Acute Toxicity of Nitrite to Various Life Stages of the Amazon River Prawn, Macrobrachium amazonicum, Heller, 1862

作者: Fabrício Martins Dutra , Carolina Arruda Freire , André Martins Vaz dos Santos , Sandra Carla Forneck , Claudia Caramelo Brazão

DOI: 10.1007/S00128-016-1932-2

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摘要: This study determined the effects of nitrite on different life stages Amazon river prawn Macrobrachium amazonicum. Prawns each stage (postlarvae, juveniles and adults) were stocked in 24 experimental units (n = 10 prawns), under a complete randomized design. Individuals exposed to (0, 1, 2, 4, 8 16 mg L−1). The median lethal concentration after 96 h (96 h LC50) was calculated through Weibull I. mortality results showed that M. amazonicum is slightly less tolerant than other species Macrobrachium. LC50 for postlarvae, adults 1.49, 2.36 2.34 mg nitrite/L, respectively. Nitrite intoxication risk quotient suggest moderated low species. Usually production systems values are lower safe levels suggested this (0.1 mg L−1 postlarvae 0.2 mg L−1 juvenile adults), which makes our appropriate

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