02861nas a2200277 4500008004100000022001300041245010200054210006900156260001600225300001400241490000600255520200300261653003302264653001702297653003102314653001202345653001702357653001102374100002302385700001402408700002502422700002702447700002102474700002202495856006602517 2016 eng d a2351989400aLarge-scale semi-automated acoustic monitoring allows to detect temporal decline of bush-crickets0 aLargescale semiautomated acoustic monitoring allows to detect te cJan-04-2016 a208 - 2180 v63 a

Monitoring biodiversity over large spatial and temporal scales is crucial to assess the impact of global changes and environmental mitigation measures. However, large-scale monitoring of invertebrates remains poorly developed despite the importance of these organisms in ecosystem functioning. The development of new recording techniques and new methods of automatic species recognition based on sound detection and easily applicable within a citizen-science framework, offers interesting possibilities. However, the value of such protocols has not been tested for the study of temporal trends on a large spatial scale.

We used an acoustic region-wide citizen-monitoring program of Orthoptera, conducted along roads, to assess the relevance of automatic species recognition methods to detect temporal trends while taking into account spatial and seasonal patterns of two Orthoptera species activity (Tettigonia viridissima Linnaeus, 1758, and Ruspolia nitidula Scopoli, 1786) at a large scale. Additionally, we tested the effect of climate and land-use variables on spatio-temporal abundance patterns using generalized linear mixed models. We found negative temporal trends for the two species across the survey period (2006–2012). The spatial variations were largely explained by the geoclimatic conditions and, to a lesser extent, by land use (negative effects of urbanization). The temporal variations were highly correlated to the climatic conditions of the year, and of the previous year (nonlinear effect of temperature, precipitation).

To our knowledge, this paper describes the first successful attempt to calculate large-scale temporal trends of insect populations on the basis of an automatic identification process of acoustic data. We argue that acoustic monitoring along roads, coupled with the automatic recognition of species sounds, offers several advantages for assessing Orthoptera biodiversity response to global changes and environmental measures.

10aautomated signal recognition10abioacoustics10acitizen monitoring program10aClimate10aTettigoniida10atrends1 aJeliazkov, Alienor1 aBas, Yves1 aKerbiriou, Christian1 aJulien, Jean-François1 aPenone, Caterina1 aLe Viol, Isabelle uhttp://linkinghub.elsevier.com/retrieve/pii/S235198941530032900704nas a2200121 4500008004100000245011500041210006900156300001200225490000700237520027300244100002400517856004100541 1976 eng d00aSpecies isolation and song types of the genus Ruspolia Schulthess (Orthoptera Tettigonioidea) in Uganda0 aSpecies isolation and song types of the genus iRuspoliai Schulth a511-5280 v103 a

An account is given of the songs of six speciesof the tettigoniid Ruspolia Schulthess occurring in Uganda. Some comment is made on their biology and distribution. Particular emphasis is made of the song as an isolating mechanism in sympatric species.

1 aBailey, Winston, J. uhttps://bio.acousti.ca/de/node/1726100470nas a2200121 4500008004100000245013200041210006900173300001200242490000700254100002400261700002200285856004100307 1978 eng d00aThe general biology and phenology of swarming in the East African tettigoniid Ruspolia differens (Serville) (Orthoptera)0 ageneral biology and phenology of swarming in the East African te a259-2880 v121 aBailey, Winston, J.1 aMcCrae, A., W. R. uhttps://bio.acousti.ca/de/node/1726001470nas a2200145 4500008004100000022001400041245009600055210006900151260001600220300001400236490000800250520098900258100002401247856005301271 1967 eng d a0028-083600aFurther Investigations into the Function of the “Mirror” in Tettigonioidea (Orthoptera)0 aFurther Investigations into the Function of the Mirror in Tettig cDec-08-1967 a762 - 7630 v2153 a

From the calculations of Pierce nearly two decades ago, students of the production of sound in bush crickets have assumed the area of thin cuticle on the right tegmen known as the “mirror” to be acoustically important (Fig. 1). Pierce's attribution of a resonant function to this membrane was challenged by Broughton and Dumortier. Dumortier suggested that the whole tegmen is responsible as an acoustic coupler, not only the mirror. Broughton, working on the decticine, Metrioptera roeselii (Hagenbach), found that the frequency spectrum of one individual was not obligatorily changed by coating the mirror with a deadening film of latex. His results have stimulated further work of the same nature on two members of the Conocephalidae, Conocephalus discolor (Thunberg) and Homorocoryphus nitidulus nitidulus (Scopoli). Both these animals, like M. roeselii, have a well-defined spectrum, but their peak frequencies are at 28 kc/s and 15.5 kc/s, respectively.

1 aBailey, Winston, J. uhttp://www.nature.com/doifinder/10.1038/215762a001313nas a2200157 4500008004100000022001300041245010000054210006900154260001600223300001400239490000700253520078500260100002401045700002001069856006601089 1971 eng d a0003347200aSong as a possible isolating mechanism in the genus Homorocoryphus (Tettigonioidea, Orthoptera)0 aSong as a possible isolating mechanism in the genus Homorocoryph cJan-05-1971 a390 - 3970 v193 a

The songs of four species of the genus Homorocoryphus have been recorded in the field in the central region of Uganda. The songs differed in their syllable repetition rates. The effect of artificially produced songs, bearing a close resemblance to the natural song but with a variable repetition rate, has been tested on the activity levels of virgin females of two of the species. It was found that the females responded to the species specific repetition rate. Songs of each of the four species were tested against females of the species H. flavovirens, where a species specific response was established. The implications of the syllable repetition rate and the carrier frequency in this genus was discussed and a possible role in reproductive isolation was postulated.

1 aBailey, Winston, J.1 aRobinson, David uhttp://linkinghub.elsevier.com/retrieve/pii/S000334727180022200732nas a2200145 4500008004100000022001400041245006200055210005700117260000900174300000900183490000600192520030000198100001700498856007100515 1971 eng d a0040-816600aThe stridulatory apparatus of two species of Tettigoniid.0 astridulatory apparatus of two species of Tettigoniid c1971 a71-60 v33 a

A scanning electron microscopical examination has been made of the stridulatory apparatus of Homorocoryphus nitidulus vicinus (Wlk.) and Jamaiciana flava (Wlk.). Its structure is discussed in relation to function, and the probable affinities of the two species within the Tettigoniidae.

1 aAnstee, J, H uhttp://www.sciencedirect.com/science/article/pii/S004081667180032000401nas a2200109 4500008004100000245009700041210006900138300001200207490000700219100002400226856004100250 1975 eng d00aA review of the African Species of the genus Ruspolia Schulthess [Orthoptera Tettigonioidea]0 areview of the African Species of the genus Ruspolia Schulthess O a171-2260 v371 aBailey, Winston, J. uhttps://bio.acousti.ca/de/node/16408