In the trial for ambient ammonia-N tolerance, we
found that the 96 h LC50 with 95% confidence limit of
L. vannamei at 3.0‰ to ambient ammonia-N was 9.33
(8.39–10.37) mg l-1,which was significantly lower than
the results of Lin and Chen (2001) which reported that
the LC50 of ammonia to L. vannamei at 15, 25, and
35‰ were 24.39, 35.40 and 39.54 mg l-1 respectively.