Though shrimps at
3.0ppm and 17.0ppm showed significant death rate in the
whole experiments, all shrimps survived for 96 h where
ammonia-N was .4.00 mg l.1 at all salinities. The 96 h
LC50 with 95% confidence limit of L. vannamei to
ambient ammonia-N was 9.33 (8.39.10.37) mg l.1.