| Registro completo |
| Provedor de dados: |
Scientia Agricola
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| País: |
Brazil
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| Título: |
Lethal concentration (CL50) of un-ionized ammonia for pejerrey larvae in acute exposure
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| Autores: |
Piedras,Sérgio Renato Noguez
Pouey,Juvêncio Luís Osório Fernandes
Moraes,Paulo Roberto Rocha
Cardoso,Daniela Fençon
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| Data: |
2006-04-01
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| Ano: |
2006
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| Palavras-chave: |
Pejerrey
Odontesthes bonariensis
Toxicity
Nitrogen
Larvae
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| Resumo: |
Ammonia results from decomposition of effluents organic matter, e.g. feed wastes and fish faeces. Its un-ionized form can be toxic because diffuses easily through fish respiratory membranes, damaging gill epithelium and impairing gas exchanges. The objective of this work was determining the 96-hour CL50 of un-ionized ammonia for newly hatched pejerrey Odontesthes bonariensis larvae. Trials were set up completely randomized design, with three different concentration of un-ionized ammonia (0.57, 0.94, and 1.45 mg L-1 NH3-N) and a control treatment (n = 3). Experimental units were 20-L, aerated aquaria stocked with 20 larvae (average weight 3.9 mg). Pejerrey larvae exposed to un-ionized ammonia during 96 hours present 50% mortality at 0.71 mg L-1 NH3-N.
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| Tipo: |
Info:eu-repo/semantics/report
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000200011
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| Editor: |
São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
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| Relação: |
10.1590/S0103-90162006000200011
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| Formato: |
text/html
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| Fonte: |
Scientia Agricola v.63 n.2 2006
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| Direitos: |
info:eu-repo/semantics/openAccess
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