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The progeny production of a hymenopterous parasitoid,Apanteles sp. groupultor, as affected by temperature

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Abstract

Adults of the parasiteApanteles sp. groupultor were held unter constant temperatures (15, 20, 26, 30°C) each within ±1°C. Total progeny production was significantly greater at 26°C, averaging 85 per female and decreased at 15°C and 30°C. Mating behavior showed that both sexes were a polygamous. The range of constant temperature did not greatly alter the progeny sex ratio when female parent had been mated. At 15°C, male activity was adversely affected when both sexes were exposed to it without previous mating, resulting in a higher number of male progeny. A temperature of 26°C was the most appropriate for normal sex ratio.

Résumé

Les adultes du parasiteApanteles sp. groupultor ont été maintenus aux températures constantes de 15, 20, 26 et 30°C ±1°C. La descendance totale était significativement plus grande à 26°C, avec une moyenne de 85 descendants par femelle et elle décroissait à 15°C et 30°C. Le comportement d'accouplement montrait que les deux sexes étaient polygames. La gamme de température constante n'altérait pas plus fortement le sex-ratio de la descendance quand la mère avait été accoupléc. A 15°C, l'activité du mâle était altérée, il en résultait quand les deux sexes étaient exposés sans accouplement préalable, une plus forte descendance mâle. Une température de 26°C est la plus appropriée pour un sex-ratio normal.

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Al-Maliky, S.K., Al-Izzi, M.A.J. The progeny production of a hymenopterous parasitoid,Apanteles sp. groupultor, as affected by temperature. Entomophaga 35, 217–222 (1990). https://doi.org/10.1007/BF02374796

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  • DOI: https://doi.org/10.1007/BF02374796

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