title: Acute Toxicity of Nitrite to Various Life Stages of the Amazon River Prawn, Macrobrachium amazonicum, Heller, 1862.
abstract: This study determined the effects of nitrite on different life stages of the Amazon river prawn Macrobrachium amazonicum. Prawns of each life stage (postlarvae, juveniles and adults) were stocked in 24 experimental units (n = 10 prawns), under a complete randomized design. Individuals were exposed to nitrite (0, 1, 2, 4, 8 and 16 mg L-1). The median lethal concentration after 96 h (96 h LC50) was calculated through the Weibull I. The mortality results showed that M. amazonicum is slightly less tolerant to nitrite than other species of Macrobrachium. The 96 h LC50for postlarvae, juveniles and adults of M. amazonicum were of 1.49, 2.36 and 2.34 mg nitrite/L, respectively. Nitrite intoxication risk quotient suggest moderated risk to low risk to the species. Usually in production systems nitrite values are lower than safe levels suggested in this study (0.1 mg L-1to postlarvae and 0.2 mg L-1nitrite to juvenile and adults), which makes our results appropriate for the production of this species.
authors.affiliation: Setor de Ciências Biológicas, Programa de Pós-Graduação em Zoologia, Centro Politécnico, Universidade Federal do Paraná, Jardim das Américas, 81531-980, Curitiba, Paraná, Brazil. fabricio.m.dutra@gmail.com.|Setor Palotina, Programa de Pós-Graduação em Aquicultura e Desenvolvimento Sustentável, Universidade Federal do Paraná, Rua Pioneiro, 2153, Jardim Dallas, Palotina, Paraná, 859500-000, Brazil. fabricio.m.dutra@gmail.com.
authors.forename: Fabrício Martins
authors.initials: FM
authors.lastname: Dutra
authors.affiliation: Setor de Ciências Biológicas, Programa de Pós-Graduação em Zoologia, Centro Politécnico, Universidade Federal do Paraná, Jardim das Américas, 81531-980, Curitiba, Paraná, Brazil.
authors.forename: Carolina Arruda
authors.initials: CA
authors.lastname: Freire
authors.affiliation: Setor Palotina, Programa de Pós-Graduação em Aquicultura e Desenvolvimento Sustentável, Universidade Federal do Paraná, Rua Pioneiro, 2153, Jardim Dallas, Palotina, Paraná, 859500-000, Brazil.
authors.forename: André Martins
authors.initials: AM
authors.lastname: Vaz Dos Santos
authors.affiliation: Setor de Ciências Biológicas, Programa de Pós-Graduação em Ecologia e Conservação, Centro Politécnico, Universidade Federal do Paraná, Jardim das Américas, 81531-980, Curitiba, Paraná, Brazil.
authors.forename: Sandra Carla
authors.initials: SC
authors.lastname: Forneck
authors.affiliation: Setor Palotina, Programa de Pós-Graduação em Aquicultura e Desenvolvimento Sustentável, Universidade Federal do Paraná, Rua Pioneiro, 2153, Jardim Dallas, Palotina, Paraná, 859500-000, Brazil.
authors.forename: Claudia Caramelo
authors.initials: CC
authors.lastname: Brazão
authors.affiliation: Setor de Ciências Biológicas, Programa de Pós-Graduação em Zoologia, Centro Politécnico, Universidade Federal do Paraná, Jardim das Américas, 81531-980, Curitiba, Paraná, Brazil.|Setor Palotina, Programa de Pós-Graduação em Aquicultura e Desenvolvimento Sustentável, Universidade Federal do Paraná, Rua Pioneiro, 2153, Jardim Dallas, Palotina, Paraná, 859500-000, Brazil.
authors.forename: Eduardo Luis Cupertino
authors.initials: EL
authors.lastname: Ballester
mesh_terms: D000818:Animals; D059001:Aquatic Organisms / Q000187:drug effects / Q000254:growth & development; D004305:Dose-Response Relationship, Drug; D007928:Lethal Dose 50; D009573:Nitrites / Q000633:toxicity*; D033541:Palaemonidae / Q000187:drug effects* / Q000254:growth & development*; D045483:Rivers
chemical_list: D009573:Nitrites
keywords: Freshwater prawn; Macrobrachium; Nitrogen compound; Toxicity