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Acute toxicity of nitrate in Litopenaeus vannamei juveniles at low salinity levels Ciência Rural
Alves Neto,Inácio; Brandão,Hellyjúnyor; Furtado,Plínio Schmidt; Wasielesky Jr,Wilson.
ABSTRACT: Different technologies have been developed to improve the performance of Litopenaeus vannamei in low salinity, mainly in super-intensive systems like recirculation and BFT (Biofloc Technology System) systems. However, there is an accumulation of toxic nitrogenous compounds to the shrimps such as nitrate, that at high concentrations and depending on the salinity of the culture water can be lethal. Acute toxicity tests allow to analyze the relationship between the compound and other abiotic or biotic variables. The aim of this research was to determine the acute toxicity and safety level of nitrate (N-NO3 -) for juveniles of L. vannamei at salinities of 5 and 10g.L-1. For salinity of 5g.L-1, a control and 5 treatments were tested, with nitrate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Median lethal concentration; Pacific white shrimp; Brackish water.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000100401
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Shrimp farming as an alternative to artisanal fishermen communities: the Case of Patos Lagoon, Brazil BABT
Cavalli,Ronaldo Olivera; Wasielesky Jr,Wilson; Peixoto,Silvio; Poersch,Luís Henrique da Silva; Santos,Marcos Henrique Silva; Soares,Roberta Borda.
The shrimp Farfantepenaeus paulensis is considered a suitable species for culture in the Patos Lagoon estuary, southern Brazil, where its catch has been decreasing in the last few years. Considering the potential of estuarine areas for shrimp farming, the application of low-cost structures to culture shrimp, such as the pen enclosures, is being proposed as an alternative source of income for artisanal fishermen and farmers living near Patos Lagoon. From an economical standpoint, these alternative systems present several advantages over the traditional pond-based culture systems since land, water pumping and artificial aerations are not required, high natural productivity is available and inexpensive materials are employed in the construction of grow-out...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Shrimp farming; Alternative culture; Pen enclosure; Farfantepenaeus paulensis.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500016
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