Tolerance to temperature, pH, ammonia and nitrite in cardinal tetra, Paracheirodon axelrodi, an amazonian ornamental fish

Poor water quality condition has been pointed out as one of the major causes for the high mortality of ornamental fishes exported from the state of Amazonas, Brazil. The purpose of the current study was to define water quality standards for cardinal tetra (Paracheirodon axelrodi), by establishing th...

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Veröffentlicht in:Acta amazonica 2008-12, Vol.38 (4), p.773-779
Hauptverfasser: Oliveira, Sarah Ragonha de, Souza, Rondon Tatsuta Yamane Baptista de, Nunes, Érica da Silva Santiago, Carvalho, Cristiane Suely Melo de, Menezes, Glauber Cruz de, Marcon, Jaydione Luíz, Roubach, Rodrigo, Ono, Eduardo Akifumi, Affonso, Elizabeth Gusmão
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container_end_page 779
container_issue 4
container_start_page 773
container_title Acta amazonica
container_volume 38
creator Oliveira, Sarah Ragonha de
Souza, Rondon Tatsuta Yamane Baptista de
Nunes, Érica da Silva Santiago
Carvalho, Cristiane Suely Melo de
Menezes, Glauber Cruz de
Marcon, Jaydione Luíz
Roubach, Rodrigo
Ono, Eduardo Akifumi
Affonso, Elizabeth Gusmão
description Poor water quality condition has been pointed out as one of the major causes for the high mortality of ornamental fishes exported from the state of Amazonas, Brazil. The purpose of the current study was to define water quality standards for cardinal tetra (Paracheirodon axelrodi), by establishing the lower and higher for lethal temperature (LT50), lethal concentration (LC50) for total ammonia and nitrite and LC50 for acid and alkaline pH. According to the findings, cardinal tetra is rather tolerant to high temperature (33.3 ºC), to a wide pH range (acid pH=2.9 and alkaline pH=8.8) and to high total ammonia concentration (23.7 mg/L). However, temperatures below 19.6 ºC and nitrite concentrations above 1.1 mg/L NO2- may compromise fish survival especially during long shipment abroad. A má qualidade da água tem sido apontada como uma das maiores causas da alta mortalidade dos peixes ornamentais exportados pelo Estado do Amazonas, Brasil. A proposta deste estudo foi definir padrões de qualidade da água para o cardinal tetra (Paracheirodon axelrodi), estabelecendo a menor e a maior temperatura letal (LT50), a concentração letal (LC50) para amônia total e nitrito e LC50 para pH ácido e alcalino. De acordo com os resultados, o cardinal tetra é mais tolerante a temperaturas elevadas (33,3 ºC), a amplos limites de pH (pH ácido = 2,9 e pH alcalino = 8,8) e a alta concentração de amônia (23,7 mg/L). Entretanto, temperaturas abaixo de 19,6 ºC e concentrações de nitrito acima de 1,1 mg/L NO2- podem comprometer a sobrevivência dos peixes, especialmente durante longos períodos de transporte para o exterior.
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title Tolerance to temperature, pH, ammonia and nitrite in cardinal tetra, Paracheirodon axelrodi, an amazonian ornamental fish
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