investment into reproduction. As in other Gryllus species, flight-capable individuals of the wing polymorphic cricket, Gryllus texensis, incur an apparent reproductive penalty for being able to fly, expressed as smaller ovaries in females and lower courtship propensity in males, than their flight-incapable counterparts. We find that a short bout of flight eliminates the trade-off. Two days after the flight, the ovaries of flight-capable females were comparable with those of short-winged females. Similarly, flight markedly increased the probability of courtship behaviour. Our results suggest that the impact of the flight{\textendash}reproduction trade-off described in earlier studies may have been overestimated.}, keywords = {crickets, flight, orthoptera, polymorphism, wings}, doi = {10.1098/rsbl.2008.0570}, url = {http://dx.doi.org/10.1098/rsbl.2008.0570}, author = {Guerra, Patrick A. and Pollack, Gerald S.} } @article {WeissmanField, title = {The Field Cricket Gryllus assimilis and Two New Sister Species (Orthoptera: Gryllidae)}, journal = {Annals of the Entomological Society of America}, volume = {102}, number = {3}, year = {Submitted}, pages = {367{\textendash}380}, publisher = {Entomological Society of America}, keywords = {crickets, orthoptera, taxonomy}, issn = {0013-8746}, url = {http://www.ingentaconnect.com/content/esa/aesa/2009/00000102/00000003/art00004}, author = {Weissman, David B. and Walker, Thomas J. and Gray, David A.} } @article {Hofstede_2009_gleaning, title = {Gleaning bat echolocation calls do not elicit antipredator behaviour in the Pacific field cricket, Teleogryllus oceanicus (Orthoptera: Gryllidae)}, journal = {Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology}, volume = {195}, number = {8}, year = {2009}, month = {August}, pages = {769{\textendash}776}, abstract = {Abstract\ \ Bats that glean prey (capture them from surfaces) produce relatively inconspicuous echolocation calls compared to aerially foraging bats and could therefore be difficult predators to detect, even for insects with ultrasound sensitive ears. In the cricket Teleogryllus oceanicus, an auditory interneuron (AN2) responsive to ultrasound is known to elicit turning behaviour, but only when the cricket is in flight. Turning would not save a cricket from a gleaning bat so we tested the hypothesis that AN2 elicits more appropriate antipredator behaviours when crickets are on the ground. The echolocation calls of Nyctophilus geoffroyi, a sympatric gleaning bat, were broadcast to singing male and walking female T. oceanicus. Males did not cease singing and females did not pause walking more than usual in response to the bat calls up to intensities of 82\ dB peSPL. Extracellular recordings from the cervical connective revealed that the echolocation calls elicited AN2 action potentials at high firing rates, indicating that the crickets could hear these stimuli. AN2 appears to elicit antipredator behaviour only in flight, and we discuss possible reasons for this context-dependent function.}, keywords = {behaviour, crickets, escape, orthoptera}, doi = {10.1007/s00359-009-0454-3}, url = {http://dx.doi.org/10.1007/s00359-009-0454-3}, author = {Hofstede, Hannah T. and Killow, Joanne and Fullard, James} } @article {Brouwers2009Influence, title = {The influence of barriers and orientation on the dispersal ability of wood cricket (Nemobius sylvestris) (Orthoptera: Gryllidae)}, journal = {Journal of Insect Conservation}, year = {2009}, month = {December}, abstract = {Abstract\ \ Dispersal is an important process determining species spread and survival in fragmented landscapes. However, information on the dispersal ability of woodland-associated invertebrate species is severely lacking. A study was conducted examining the ability of wood cricket (Nemobius sylvestris) (Orthoptera: Gryllidae) to cross small watercourses and to orientate themselves towards habitat edges. A series of experiments were conducted where juvenile (i.e. nymph) and adult wood crickets were released and observed over time. The results of this investigation indicated that (i) nymphs and adults were equally able to swim across a small (<=35\ cm) watercourse; and (ii) adult wood cricket were able to positively orientate themselves towards a mature woodland edge at a visual angle of >=19{\textdegree}, when less than 50\ m away. Together, this investigation suggests that these traits likely facilitate the ability of this species to disperse within fragmented wooded landscapes, however, further study is needed to strengthen the significance of these findings for this and similar species.}, keywords = {orientation, orthoptera}, issn = {1366-638X}, doi = {10.1007/s10841-009-9256-8}, url = {http://dx.doi.org/10.1007/s10841-009-9256-8}, author = {Brouwers, Niels and Newton, Adrian} } @article {CorderoNew, title = {New data on the {\textquotedblright} silver-bell cricket{\textquotedblright} (Orthoptera, Gryllidae), a forgotten and overlooked cricket subject to a high risk of extinction in western Europe}, journal = {Graellsia}, volume = {64}, number = {2}, year = {Submitted}, pages = {171{\textendash}180}, keywords = {2010, crickets, europe, fauna, iucn, orthoptera, redlist}, issn = {1989-953X}, doi = {10.3989/graellsia.2008.v64.i2.30}, url = {http://dx.doi.org/10.3989/graellsia.2008.v64.i2.30}, author = {Cordero, P. J. and Llorente, V.} } @article {Guerra2005Male, title = {Male competition and aggregative behaviour are mediated by acoustic cues within a temporally unstructured aggregation}, journal = {Behaviour}, year = {2005}, pages = {71{\textendash}90}, publisher = {BRILL}, abstract = {We investigated the dynamics of temporally unstructured acoustic signalling aggregations, where direct interactions among males appear to be absent. The short-winged meadow katydid, Conocephalus brevipennis Scudder (Orthoptera: Tettigoniidae), is a species whose males form dense, aphasic singing aggregations. By studying both phonotactic responses and male calling behaviour towards conspecific, heterospecific, and aggregate signals (combined songs of many individuals), we examined how males might respond to acoustic signals within such aggregations, and whether such apparently unstructured groups do in fact possess spatial or temporal structure. Phonotactic bioassays demonstrate that males and females are attracted to conspecific and aggregate, but not heterospecific song. When given a choice between individual conspecific and aggregate song, females prefer conspecific song, whereas males preferred aggregate song, but only if it was presented at a lower relative intensity than the individual song. Response to aggregate song also depended on male size\&\#8212;the largest males approached the broadcast speaker more closely than smaller males. Experiments examining male calling behaviour show that they respond differently to playback of conspecific song, as compared to heterospecific and aggregate signals. For heterospecific and aggregate song, males decrease their singing rate, but recover after playback ceases. Playback of conspecific song resulted in a decrease in singing that persisted after the end of playback when males were initially weak singers, but little effect for males that were initially strong singers. Males also varied the number of species-specific {\textquoteright}tick{\textquoteright} elements they included in songs. Weaker singers reduced the number of ticks per song in response to playback. Stronger singers increased tick rates for conspecific and heterospecific playback, but decreased during aggregate song playback. Our results demonstrate that calling song, in addition to attracting females, may be used by males to facilitate aggregation and mediate the segregation of large and small signallers. Males also compete acoustically with one another by varying their overall singing rate and the frequency of tick elements relative to competing signallers.}, keywords = {aggregations, chorussing, katydids, orthoptera}, issn = {0005-7959}, doi = {10.1163/1568539053627730}, url = {http://dx.doi.org/10.1163/1568539053627730}, author = {Guerra, Patrick A. and Mason, Andrew C.} } @inbook {Robinson2002Sound, title = {Sound signalling in orthoptera}, booktitle = {Advances in Insect Physiology Volume 29}, series = {Advances in Insect Physiology}, volume = {29}, year = {2002}, pages = {151{\textendash}278}, publisher = {Elsevier}, organization = {Elsevier}, keywords = {bioacoustics, communication, orthoptera, review}, isbn = {978-0-12-024229-0}, issn = {00652806}, doi = {10.1016/S0065-2806(02)29003-7}, url = {http://dx.doi.org/10.1016/S0065-2806(02)29003-7}, author = {Robinson, D. and Hall, M.} } @article {Neuhofer2008Evolutionarily, title = {Evolutionarily conserved coding properties of auditory neurons across grasshopper species}, journal = {Proceedings of the Royal Society B: Biological Sciences}, volume = {275}, number = {1646}, year = {2008}, month = {September}, pages = {1965{\textendash}1974}, abstract = {10.1098/rspb.2008.0527 We investigated encoding properties of identified auditory interneurons in two not closely related grasshopper species (Acrididae). The neurons can be homologized on the basis of their similar morphologies and physiologies. As test stimuli, we used the species-specific stridulation signals of , which evidently are not relevant for the other species, . We recorded spike trains produced in response to these signals from several neuron types at the first levels of the auditory pathway in both species. Using a spike train metric to quantify differences between neuronal responses, we found a high similarity in the responses of homologous neurons: interspecific differences between the responses of homologous neurons in the two species were not significantly larger than intraspecific differences (between several specimens of a neuron in one species). These results suggest that the elements of the thoracic auditory pathway have been strongly conserved during the evolutionary divergence of these species. According to the {\textquoteright}efficient coding{\textquoteright} hypothesis, an adaptation of the thoracic auditory pathway to the specific needs of acoustic communication could be expected. We conclude that there must have been stabilizing selective forces at work that conserved coding characteristics and prevented such an adaptation.}, keywords = {acrididae, bioacoustics, communication, grasshoppers, interneurons, neurons, orthoptera}, issn = {0962-8452}, doi = {10.1098/rspb.2008.0527}, url = {http://dx.doi.org/10.1098/rspb.2008.0527}, author = {Neuhofer, Daniela and Wohlgemuth, Sandra and Stumpner, Andreas and Ronacher, Bernhard} } @article {Kenyeres2009Endemism, title = {Endemism hot spots, core areas and disjunctions in European Orthoptera}, journal = {Acta Zoologica Cracoviensia - Series B: Invertebrata}, year = {2009}, month = {June}, pages = {189{\textendash}211}, publisher = {Institute of Systematics and Evolution of Animals, Polish Academy of Sciences}, abstract = {The paper overviews the endemism hot-spots of the European Orthoptera and reveals the paleogeographic processes which have shaped the recent faunal structures of the European Orthoptera fauna. Descriptions of seven endemism centres (the southern Balkan Peninsula and western Asia Minor; the Dinaric Mountains; the Alps; the Appenines; the Carpathian Mountains and the Carpathian Basin; the Iberian Peninsula; the Caucasian Mountains) are given. Significance of these areas is not only mirrored in the richness of endemic Orthoptera species but also in the postglacial expansion processes of the European Orthoptera fauna. The aims of the study were to summarize the literature data and hypotheses of the topic, and to discuss formation and evolution of endemism centres and endemic species of European Orthoptera.}, keywords = {conservation, endemism, orthoptera, redlist}, issn = {1895-3131}, doi = {10.3409/azc.52b\_1-2.189-211}, url = {http://dx.doi.org/10.3409/azc.52b\_1-2.189-211}, author = {Kenyeres, Zoltan and Racz, Istvan A. and Varga, Zoltan} }