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

2008; INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA; Volume: 38; Issue: 4 Linguagem: Inglês

10.1590/s0044-59672008000400023

1809-4392

Sarah Ragonha de Oliveira, Rondon Tatsuta Yamane Baptista de Souza, Érica da Silva Santiago Nunes, Cristiane Suely Melo de Carvalho, Glauber Cruz de Menezes, Jaydione Luíz Marcon, Rodrigo Roubach, Eduardo Akifumi Ono, Elizabeth Gusmão Affonso,

Aquaculture disease management and microbiota

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.