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Time-course mortality and radiosensitivity indices in gamma-irradiated Tribolium spp. (Coleoptera: Tenebrionidae)

Published online by Cambridge University Press:  19 September 2011

Mahbub Hasan
Mahbub Hasan
Affiliation:
Department of Agricultural and Environmental Science, University of Newcastle upon Tyne, NEI 7RU, UK, E-mail: mmhbgd@yahoo.com
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Abstract

The effect of gamma irradiation on the time-course mortality and radiosensitivity indices in 1- and 10-day-old adult Tribolium anaphe, T. brevicornis, T. castaneum, T destructor and T. freemani, was studied. Longevity was always adversely affected by irradiation, and it was linearly dependent on the dose rate. Except for 10-day-old adults, all the insects died within 12 weeks of γ-irradiation at 4 and 5 krad. In addition, T. destructor was markedly more radioresistant at all dose levels, and lived longer than the other species. The mean survival times of adults were generally shorter in females than in males for all species. The radiosensitivity indices did not vary widely among the species, but decreased as the dose increased in all the species, indicating that the resistance of the species was dose-dependent.

Résumé

On a étudié l'effet des radiations gamma sur l'évolution de la mortalité et les indices de radiosensibilité d'adultes de Tribolium anaphe, T. brevicornis, T. castaneum, T. destructor et T. freemani, âgés de 1 et 10 jours. La longévité est toujours négativement affectée par les radiations et elle est linéairement liée à la dose. A l'exception des adultes âgés de 10 jours, tous les insectes meurent en moins de 12 semaines avec des radiations gamma à 4 et 5 krad. De plus, T. destructor est nettement plus radiorésistant à toutes les doses, et vit plus longtemps que les autres espèces. Les temps moyens de survie des adultes sont généralement plus courts chez les femelles que chez les mâles pour toutes les espèces. Les indices de radiosensibilité ne varient pas beaucoup entre les espèces, mais décroissent avec l'augmentation de la dose chez toutes les espèces, indiquant que la résistance des espèces est dose-dépendante.

Keywords

radiosensitivityTribolium spp.gamma irradiationradiosensibilitéTribolium spp.radiation gamma
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 21 , Issue 3 , September 2001 , pp. 213 - 218
Copyright
Copyright © ICIPE 2001

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