@inbook {17256, title = {Factors in the reproductive isolation between Dociostaurus curvicercus, D. jagoi jagoi and D. genei littoralis}, booktitle = {Evolutionary Biology of Orthopteroid Insects}, year = {1987}, publisher = {Ellis Horwood}, organization = {Ellis Horwood}, chapter = {4}, address = {Chichester}, abstract = {

From a well-documented study of two sympatric sibling species of singing gomphocerine grasshoppers, Perdeck (1958) reached the surprisng conclusion that reproductive isolation between them resulted almost exclusively from differences in acustic behavior. In the present work, comparison of the sibling gomphocerine grasshoppers D. curvicercus, D. jagoi jagoi and D. genei littoralis revealed ecographical, temporal, ethological, structural and cytological differences which could account for failure of the species to interbreed.

}, author = {Blondheim, Syril A.} } @article {17255, title = {Acoustic Communication and Differences in the Biology of Two Sibling Species of Grasshoppers, Acrotylus insubricus and A. patruelis}, journal = {Annals of the Entomological Society of America}, volume = {65}, year = {1972}, pages = {17-24}, chapter = {17}, abstract = {

In Israel, sexually mature adults of the sibling species of grashoppers Acrotylus insubricus (Scopoli) and A. patruelis (Herrich-Shaffer) occur both allopatrically and sympatrically. To distinguish between the 2 species in areas of sympatry and to help resolve their confused taxonomy, nonmorphological criteria were sought. The mating and acoustic behavior of these species and some aspects of their biology were therefore studies.

No species-specific differences in mating or acoustic behaviour were found. Stridulatory songs of the 2 species were similar for all parameters studied, as was substrate drumming, studied both as airborne sound and solidborne sound (i.e., substrate vibrations). No response to playback of either form of sound, or of substrate vibrations as such, was obtained under the conditions of our experiments.

Under identical conditions of incubation, eggs of A. patreulis hatched in a significantly hsorter time than those of A. insubricus, and gave rise to uniformly grey nymphs differing from the black-headed, light-bodied nymphs of the latter species. Under \"no-choice\" laboratory conditions, F1 hybrids were obtained from each of teh reciprocal parental crosses. Songs of hybrid males could not be distinguished from those of the parent species.

}, author = {Blondheim, Syril A.} } @article {17217, title = {{\textquoteleft}Protest{\textquoteright} Sounds of a Grasshopper: Predator-Deterrent Signal?}, journal = {Psyche: A Journal of Entomology}, volume = {90}, year = {1983}, month = {Jan-01-1983}, pages = {387 - 394}, issn = {0033-2615}, doi = {10.1155/1983/98675}, url = {http://www.hindawi.com/journals/psyche/1983/098675/abs/}, author = {Blondheim, Syril A. and Frankenberg, Eliezer} }