Data/hora: 11/06/2024 03:35:16

Provedor de dados: | 63
País: | Brazil
Título: | Lethal concentration (CL50) of un-ionized ammonia for pejerrey larvae in acute exposure
Autores: | Piedras,Sérgio Renato Noguez; Pouey,Juvêncio Luís Osório Fernandes; Moraes,Paulo Roberto Rocha; Cardoso,Daniela Fençon.
Data: | 2006-04-01
Ano: | 2006
Palavras-chave: | Pejerrey; Odontesthes bonariensis; Toxicity; Nitrogen; Larvae.
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.
Tipo: | Info:eu-repo/semantics/report
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000200011
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162006000200011
Formato: | text/html
Fonte: | Scientia Agricola  v.63 n.2 2006
Fonte: | info:eu-repo/semantics/openAccess