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Etude expérimentale de l'influence des glandes prothoraciques sur l'activité de vol du Criquet Pélerin Schistocerca gregaria

Abstract : The influence of the prothoracic glands upon the flight activity of male desert locusts, Schistocerca gregaria (Forsk.), bred in high density groups, has been studied on individual roundabouts, in darkness, and without any stimulus. Implantation of a pair of large prothoracic glands from 5-day-old adults bred in isolation for at least three generations results on day 6 in a decrease of about 55% of the time spent flying by animals which were previously able to fly 9 hr nonstop. The effect may be felt for about 9 days. A pair of identical glands implanted in animals capable only of intermittent flights, about 30 min in all, reduces very rapidly their flight activity to mere reactions of escape (at the beginning of the tests with the roundabouts). The inhibitory action lasts for 12 days. A pair of prothoracic glands from 5-day-old individuals bred in high density groups do not perturb the expression of flight in locusts capable of sustained flight, but decrease by one-third the flight capacity of animals with small flight tendency. This inhibitory action is felt for 8 days. The possible reasons for the disappearance of the inhibitory effect of the glands are discussed.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01368598
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Submitted on : Monday, September 19, 2016 - 5:19:37 PM
Last modification on : Thursday, January 9, 2020 - 4:08:05 PM

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Raoul Michel. Etude expérimentale de l'influence des glandes prothoraciques sur l'activité de vol du Criquet Pélerin Schistocerca gregaria. General and Comparative Endocrinology, Elsevier, 1972, 19 (1), pp.96-101. ⟨10.1016/0016-6480(72)90010-X⟩. ⟨hal-01368598⟩

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