The toxicity of ammonia, nitrite and nitrate to the fish, Catla catla (Hamilton)

J Environ Biol. 2002 Apr;23(2):147-9.


The acute toxicity of unionized ammonia; nitrite and nitrate to the Indian major carp Catla catla (Hamilton) was determined using static and continuous flow through systems for 24 hours. The median lethal concentration (LC50) values for 24 h of ammonia (NH3-N), nitrite (NO2-N) and nitrate (NO3-N) were 0.045 mg/l, 120.84 mg/l and 1565.43 mg/l in static test respectively and were 0.036 mg/l, 117.43 mg/l and 1484.08 mg/l in continuous flow through test respectively.

MeSH terms

  • Ammonia / adverse effects*
  • Animals
  • Carps / physiology*
  • Lethal Dose 50
  • Nitrates / adverse effects*
  • Nitrites / adverse effects*
  • Water Movements
  • Water Pollutants / adverse effects*


  • Nitrates
  • Nitrites
  • Water Pollutants
  • Ammonia