Embryo-to-embryo communication facilitates synchronous hatching in grasshoppers

Synchronous hatching within single egg clutches is moderately common in locusts and other insects can be mediated by vibrational stimuli generated adjacent embryos. However, non-locust grasshoppers, there has been little research on the patterns of mechanisms controlling time hatching. In this study, six grasshoppers ( Atractomorpha lata , Oxya yezoensis Acrida cinerea Chorthippus biguttulus Gastrimargus marmoratus Oedaleus infernalis ) were observed under various laboratory treatments. Under continuous illumination a 25/30°C thermocycle, eggs these tended to hatch during first half daily warm period. Eggs removed from pods cultured at 30°C significantly earlier more synchronously when kept groups vs. singly. general, hatched group size was increased. Egg stimulated nymphs some species, but not others. all two separated several millimeters sand less than those contact with one another, synchrony similarly restored if they connected piece wire, suggesting that physical signal transmitted through wire facilitated synchronized contrast, times Emma field cricket, Teleogryllus emma which lays single, isolated eggs, influenced artificial clumping experiments. These results are discussed compared characteristics insects.