4.1 Article

Evidence for embryo-embryo interactions in controlling hatching time and synchronization in the brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae)

期刊

ENTOMOLOGICAL SCIENCE
卷 23, 期 4, 页码 430-444

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WILEY
DOI: 10.1111/ens.12439

关键词

hatching synchrony; substrate; vibration

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The mechanisms controlling egg diapause and circadian rhythms of hatching activity have been extensively studied in insects. However, relatively little attention has been paid to the mechanisms controlling synchronized hatching from an egg mass. In this study, we examined the possible involvement of embryo-embryo interaction in controlling hatching time in Halyomorpha halys (Stal). Eggs tended to hatch earlier as the egg mass size increased. Egg separation and clumping of separated eggs at various times showed that hatching synchrony was largely determined shortly before hatching. However, whether eggs were kept in a mass or separated until several hours before hatching also influenced the hatching time, indicating the presence of embryo-embryo interactions. Eggs derived from different masses and kept in physical contact with one another hatched synchronously if their ages were within approximately 8 h. In this case, both younger and older eggs advanced only in hatching time, in contrast to a case of locusts reported by others. Eggs separated by more than 7 mm hatched as synchronously as those kept in a mass when glued to the same substrate, suggesting an important role of the egg substrate in transmitting the vibrational hatching signals to neighboring sibling eggs to synchronize hatching.

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