01022nas a2200109 4500008004100000245013600041210006900177260003000246520057000276100002500846856004100871 1987 eng d00aFactors in the reproductive isolation between Dociostaurus curvicercus, D. jagoi jagoi and D. genei littoralis0 aFactors in the reproductive isolation between iDociostaurus curv aChichesterbEllis Horwood3 a

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.

1 aBlondheim, Syril, A. uhttps://bio.acousti.ca/sv/node/1725601816nas a2200121 4500008004100000245015000041210006900191300001000260490000700270520135100277100002501628856004101653 1972 eng d00aAcoustic Communication and Differences in the Biology of Two Sibling Species of Grasshoppers, Acrotylus insubricus and A. patruelis0 aAcoustic Communication and Differences in the Biology of Two Sib a17-240 v653 a

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.

1 aBlondheim, Syril, A. uhttps://bio.acousti.ca/sv/node/1725500479nas a2200145 4500008004100000022001400041245007000055210006100125260001600186300001400202490000700216100002500223700002500248856006000273 1983 eng d a0033-261500a‘Protest’ Sounds of a Grasshopper: Predator-Deterrent Signal?0 aProtest Sounds of a Grasshopper PredatorDeterrent Signal cJan-01-1983 a387 - 3940 v901 aBlondheim, Syril, A.1 aFrankenberg, Eliezer uhttp://www.hindawi.com/journals/psyche/1983/098675/abs/