@article {47341, title = {Large-scale semi-automated acoustic monitoring allows to detect temporal decline of bush-crickets}, journal = {Global Ecology and Conservation}, volume = {6}, year = {2016}, month = {Jan-04-2016}, pages = {208 - 218}, abstract = {

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.

}, keywords = {automated signal recognition, bioacoustics, citizen monitoring program, Climate, Tettigoniida, trends}, issn = {23519894}, doi = {10.1016/j.gecco.2016.02.008}, url = {http://linkinghub.elsevier.com/retrieve/pii/S2351989415300329}, author = {Jeliazkov, Alienor and Bas, Yves and Kerbiriou, Christian and Julien, Jean-Fran{\c c}ois and Penone, Caterina and Le Viol, Isabelle} } @article {17261, title = {Species isolation and song types of the genus Ruspolia Schulthess (Orthoptera Tettigonioidea) in Uganda}, journal = {Journal of Natural History}, volume = {10}, year = {1976}, pages = {511-528}, chapter = {511}, abstract = {

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.

}, author = {Winston J. Bailey} } @article {17260, title = {The general biology and phenology of swarming in the East African tettigoniid Ruspolia differens (Serville) (Orthoptera)}, journal = {J. nat. Hist.}, volume = {12}, year = {1978}, pages = {259-288}, chapter = {259}, author = {Winston J. Bailey and A. W. R. McCrae} } @article {17252, title = {Further Investigations into the Function of the {\textquotedblleft}Mirror{\textquotedblright} in Tettigonioidea (Orthoptera)}, journal = {Nature}, volume = {215}, year = {1967}, month = {Dec-08-1967}, pages = {762 - 763}, abstract = {

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\&$\#$39;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.

}, issn = {0028-0836}, doi = {10.1038/215762a0}, url = {http://www.nature.com/doifinder/10.1038/215762a0}, author = {Winston J. Bailey} } @article {17235, title = {Song as a possible isolating mechanism in the genus Homorocoryphus (Tettigonioidea, Orthoptera)}, journal = {Animal Behaviour}, volume = {19}, year = {1971}, month = {Jan-05-1971}, pages = {390 - 397}, abstract = {

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.

}, issn = {00033472}, doi = {10.1016/S0003-3472(71)80022-2}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0003347271800222}, author = {Winston J. Bailey and Robinson, David} } @article {17223, title = {The stridulatory apparatus of two species of Tettigoniid.}, journal = {Tissue Cell}, volume = {3}, year = {1971}, month = {1971}, pages = {71-6}, abstract = {

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.

}, issn = {0040-8166}, doi = {10.1016/S0040-8166(71)80032-0}, url = {http://www.sciencedirect.com/science/article/pii/S0040816671800320}, author = {Anstee, J H} } @article {16408, title = {A review of the African Species of the genus Ruspolia Schulthess [Orthoptera Tettigonioidea]}, journal = {Bulletin de l{\textquoteright}I.F.A.N. Ser. A.}, volume = {37}, year = {1975}, pages = {171-226}, chapter = {171}, author = {Winston J. Bailey} }