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| Fracácio,Renata; Verani,Nelsy Fenerich; Espíndola,Evaldo Luiz Gaeta; Rocha,Odete; Rigolin-Sá,Odila; Andrade,Cássio Arilson. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gill morphology; Sediment toxicity; Danio rerio; Tietê reservoirs; Pollution. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400023 |
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| Oral, Rahime; Kostopoulou, Maria; Guida, Marco; Nikolaou, Anastasia; Quiniou, Francoise; Trifuoggi, Marco; Borriello, Ilaria; Vagi, Maria; D'Ambra, Antonello; Pagano, Giovanni. |
| The aim of the present study was to evaluate marine contamination and toxicity in sediment and pore water from the areas of Izmir Bay (Turkey) and Mytilene Harbor (Greece). The evaluation was performed in terms of selected toxic-metals, polycyclic aromatic compounds (PAR) and toxicity to sea urchin (Paracentrotus lividus) early development and fertilization. Significantly higher levels of metals and total PAR were detected in Izmir vs. Mytilene sediment, and the highest contamination was detected in Izmir Bay innermost sites. Bioassays were carried out in P. lividus embryos and sperm, by evaluating developmental defects and changes in fertilization success by exposing sea urchin embryos or sperm to sediment/seawater suspensions. Whole sediment (WS) showed... |
| Tipo: Text |
Palavras-chave: Sediment toxicity; Whole sediment; Pore water; Sea urchins; Aegean Sea. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00125/23600/21447.pdf |
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| Galgani, Francois; Chiffoleau, Jean-francois; Orsoni, Valerie; Costantini, Louis; Boissery, P; Calendini, S; Andral, Bruno. |
| Trace metals (Cd, Pb, Cu, Cr, Ni, Co, Zn, Hg, As, Mn, Al, Fe, and Li) and organic compounds (PCBs, PAHs, lindanes, and DDT and its degradation products) were measured in coastal sediment samples from 27 sites in lagoons and along coastal areas of Corsica. An oyster embryo bioassay evaluated the toxicity of sediments from sites in three coastal lagoons (Urbino, Diane, and Biguglia) and the west coast of Cape Corsica. Despite contamination levels generally lower than those in other Mediterranean coastal areas, contamination is found in specific sites in Corsica and includes natural arsenic contamination on the east coast, insecticide pollution (persistent lindane and DDT) in many areas, both cadmium and lead contamination around Sagone, general contamination... |
| Tipo: Text |
Palavras-chave: Corsica; Sediment toxicity; Chemical contamination. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-2169.pdf |
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