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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
1989
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| Accès en ligne: | https://www.redalyc.org/articulo.oa?id=37050106 |
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Table des matières:
- Studies on sibling Drosophila species from Laguna Verde, Veracruz, México III. Effects of radiation on viability M. E. de la Rosa O. Olvera L. Levine R. F. Rockwell J. Guzmán Ciencias de la Tierra The sibliig specics Drosopl~ila ntelanogaster and D. simulans were collected fromtwo sites at Laguna Verde, Veracruz, Mexico. Isofemale lines were establishedfrom each species from both sites. Eggs of each isofemale line were exposed toacute y-radiation doses of 4.0, 6.0 or 8.0 Gy from an externa1 source, and thenplaced in vials. Non-irradiated eggs served as a control. Each vial was scored forthe number of adults produced. For the flies collected at Site-1, D. melanogasterwas superior in viability to D. simulans. However, for the flies coiiected at Site-11,there was no significant difference in egg to adult survival between the species. Acomparison of irradiated and control groups of each species from the variouscollections showed that in both collections made in July there was a significantreduced viability of irradiated groups, but this difference was completely absent inthe collection madc in January. A comparison of the control groups of each speciesfrom the various col-lections showed that Site-1 D. melanogaster were superior tothose fromsite-11. For D.simularts collected in July, Site-1 flies showed significantlygreater viability than Site-11 flies. However, this difference disappears when onecompares collections made at opposite seasons of the year. This complex situationinvolving both populational and seasonal differences in viability is discussed. 1989 artículo científico 0188-4999 https://www.redalyc.org/articulo.oa?id=37050106 en http://www.redalyc.org/revista.oa?id=370 Revista Internacional de Contaminación Ambiental application/pdf Universidad Nacional Autónoma de México Revista Internacional de Contaminación Ambiental (México) Num.1 Vol.5