Effects of embryonic responses to clutch mates on egg hatching patterns of<scp>P</scp>entatomidae (<scp>H</scp>eteroptera)

Endo, Jun; Numata, Hideharu

doi:10.1111/phen.12219

Cited by 10 publications

(30 citation statements)

References 28 publications

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“…However, the eggs that are individually separated hatch later and over a longer period than those in a pod (Tanaka, 2017). Similar phenomena are reported for several other species including true bugs (Kiritani, 1964;Endo & Numata, 2017) and another locust, S. gregaria (Nishide & Tanaka, 2016). However, the mechanisms underlying synchronous hatching are unexplored in insects.…”

Section: Discussionsupporting

confidence: 65%

“…Synchronous hatching has various advantages for animals laying batches of eggs, including the shortening of the time interval in which hatchlings as a group can be attacked by predators, swamping predators on emergence, reduction of egg cannibalism among siblings, helping hatchlings to escape from the ootheca or in forming an aggregation and enabling hatchlings to start feeding as a group (Morimoto & Sato, 1962;Provine, 1976Provine, , 1977Provine, , 1981Arnold & Wassersug, 1978;Dehn, 1990;Warkentin et al, 2006;Nishide & Tanaka, 2016;Endo & Numata, 2017;Endo et al, 2019). Synchronous hatching is well researched and is reported in both vertebrates and invertebrates (Spencer et al, 2001;Saigusa, 2002;Ikeda et al, 2006;Vergne & Mathevon, 2008;Webster et al, 2015;Aubret et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Identification of vibrational signals emitted by embryos of the migratory locust Locusta migratoria (Orthoptera: Acrididae) that induce synchronous hatching

Sakamoto¹,

Tanaka²,

Hata³

2019

Eur. J. Entomol.

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Eggs of the migratory locust, Locusta migratoria (Orthoptera: Acrididae), hatch synchronously when in a pod, but only sporadically when kept separately. Here, we aimed to detect the vibrational stimuli emitted by eggs that initiate synchronous hatching. First, we recorded the vibrations emitted by an egg pod and single eggs. One bout of vibrations consisted of 2 to 46 vibrations. The total number and amplitude of vibrations in single eggs increased as the time to hatch decreased. Eggs kept separately were continuously subjected during the last 2 days before hatching to recordings of vibrations from a single egg. Recordings made during the last 2.5 h before hatching caused these eggs to hatch signifi cantly earlier than those not subjected to this treatment, the control. In contrast, eggs subjected to recordings made 8 to 10 h before hatching signifi cantly delayed their hatching relative to the controls, which indicates that synchronous hatching of eggs is induced by age-dependent changes in vibrations from neighbouring eggs. Exposure to one large bout of vibrations (consisting of 40 vibrations in 101 s) was suffi cient to induce synchronous hatching in eggs kept separately when applied 5 h before hatching, but not 36 or 11.5 h before hatching. Visual inspection of the spectra indicated that the vibrations had two peaks at about 100 Hz and 1.5 kHz. Only exposure to the latter altered the hatching time of eggs. The embryo moved the posterior part of its abdomen when emitting the vibrations. These results indicate that the synchronous hatching of locust eggs is induced when the embryos emit particular vibrations.

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Section: Discussionsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Identification of vibrational signals emitted by embryos of the migratory locust Locusta migratoria (Orthoptera: Acrididae) that induce synchronous hatching

Sakamoto¹,

Tanaka²,

Hata³

2019

Eur. J. Entomol.

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“…We first examined whether embryos of Halyomorpha halys synchronize hatching by responding to mechanical cues that are transmitted from the siblings. In several stink bugs of Pentatomidae (Heteroptera) including H. halys, previous studies have proposed that the use of this type of cue facilitates synchronized hatching of an egg clutch, which is laid on a plant surface, typically on a leaf [14][15][16]. In Pentatomidae, eggs in a clutch are attached to each other with hardened maternal secretions [17], and therefore vibrations or other mechanical forces exerted by siblings can probably spread to nearby eggs.…”

Section: The Type Of Hatching Cuementioning

confidence: 99%

“…All eggs in a clutch of H. halys complete embryonic development in 5-6 d and, even without the synchronization cues, hatch within 4 h at 25°C [14]. In this species, it is probable that hatching is synchronized as follows: Earlier-hatching eggs among a clutch generate a specific vibrational cue during the hatching behavior, and this cue immediately induces hatching of later-hatching eggs at a stage shortly before spontaneous hatching.…”

Section: Vibration Generated By Egg Shell Crackingmentioning

confidence: 99%

“…We hypothesize that the vibrational cue is generated by cracking open the egg shell. Egg shell-cracking by siblings has been regarded as one of the possible movements that generates vibrational or acoustic cues for synchronizing hatching in some turtles and insects [10,12,14,18]. In the present study, we used pairs of two adjacent eggs that remained attached and were fixed on a piece of drawing paper, and recorded the vibration transmitted from the first-hatched egg to the adjacent egg when the shell of the former cracked, using a laser Doppler vibrometer (Figure 2A).…”

Section: Vibration Generated By Egg Shell Crackingmentioning

confidence: 99%

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Egg Cracking Vibration as a Cue for Stink Bug Siblings to Synchronize Hatching

et al. 2018

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Egg clutches of many animals hatch synchronously due to parental control [1, 2] or environmental stimulation [3, 4]. In contrast, in some animals, embryos actively synchronize their hatching timing with their siblings for facilitating adaptive behavior in sibling groups, such as mass migration [5, 6]. These embryos require synchronization cues that are detectable from eggs and indicative of when the siblings hatch, for example, pre-hatching vocalizations in birds and crocodiles [7, 8]. Previous studies, using methods including artificial presentation of non-specific mechanical stimuli, demonstrated that vibrations or other mechanical forces caused by sibling movements are cues used by some turtles and insects [9-13]. However, there is no evidence about which movements of tiny embryos or hatchlings, among multiple possibilities, can generate mechanical 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 egg shells. An egg-cracking vibration seems to be transmitted to distant eggs within a clutch and still maintain its function as a cue, thus leading to the highly synchronized hatching pattern previously reported [14]. In this species, 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 illustrates the diversity of social information use by animal embryos for success in the sibling group.

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