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The Effect of Gamma Radiation on the Fertility and Longevity Of Dolichoderus Quadripunctatus (Hymenoptera: Formicoidea Dolichoderidae); Effets des Radiations Gamma sur la Fertilite et la Longevite des Colonies de Dolichoderus Quadripunctatus (Hymenoptere: Formicoidea Dolichoderidae)

Conference:

Abstract

The authors studied on a batch of 27 colonies of the ant Dolichoderus quadripunctatus the effect on longevity and fertility of gamma irradiation at doses between 12 500 and 150 000 rad. The results are presented in the paper. For colonies consisting solely of workers, the mortality curve is linear with doses between 150 000 and 50 000 rad. The LD{sub 50} is reached in 4 days for the 150 000-rad dose and 16 days for the 50 000-rad dose. The lowest dose used in the experiments (12 500 rad) produced an LD{sub 50} after 18 days. For the control colonies, the LD{sub 50} occurred within about thirty days. Fertility, which is normally regular and constant in colonies of workers of Dolichoderus quadripunctatus is expressed by the R.F. ratio [R.F. - reproduction factor = (number of eggs number of workers at the beginning of the experiment)]. The R. F. of the control (unirradiated) colonies was about 1.60, while that of the irradiated colonies ranged from 0 to 0,06. These extremely low values showed that to all intents and purposes the treated colonies were made sterile. This sterility was final, no laying being observed in the irradiated colonies, by the time  More>>
Authors:
Torossian, C.; [1]  Causse, R. [2] 
  1. Faculte des Sciences, Universite de Toulouse (France)
  2. INRA, Station de Zoologie, Centre de Recherches Agronomiques du Sud-Est, Montfavet (France)
Publication Date:
Jun 15, 1968
Product Type:
Conference
Report Number:
IAEA-SM-102/17
Resource Relation:
Conference: Symposium on the Use of Isotopes and Radiation in Entomology, Vienna (Austria), 4-8 Dec 1967; Other Information: 10 refs., 2 tabs., 2 figs.; Related Information: In: Isotopes and Radiation in Entomology. Proceedings of a Symposium on the Use of Isotopes and Radiation in Entomology| 445 p.
Subject:
60 APPLIED LIFE SCIENCES; ANTS; CONTROL; DOSES; EGGS; FEMALES; FERTILITY; GAMMA RADIATION; MORTALITY; POPULATIONS; REPRODUCTION; STERILITY
OSTI ID:
22106381
Research Organizations:
International Atomic Energy Agency, Vienna (Austria); Food and Agriculture Organization, Rome (Italy)
Country of Origin:
IAEA
Language:
French
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M0914064202
Submitting Site:
INIS
Size:
page(s) 155-162
Announcement Date:
Jun 20, 2013

Conference:

Citation Formats

Torossian, C., and Causse, R. The Effect of Gamma Radiation on the Fertility and Longevity Of Dolichoderus Quadripunctatus (Hymenoptera: Formicoidea Dolichoderidae); Effets des Radiations Gamma sur la Fertilite et la Longevite des Colonies de Dolichoderus Quadripunctatus (Hymenoptere: Formicoidea Dolichoderidae). IAEA: N. p., 1968. Web.
Torossian, C., & Causse, R. The Effect of Gamma Radiation on the Fertility and Longevity Of Dolichoderus Quadripunctatus (Hymenoptera: Formicoidea Dolichoderidae); Effets des Radiations Gamma sur la Fertilite et la Longevite des Colonies de Dolichoderus Quadripunctatus (Hymenoptere: Formicoidea Dolichoderidae). IAEA.
Torossian, C., and Causse, R. 1968. "The Effect of Gamma Radiation on the Fertility and Longevity Of Dolichoderus Quadripunctatus (Hymenoptera: Formicoidea Dolichoderidae); Effets des Radiations Gamma sur la Fertilite et la Longevite des Colonies de Dolichoderus Quadripunctatus (Hymenoptere: Formicoidea Dolichoderidae)." IAEA.
@misc{etde_22106381,
title = {The Effect of Gamma Radiation on the Fertility and Longevity Of Dolichoderus Quadripunctatus (Hymenoptera: Formicoidea Dolichoderidae); Effets des Radiations Gamma sur la Fertilite et la Longevite des Colonies de Dolichoderus Quadripunctatus (Hymenoptere: Formicoidea Dolichoderidae)}
author = {Torossian, C., and Causse, R.}
abstractNote = {The authors studied on a batch of 27 colonies of the ant Dolichoderus quadripunctatus the effect on longevity and fertility of gamma irradiation at doses between 12 500 and 150 000 rad. The results are presented in the paper. For colonies consisting solely of workers, the mortality curve is linear with doses between 150 000 and 50 000 rad. The LD{sub 50} is reached in 4 days for the 150 000-rad dose and 16 days for the 50 000-rad dose. The lowest dose used in the experiments (12 500 rad) produced an LD{sub 50} after 18 days. For the control colonies, the LD{sub 50} occurred within about thirty days. Fertility, which is normally regular and constant in colonies of workers of Dolichoderus quadripunctatus is expressed by the R.F. ratio [R.F. - reproduction factor = (number of eggs number of workers at the beginning of the experiment)]. The R. F. of the control (unirradiated) colonies was about 1.60, while that of the irradiated colonies ranged from 0 to 0,06. These extremely low values showed that to all intents and purposes the treated colonies were made sterile. This sterility was final, no laying being observed in the irradiated colonies, by the time they died out. In colonies with a queen, only the queens were irradiated, with gamma doses of 50 000, 100 000. and 150 000 rad. The results obtained for longevity showed in every case a considerably higher resistance of the females than the workers under the same conditions. Where fertility is concerned, the irradiated females showed a considerable and almost immediate reduction in egg laying. This was followed in the colonies by a resumption of laying by the workers, since the queen could no longer inhibit this. The fertility of the irradiated females subsequently diminished, and became nil from the eighteenth day. The queens did not thereafter resume laying. (author) [French] Les auteurs on etudie sur un lot de 27 colonies (avec ou sans reine) de la fourmi Dolichoderus quadripunctatus les effets, sur la longevite et la fertilite, d'irradiations gamma a des valeurs comprises entre 12 500 et 150 000 rad; les resultats obtenus sont donnes dans le memoire. Dans le cas des colonies exclusivement composees d'ouvrieres la courbe de mortalite est lineaire pour des valeurs comprises entre 150 000 et 50 000 rad. La DL 50 est atteinte en 4 jours pour la dose de 150 000 rad, et 16 jours pour la dose de 50 000 rad. Aux valeurs les plus faibles(12 500 rad) la DL 50 s'obtient apres 18 jours. Pour les colonies temoins la DL50 s'obtient en 30 jours environ. La fecondite, qui est habituellement reguliere et constante dans les colonies d'ouvrieres, est exprimee par le rapport QR = quotient reproducteur (nombre d'oeufs/nombre d'ouvrieres au debut de l'experience). Le QR des colonies temoins (n' ayant subi aucune irradiation) a pour valeur 1,60 environ. Le QR des colonies traitees varie entre 0 et 0,06. Ces valeurs extremement faibles montrent que les colonies traitees sont devenues pratiquement steriles. Cette sterilite est definitive, car jusqu'a l'extinction de la colonie, aucune ponte n' a pu etre observee dans les colonies irradiees. Dans les colonies avec reine, seules les reines subissent une irradiation gamma, aux valeurs de 50 000, 100 000 et 150 000 rad. Les resultats obtenus concernant la longevite montrent dans tous les cas une resistance considerablement plus elevee des femelles que pour les ouvrieres placees dans les memes conditions. Pour ce qui est de la fecondite, on observe chez les reines irradiees un ralentissement considerable et quasi immediat de leur ponte. Ce ralentissement est suivi dans les colonies par une reprise de la ponte des ouvrieres: la reine ne peut plus exercer l'inhibition de leur ponte. Par la suite, la fecondite des reines irradiees diminue et devient nulle 3 partir du 18{sup e} jour. Il n'y a plus de reprise de la ponte des reines par la suite. (author)}
place = {IAEA}
year = {1968}
month = {Jun}
}