Hatching synchrony is controlled by a two-step mechanism in the migratory locust Locusta migratoria (Acrididae: Orthoptera): Roles of vibrational stimuli

Tanaka, Seiji; Sakamoto, Hironori; Hata, Tamako; Sugahara, Ryohei

doi:10.1016/j.jinsphys.2018.03.010

Cited by 30 publications

(26 citation statements)

References 21 publications

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“…Interestingly, separated eggs vibrationally stimulated by Mozart piano music hatch more rapidly than those that are not (Tanaka et al, 2018). In this case, however, synchronous hatching is observed only when the music started shortly before hatching, indicating that the embryo becomes ready to respond to such stimuli but hatch only after reaching a certain stage, which is called the standby stage (Tanaka et al, 2018).…”

Section: Methods Of Recording the Vibrations Emitted By Eggsmentioning

confidence: 88%

“…Eggs kept in contact with other eggs killed by freezing shortly before hatching, hatch asynchronously, which provides no evidence for the involvement of chemical stimuli in controlling synchronous hatching (Tanaka et al, 2018). In contrast, separated eggs can hatch as synchronously as those kept in contact with one another when they are connected by a piece of metal wire, which indicates that synchronous hatching may be controlled by a vibrational stimulus produced by the embryos (Tanaka et al, 2018). Interestingly, separated eggs vibrationally stimulated by Mozart piano music hatch more rapidly than those that are not (Tanaka et al, 2018).…”

Section: Methods Of Recording the Vibrations Emitted By Eggsmentioning

confidence: 96%

“…In the migratory locust, Locusta migratoria L. (Orthoptera: Acrididae), eggs separated by a few millimetres do not hatch synchronously whereas those kept in contact do (Tanaka, 2017). Eggs kept in contact with other eggs killed by freezing shortly before hatching, hatch asynchronously, which provides no evidence for the involvement of chemical stimuli in controlling synchronous hatching (Tanaka et al, 2018). In contrast, separated eggs can hatch as synchronously as those kept in contact with one another when they are connected by a piece of metal wire, which indicates that synchronous hatching may be controlled by a vibrational stimulus produced by the embryos (Tanaka et al, 2018).…”

Section: Methods Of Recording the Vibrations Emitted By Eggsmentioning

confidence: 99%

“…In contrast, separated eggs can hatch as synchronously as those kept in contact with one another when they are connected by a piece of metal wire, which indicates that synchronous hatching may be controlled by a vibrational stimulus produced by the embryos (Tanaka et al, 2018). Interestingly, separated eggs vibrationally stimulated by Mozart piano music hatch more rapidly than those that are not (Tanaka et al, 2018). In this case, however, synchronous hatching is observed only when the music started shortly before hatching, indicating that the embryo becomes ready to respond to such stimuli but hatch only after reaching a certain stage, which is called the standby stage (Tanaka et al, 2018).…”

Section: Methods Of Recording the Vibrations Emitted By Eggsmentioning

confidence: 99%

“…To explain the mechanism that controls synchronous hatching in the migratory locust, we previously proposed a two-step hypothesis (Tanaka et al, 2018), in which an embryo shortly before hatching is assumed to enter a quiescent period at the end of embryogenesis and monitor neighbouring eggs for synchronous hatching. This hypothesis was based on the results of previous studies (Padgham, 1981;Tanaka, 2017).…”

Section: Methods Of Recording the Vibrations Emitted By Eggsmentioning

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: Methods Of Recording the Vibrations Emitted By Eggsmentioning

confidence: 88%