Toxicidade aguda da amônia no processo produtivo de pós-larvas de Penaeus paulensis Pérez-Farfante, 1967 / Acute toxicity of ammonia in the productivity process of postlarvae of Penaeus paulensis Pérez-Farfante, 1967
An. acad. bras. ciênc
; 64(4): 383-9, dez. 1992. tab
Artigo
em Português
| LILACS
| ID: lil-113467
Biblioteca responsável:
BR1.1
RESUMO
Larval shrimp Penaeus paulensis showed a tendency to decrease in ammonia tolerance as the larva metamorphosed from nauplius to postlarvae stage. The 24-h LC50 were 4.04, 1.70, 2.72, and 1.42mg/l NH3-N on nauplii, zoea, mysis and postlarvae, respectively. The zoea stage and the initial postlarvae substages were very susceptible to ammonia. The 96-h LC50 values on zoea and postlarvae were 0.69 mg/l and 0.32 mg/l, against 0.80 mg/l NH3-N on mysis. The eggs of Penaeus paulensis were affected by ammnia, which provoked a progressive decrease in the hatching rate and induced morphological deformities in hatched nauplii. A "safe level" of ammonia was estimated at 0.032 mg/l NH3-N on the basis of 24-h LC50 for eggs
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Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Decápodes
/
Amônia
Limite:
Animais
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Português
Revista:
An. acad. bras. ciênc
Assunto da revista:
Ciência
Ano de publicação:
1992
Tipo de documento:
Artigo
