02351nas a2200181 4500008004100000022001300041245008300054210006900137260001600206300001700222490000700239520161500246100001401861700002201875700001801897700002101915856023301936 2019 eng d a0960982200aEgg-Cracking Vibration as a Cue for Stink Bug Siblings to Synchronize Hatching0 aEggCracking Vibration as a Cue for Stink Bug Siblings to Synchro cJan-01-2019 a143 - 148.e20 v293 a
Egg clutches of many animals hatch synchronously due to parental control [1, 2] or environmental stimu- lation [3, 4]. In contrast, in some animals, embryos actively synchronize their hatching timing with their siblings to facilitate adaptive behavior in sibling groups, such as mass migration [5, 6]. These em- bryos require synchronization cues that are detect- able from eggs and indicative of when the siblings hatch, such as pre-hatching vocalizations in birds and crocodiles [7, 8]. Previous studies, using methods including artificial presentation of non-spe- cific mechanical stimuli, demonstrated that vibra- tions or other mechanical forces caused by sibling movements are cues used by some turtles and in- sects [9–13]. However, there is no evidence about which movements of tiny embryos or hatchlings, among multiple possibilities, can generate mechani- cal cues actually detectable through eggs. Here, we show that embryos of the brown marmorated stink bug, Halyomorpha halys, synchronize hatching by responding to single pulsed vibrations generated when siblings crack open their eggshells. An egg- cracking vibration seems to be transmitted to distant eggs within a clutch while still maintaining its func- tion as a cue, thus leading to the highly synchronized hatching pattern previously reported [14]. In this spe- cies, it is possible that embryos attempt to hatch with short lags after earlier-hatched siblings to avoid egg cannibalism by them [14]. The present study illus- trates the diversity of social-information use by ani- mal embryos for success in the sibling group.
1 aEndo, Jun1 aTakanashi, Takuma1 aMukai, Hiromi1 aNumata, Hideharu uhttps://linkinghub.elsevier.com/retrieve/pii/S0960982218314908https://api.elsevier.com/content/article/PII:S0960982218314908?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S0960982218314908?httpAccept=text/plain