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| Lemonnier, Hugues; Faninoz, Sebastien. |
| An experiment was conducted in six earthen ponds with 20 shrimps m(-2) Litopenaeus stylirostris (Stimpson) during the warm season in New Caledonia to study the dynamics of wastes in relation with water exchange rate (WER). The nitrogen budget was established, taking into account the different forms of nitrogen in the water, sediment, feed and shrimp. Data from a wide range of treatments applied in unreplicated ponds were treated using regression analysis to establish the relationship between WER and partial nitrogen budget, sediment characteristics and shrimp performance. To compare effluent quality between treatments during the season, data were analysed using the non-parametric sign test. The water outflow was characterized by a decrease in the... |
| Tipo: Text |
Palavras-chave: New Caledonia; Nitrogen; Water exchange; Shrimp; Sediment quality; Effluent. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1811.pdf |
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| Silva, Yuri Jacques Agra Bezerra da; Cantalice, José Ramon Barros; Singh, Vijay Pal; Nascimento, Clístenes Williams Araújo do; Wilcox, Bradford Paul; Silva, Ygor Jacques Agra Bezerra da. |
| Metal concentrations in suspended sediments of one of the most polluted rivers in Brazil were measured. Concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were determined by inductively coupled plasma while Hg and As were analyzed with hydride generation flow injection atomic absorption spectroscopy. Contamination of As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn was assessed using pollution indices, ecological risk assessment, statistical multivariate techniques and comparison with sediment quality guidelines. Suspended sediments of the upstream portion of the Ipojuca River are moderately contaminated, especially with Mn and As. On the other hand, sediments of the downstream section are highly contaminated, mainly with Zn, Pb, and As. Furthermore, the mean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: River pollution; Soil conservation; Sediment quality; Trace elements.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42620 |
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| Silva, Yuri Jacques Agra Bezerra da; Cantalice, José Ramon Barros; Singh, Vijay Pal; Nascimento, Clístenes Williams Araújo do; Wilcox, Bradford Paul; Silva, Ygor Jacques Agra Bezerra da. |
| Metal concentrations in suspended sediments of one of the most polluted rivers in Brazil were measured. Concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were determined by inductively coupled plasma while Hg and As were analyzed with hydride generation flow injection atomic absorption spectroscopy. Contamination of As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn was assessed using pollution indices, ecological risk assessment, statistical multivariate techniques and comparison with sediment quality guidelines. Suspended sediments of the upstream portion of the Ipojuca River are moderately contaminated, especially with Mn and As. On the other hand, sediments of the downstream section are highly contaminated, mainly with Zn, Pb, and As. Furthermore, the mean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: River pollution; Soil conservation; Sediment quality; Trace elements.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42620 |
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