Toxicidade Aguda Da Amônia, Nitrito E Nitrato Sobre Os Juvenis De Camarãorosa Farfantepenaeus Brasiliensis (Latreille, 1817) (Crustacea: Decapoda)

Abstract

RESUMOO desenvolvimento e domínio das técnicas de aquicultura têm levado a intensificação na criação de diferentes espécies, existindo uma tendência de incremento na concentração de compostos nitrogenados nos sistemas de cultivo. Os compostos nitrogenados ocorrem naturalmente no meio aquoso, podendo provocar mortalidade ou afetar o crescimento dos organismos criados. As formas nitrogenadas mais abundantes nos viveiros são a amônia, nitrito e nitrato. Juvenis de camarão-rosa, Farfantepenaeus brasiliensis, foram expostos a diferentes concentrações de amônia, nitrito e nitrato em ensaios de curta duração. Os valores de concentração letal (CL50) para amônia, nitrito e nitrato para 24h a 96h foram respectivamente 24,77 a 8,81mg/L; 252,04 a 105,97mg/L; 1882,63 a 912,07mg/L. De acordo com os resultados obtidos foi possível estimar o nível de segurança de amônia, nitrito e nitrato para juvenis de camarão-rosa em 0,88mg/L, 10,60 e 91,21mg/L, respectivamente.PALAVRAS CHAVE: Amônia, Nitrito, Nitrato, Farfantepenaeus brasiliensis. ABSTRACT Acute toxicity of ammonia, nitrite and nitrate on pink-shrimp juvenile Farfantepenaeus brasiliensis(Latreille, 1817) (Crustacea: Decapoda). The development of new techniques has led to the intensification of aquaculture regarded to rearing of different species. Therefore, there is a tendency to increase the generation of nitrogen compounds in these cropping systems. The nitrogen compounds naturally occur in the water of rearing systems, and may cause death or affect the individual growth. The most abundant nitrogen forms in the ponds are ammonia, nitrite and nitrate. The juveniles of pink-shrimp, Farfantepenaeus brasiliensis were exposed to different concentrations of ammonia, nitrite and nitrate. The LC50 values for ammonia, nitrite and nitrate for 24h to 96h are respectively 24.77 to 8.81mg/L, 252.04 to 105.97mg/L, 1882.63 to 912.07mg/L, respectively. The safe level of ammonia, nitrite and nitrate to pink shrimp juveniles estimated were 0.88mg/L, 10.60 and 91.21mg/L, respectively.

Nitrite toxicity toLitopenaeus schmitti(Burkenroad, 1936, Crustacea) at different salinity levels

“…The effects of nitrite in shrimp juveniles have been studied in P. monodon (Chen & Lei ; Chen & Cheng , ), Macrobrachium rosembergii (Armstrong, Chippendale, Knight & Colt ; Wajsbrot, Gasith, Krom & Samocha ), P. penicillatus (Chen & Lin ), P. japonicus (Chen & Cheng ; Cheng & Chen ), P. chinensis (Chen & Lin ), Farfantepenaeus brasilienis (Campos, Filho, D'incao, Poersch & Wasielesky ), and Litopenaeus vannamei (Lin & Chen ; Gross, Abutbul & Zilberg ; Sowers et al . ).…”

Chronic effect of nitrite on the rearing of the white shrimpLitopenaeus vannameiin two salinities

“…Nitrogenous compounds can injure the gill tissue, affecting the consumption of oxygen and/or cause mortality of the organisms in rearing (Lin & Chen 2001Campos et al 2012;Barbieri et al 2014). TAN results from excretion and the decomposition of organic matter, and, in higher concentrations, it can negatively affect the performance of the organisms in rearing, which may lead to mortality (Lin & Chen 2001).…”

“…Several researchers evaluated the acute toxicity of the nitrogenous compounds in penaeid shrimps (Lin & Chen 2003;Gross et al 2004, Campos et al 2012Barbieri et al 2014). Few data have, however, been published on the chronic effects of nitrite in L. vannamei.…”

The effect of stocking density on the transport of pink shrimp Farfantepenaeus brasiliensis (Crustacea: Decapoda), as live bait for sport fishing in Brazil

“…According to Campos et al (2012), the lethal concentration of total ammonia (LC 50-24 h ) for juvenile (0.3 g) F. brasiliensis is 24.77 mg L -1 . In this same study, the authors recommended that the safe level of ammonia for F. brasiliensis be set at 10% of the LC 50 to avoid mortality.…”