01634nas a2200109 4500008004100000245012700041210006900168520107300237100001901310700001301329856018201342 2004 eng d00aAutomated identification of field-recorded songs of four British grasshoppers using bioacoustic signal recognitionAbstract0 aAutomated identification of fieldrecorded songs of four British 3 a

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 70–100% are obtained for field recordings with varying sound intensities and background signals.

1 aChesmore, E.D.1 aOhya, E. uhttps://www.cambridge.org/core/product/identifier/S0007485304000331/type/journal_articlehttps://www.cambridge.org/core/services/aop-cambridge-core/content/view/S000748530400033100376nas a2200109 4500008004100000245007300041210006900114300001400183490000700197100002100204856004100225 1952 eng d00aEcological studies on solitary Acrididae in England and South Africa0 aEcological studies on solitary Acrididae in England and South Af a165–2030 v151 aChapman, Kenneth uhttps://bio.acousti.ca/nn/node/5071201511nas a2200133 4500008004100000245015500041210006900196300001000265490000800275520101100283100001801294700002401312856004101336 2009 eng d00aA re-examination of the taxonomy of the Chorthippus albomarginatus group in Europe on the basis of song and morphology (Orthoptera: Acrididae).0 areexamination of the taxonomy of the iChorthippus albomarginatus a65-970 v1523 a

A study of European sibling species of the Chorthippus albomarginatus group shows that the males could be well distinguished on the basis of the number and density of the stridulatory pegs. We recorded and analysed the calling and courtship songs of the males, as well as the stridulatory movements of the hind legs. Analysis of the stridulatory leg movements allowed us to reveal more differences between both the courtship songs and the calling songs of the European species of this group. On the basis of the morphology, calling and courtship song analysis, we describe a new species, Ch. ferdinandi sp. n., from Greece (Peloponnesus) and a new subspecies, Ch. oschei pusztaensis ssp. n., from the Balkans, Hungary, Moldova and Ukraine. Ch. bruttius Fontana & La Greca, 1999 is classified as a subspecies of Ch. karelini. We describe the phylogenetic relations between the European species of the Ch. albomarginatus group based on the courtship song complexity and courtship visual display.

1 aVedenina, YU.1 avon Helversen, Otto uhttps://bio.acousti.ca/nn/node/5052402168nas a2200169 4500008004100000022001400041245016600055210006900221260001600290300001400306490000700320520155800327100001801885700002101903700002401924856005001948 2007 eng d a1010-061X00aThe unusual inheritance pattern of the courtship songs in closely related grasshopper species of the Chorthippus albomarginatus-group (Orthoptera: Gomphocerinae)0 aunusual inheritance pattern of the courtship songs in closely re cJan-01-2007 a260 - 2770 v203 aSibling 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.1 aVedenina, YU.1 aPanyutin, A., K.1 avon Helversen, Otto uhttp://www.blackwell-synergy.com/toc/jeb/20/1