Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, Brazil

Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, Brazil

The effects of an increasing downriver pollution gradient on the reproductive system of Astyanax fasciatus were investigated in the Rio dos Sinos, RS. The comparison of mean oocyte diameters, gonadal indices and gonado-somatic relationships of specimens captured in polluted areas with individuals fr...

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Main Authors: SCHULZ U. H., MARTINS-JUNIOR H.
Format: Article
Language:English
Published: Instituto Internacional de Ecologia 2001-01-01
Series:Brazilian Journal of Biology
Subjects:
Astyanax fasciatus
biomonitoring
heavy metals
reproduction
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842001000400010
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spelling doaj-2e48d2ee6d0a4748987048ea3ca724c42020-11-24T23:24:39ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1519-69841678-43752001-01-01614615622Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, BrazilSCHULZ U. H.MARTINS-JUNIOR H.The effects of an increasing downriver pollution gradient on the reproductive system of Astyanax fasciatus were investigated in the Rio dos Sinos, RS. The comparison of mean oocyte diameters, gonadal indices and gonado-somatic relationships of specimens captured in polluted areas with individuals from unpolluted reference sites revealed a significant decrease of these parameters with increasing water pollution. High loads of organic and industrial sewage are considered responsible for these effects. Condition factors showed an inverse relationship, and increased significantly in downriver polluted areas. The declining gonadal indices showed that energy was allocated to somatic growth. The results of the study recommend the use of A. fasciatus in biomonitoring essays.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842001000400010Astyanax fasciatusbiomonitoringheavy metalsreproduction
collection DOAJ
language English
format Article
sources DOAJ
author SCHULZ U. H.
MARTINS-JUNIOR H.
spellingShingle SCHULZ U. H.
MARTINS-JUNIOR H.
Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, Brazil
Brazilian Journal of Biology
Astyanax fasciatus
biomonitoring
heavy metals
reproduction
author_facet SCHULZ U. H.
MARTINS-JUNIOR H.
author_sort SCHULZ U. H.
title Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, Brazil
title_short Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, Brazil
title_full Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, Brazil
title_fullStr Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, Brazil
title_full_unstemmed Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, Brazil
title_sort astyanax fasciatus as bioindicator of water pollution of rio dos sinos, rs, brazil
publisher Instituto Internacional de Ecologia
series Brazilian Journal of Biology
issn 1519-6984
1678-4375
publishDate 2001-01-01
description The effects of an increasing downriver pollution gradient on the reproductive system of Astyanax fasciatus were investigated in the Rio dos Sinos, RS. The comparison of mean oocyte diameters, gonadal indices and gonado-somatic relationships of specimens captured in polluted areas with individuals from unpolluted reference sites revealed a significant decrease of these parameters with increasing water pollution. High loads of organic and industrial sewage are considered responsible for these effects. Condition factors showed an inverse relationship, and increased significantly in downriver polluted areas. The declining gonadal indices showed that energy was allocated to somatic growth. The results of the study recommend the use of A. fasciatus in biomonitoring essays.
topic Astyanax fasciatus
biomonitoring
heavy metals
reproduction
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842001000400010
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