J.O. Harris, G.B. Maguire, S. Edwards, S.M. Hindrum-1998
Aquaculture, 160 (3-4): 259-272 (from Current Contents)
Abstract:
Juvenile greenlip abalone, Haliotis laevigata, (mean whole weight 4.48 +/- 1.9 g, mean +/- s.d., n = 953) were highly sensitive to ammonia as indicated by depressed growth rate and food consumption measured over 2-3 months in bioassay tanks. For growth rate expressed on a whole weight basis, the EC5 and EC50 values (5 and 50% growth reductions) were 0.041 mg FAN/l (Free Ammonia-Nitrogen) and 0.158 mg FAN/l, respectively. Shell growth rates declined over the entire experimental range (0.006-0.188 mg FAN/l). At the end of the bioassay groups of abalone were transferred to respiratory chambers. Oxygen consumption rate increased to a maximum of 188% of control values at 0.235 mg FAN/l and decreased slightly at the highest concentration of 0.418 mg FAN/l.
(Univ. Tasmania, Dept. Aquaculture, POB 1214, Launceston, TAS 7250, Australia)