Alterations on growth and gill morphology of Danio rerio (Pisces, Ciprinidae) exposed to the toxic sediments
Open Access
- 1 December 2003
- journal article
- Published by FapUNIFESP (SciELO) in Brazilian Archives of Biology and Technology
- Vol. 46 (4), 685-695
- https://doi.org/10.1590/s1516-89132003000400023
Abstract
The objective of this work was to assess the toxicity of sediment samples from six cascade reservoirs in Tietê river system, in São Paulo State, Brazil, through chronic-partial toxicity bioassays with Danio rerio larvae as test-organisms. Histology of gills and biometric measurements were used to determine the existence of toxicity problems. The alterations on gill morphology here detected were considered of first stage (hyperplasia, lamellar junction and excess of mucous cells) in the first reservoirs and very slight in the last ones. The biometric analysis pointed to inadequate conditions for the growth of the test-organisms when exposed to the sediment of the rivers and upstream reservoirs and also indicated an improvement of environmental conditions along the system.Keywords
This publication has 6 references indexed in Scilit:
- Relationship between ultrastructural changes and EROD activities in liver of fish exposed to Benzo[a]pyreneEnvironmental Pollution, 1999
- THE CHLORIDE CELL:Structure and Function in the Gills of Freshwater FishesAnnual Review of Physiology, 1997
- Influence of dissolved organic matter on copper binding, and calcium on cadmium binding, by gills of rainbow troutJournal of Fish Biology, 1997
- Cadmium dynamics in fish: pulse studies with 109Cd in female zebrafish, Brachydanio rerioJournal of Fish Biology, 1985
- Cadmium‐induced changes in gill morphology of zebrafish, Brachydanio rerio (Hamilton–Buchanan), and rainbow trout, Salmo gairdneri RichardsonJournal of Fish Biology, 1985
- A 96-hour sediment bioassay of Duluth and Superior Harbor basins (Minnesota) usingHexagenia Limbata,Asellus communis, Daphnia magna, andPimephales promelas as test organismsBulletin of Environmental Contamination and Toxicology, 1977