Open AccessJoint Action of Ammonia and Nitrite on Tiger Prawn Penaeus monodon Postlarvae
Author(s) -
Chen JiannChu,
Chin TzongShean
Publication year - 1988
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/j.1749-7345.1988.tb00942.x
Subject(s) - nitrite , ammonia , penaeus monodon , toxicity , prawn , biology , nuclear chemistry , chemistry , food science , zoology , shrimp , biochemistry , fishery , nitrate , ecology , organic chemistry
Tiger prawn Penaeus monodon postlarvae (PL6) were exposed to a mixture of ammonia and nitrite by the static renewal method. When the toxicity ratio of the ammonia‐nitrite mixture was 1:1, the 48 h, 72 h and 96 h LC50 values were 2.20, 1.43 and 0.84 toxicity units which were equivalent to 12.66 mg/L ammonia‐N (0.60 mg/L NH 3 ‐N) plus 14.91 mg/L nitrite‐N, 8.23 mg/L ammonia‐N (0.39 mg/L NH 3 ‐N) plus 9.69 mg/L nitrite‐N, and 4.83 mg/L ammonia‐N (0.23 mg/ L NH 3 ‐N) plus 5.69 mg/L nitrite‐N. When the toxicity ratio of the ammonia‐nitrite mixture was 51, the 48 h, 72 h and 96 h LC50 values were 2.50, 1.56 and 0.85 toxicity units which were equivalent to 23.98 mg/L ammonia‐N (1.13 mg/L NH 3 ‐N) plus 5.65 mg/L nitrite‐N; 14.96 mg/L ammonia‐N (0.71 mg/L NH 3 ‐N) plus 3.52 mg/L nitrite‐N, and 8.15 mg/L ammonia‐N (0.39 mg/ L NH, N) plus 1.92 mg/L nitrite‐N. A mixture of ammonia and nitrite exerted greater toxicity than high concentrations of either ammonia or nitrite alone. The combined effect of ammonia and nitrite on P. monodon postlarvae was antagonistic for 48 and 72 hours exposure, but synergistic after 96 hours exposure.