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Fig. 4. Results of the ammonia 96-h LC50 test plotting survivorship of juvenile fish (<16 mm TL) against total ammonia-N concentration (N=30 for each treatment group). Juveniles were reared from eggs harvested in Biscayne Bay and were used within 1 week of full yolk-sac absorption. An arrow depicts the calculated LC50 value. The test was conducted in individual 2-litre chambers for each treatment group with a daily 50% water change, and ammonia concentrations were verified at t0 and at 24 h intervals thereafter.





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