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

Title:

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

Creator:

Sakamoto, Hironori , Tanaka, Seiji , and Hata, Tamako

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:7afc3e0f-13d0-462e-8d02-cc593a27774c
uuid:7afc3e0f-13d0-462e-8d02-cc593a27774c
doi:10.14411/eje.2019.030

Subject:

Orthoptera, Acrididae, Locusta migratoria, embryo-embryo interaction, hatching synchrony, and vibration

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

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 significantly earlier than those not subjected to this treatment, the control. In contrast, eggs subjected to recordings made 8 to 10 h before hatching significantly 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 sufficient 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.

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

258-268

Source:

European Journal of Entomology | 2019 Volume:116 | Number:1

Harvested from:

CDK

Metadata only:

false