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Variations de la tendance au vol soutenu du criquet Pélerin Schistocerca gregaria après implantations de corpora cardiaca

Abstract : An attempt has been made to determine the influence of the corpora cardiaca on sustained flight tendency shown by Schistocerca gregaria male imagos reared in dense groups or in isolation, taking into consideration the presence or absence of the corpora allata. Corpora cardiaca either whole or in part (glandular or neurohaemal lobe) from either good or poor flyers were inserted into the abdomen of either good or poor flyers. A small amount of extra corpora cardiaca or neurohaemal lobe from good flyers favours sustained flight. A large amount from good or poor flyers inhibits flight. Allatectomized recipients react like intact animals, but locusts isolated for several generations scarcely react. Glandular lobes are without effect and so are corpora cardiaca taken from good fliers about 15 days after their connexions with the brain have been cut. Organs taken from good fliers just after a long flight are also of little effect. It is concluded that factors are elaborated by the pars intercerebralis, then stored and activated in the neurohaemal part of the corpora cardiaca: these organs alone do not control flight tendency.
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Submitted on : Monday, September 19, 2016 - 4:24:30 PM
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Raoul Michel. Variations de la tendance au vol soutenu du criquet Pélerin Schistocerca gregaria après implantations de corpora cardiaca. Journal of Insect Physiology, Elsevier, 1973, 19 (6), pp.1317-1325. ⟨10.1016/0022-1910(73)90214-X⟩. ⟨hal-01368534⟩

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