title: Environmental stress and genetic damage in aquatic organisms.
abstract: This work was planned to investigate the effect of pollution upon the genetic material of aquatic organisms. In order to achieve such a purpose, Tilapia nilotica and Tilapia zillii were chosen and caught from two regions varying in their environmental stress; the first is River Nile and the second is a closed drain which receives domestic sewage. Mitotic activity, chromosomal aberrations and in vivo induction of sister chromatid exchanges were examined in gills as well as in kidneys. The results obtained revealed that the environmental stress was proven to be capable of causing inhibition of cell proliferation; clastogenic effect and primary DNA damage in gills and kidneys of both species with differential effect.
authors.affiliation: Department of Genetics, Faculty of Agriculture, Alexandria University.
authors.forename: S A
authors.initials: SA
authors.lastname: Riad
authors.forename: A
authors.initials: A
authors.lastname: Hafez
mesh_terms: D000818:Animals; D049109:Cell Proliferation; D002869:Chromosome Aberrations / Q000706:statistics & numerical data / Q000662:veterinary; D023681:Cichlids / Q000235:genetics*; D004249:DNA Damage / Q000235:genetics*; D004534:Egypt; D004784:Environmental Monitoring / Q000379:methods / Q000592:standards; D005880:Gills / Q000648:ultrastructure; D007621:Karyotyping; D007668:Kidney / Q000648:ultrastructure; D008677:Metaphase / Q000235:genetics; D008940:Mitotic Index; D009153:Mutagens / Q000009:adverse effects; D045483:Rivers; D012680:Sensitivity and Specificity; D012722:Sewage; D012854:Sister Chromatid Exchange / Q000235:genetics*; D013312:Stress, Physiological / Q000150:complications; D014876:Water Pollution / Q000009:adverse effects*
chemical_list: D009153:Mutagens; D012722:Sewage