title: [Acute toxicity of ammonia to Artemia sp].
abstract: The acute toxicity of total ammonia-N, (NH3 + NH4+), and un-ionized ammonia-N, NH3-N, on newly hatched Artemia nauplii and Artemia adults was measured in 24, 48, 72, and 96-h semi-static bioassays system. There was a significant difference (P < 0.05) in medial lethal concentrations (LC50) obtained during the tests. The LC50 values on nauplii ranged from 650 mg/l, in 24-h, to 399.1 mg/l total ammonia-N, in 96-h, while the LC50 values on adults ranged from 1290.4 mg/l to 600.5 mg/l total ammonia-N, in the same period. Two methods for calculations of un-ionized ammonia toxicity are analyzed and discussed.
authors.affiliation: Laboratório de Carcinocultura, Centro de Biologia Marinha, Pontal do Sul, PR.
authors.forename: A
authors.initials: A
authors.lastname: Ostrensky
authors.forename: W
authors.initials: W
authors.lastname: Wasielesky Júnior
authors.forename: D
authors.initials: D
authors.lastname: Pestana
mesh_terms: D000641:Ammonia / Q000633:toxicity*; D000818:Animals; D001156:Artemia / Q000187:drug effects*; D006863:Hydrogen-Ion Concentration; D013997:Time Factors
chemical_list: D000641:Ammonia
vernacular_title: Toxicidade aguda da amônia para Artemia sp.