fulltext.study @t Gmail

UVA/UVB-induced genotoxicity and lesion repair in Colossoma macropomum and Arapaima gigas Amazonian fish

Paper ID Volume ID Publish Year Pages File Format Full-Text
31023 44529 2010 7 PDF Available
Title
UVA/UVB-induced genotoxicity and lesion repair in Colossoma macropomum and Arapaima gigas Amazonian fish
Abstract

Ultraviolet radiation is known to cause adverse effects to aquatic species and aquatic environments. The fish Colossoma macropomum (tambaqui) and Arapaima gigas (pirarucu) live in the Amazon basin, near the Equator, and thus receive high intensity of ultraviolet radiation. Deforestation further aggravates the situation by reducing shade at ground level. The aim of this study was to evaluate the genotoxic effects of UVA and UVB radiation on erythrocytes of tambaqui and pirarucu fish using Micronuclei test and Comet assay. Our study showed that UV radiation caused DNA damage in both species as detected by Comet assay. In addition, there were differences in response to genotoxicity between both species, which are possibly related to their evolutionary history. Tambaqui fish exposed to ultraviolet radiation for different periods presented clear dose–response in DNA damage profile. Significant damage repair was observed 24 h after cessation of ultraviolet radiation exposure. At the test conditions used, no significant increase in micronucleated cells was observed in tambaqui and pirarucu fish. Tambaqui proved to be more sensitive to ultraviolet radiation than Pirarucu, as detected by Comet assay, showing statistically higher baseline DNA damage. The present results demonstrated that alkaline Comet assay was very sensitive for detecting the UV-induced genotoxicity during the short exposure period in our study. In addition, the present study also suggests that tambaqui and pirarucu fish are useful sentinel organisms, as their UV sensitivity allows them to be effective monitors of biological hazards in the Amazon region.

Keywords
Ultraviolet radiation; Comet assay; Micronucleus test; Colossoma macropomum; Arapaima gigas; Amazon region
First Page Preview
UVA/UVB-induced genotoxicity and lesion repair in Colossoma macropomum and Arapaima gigas Amazonian fish
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 99, Issue 2, 3 May 2010, Pages 93–99
Authors
, , , , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us